速速扩散！你不知道的免养护剂性能
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<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">摘要</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">混凝土免养护剂分子特征可以固定周围环境中的水介质，形成高含水凝胶而不溶解，使胶凝材料水化过程具有弹性凝胶的基本性能，可以使水泥水化体系在较长时间内保持较高的内部相对湿度，即保证了水泥水化的持续进行，又抑制了混凝土界面的早期干燥，可应用于混凝土墙、柱等不易养护的部位。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">1.前言与实验用原材料</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">建设工程中的楼板、梁柱和剪力墙等部位，在多风干燥、气候炎热的环境中，，混凝土的失水
速度很快，特别是暴露面积大的剪力墙，不易养护，表面失水速率更快。因此混凝土裂缝较多，影 响外观质量，碳化深度增加，影响回弹强度值，对外观质量、强度指标和耐久性造成严重的后果。
根据查找有一种混凝土免养护剂可以显著地降低混凝土的自收缩率以及干缩率，改善混凝土内部结 构，使之更加致密。我们索取样品进行了试验。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">1.1<span style="color: green;">水泥</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">本试验选用唐山冀东<span style="color: green;">P* O42. 5</span>水泥，其主要性能指标见表<span style="color: green;">1</span>。</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">1</span>水泥主要的物理力学性能</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">细度（％<span style="color: green;">■)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">标准稠度用水量（％<span style="color: green;">■)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">安定性</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">凝结时间</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">(h </span><span style="color: green;">:</span><span style="color: green;">min)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">抗压强度（<span style="color: green;">MPa)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">抗折强度（<span style="color: green;">MPa)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">初凝</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">终凝</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">3d</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">28d</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">3d</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">28d</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1.1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">28. 6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">合格</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2 </span>：<span style="color: green;"> 15</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2 </span>：<span style="color: green;"> 40</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">28. 3</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">52. 6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">6.1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">9. 1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"> 1.2 粉煤灰</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">本试验选用德州华能电厂生产的<span style="color: green;">"</span>级粉煤灰，其主要的技术性能指标见表<span style="color: green;">2</span>。</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">2</span>粉煤灰主要的技术性能指标</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">度<span style="color: green;">(%)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">需水量比<span style="color: green;">（</span><span style="color: green;">!</span>％<span style="color: green;">)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">含水量（：％<span style="color: green;">)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">烧失量（<span style="color: green;">M)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">活性指数（<span style="color: green;">M)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">三氧化硫含量（<span style="color: green;">M)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">15.6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">99</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0. 42</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">4. 65</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">76</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0. 28</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1.3矿粉</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">本试验选用的天津天丰矿渣粉，其主要品质指标见表3</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">密度</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">比表面积</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">流动度比</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">7d</span>活性指数</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">28d</span>活性指数</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2.9</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">416</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">96</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">103</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">1.4</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">本试验选用的天然砂为石家庄新乐中砂，其主要品质指标见表4。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">表4中砂主要品质指标</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">种类</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">细度模数</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表观密度</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">含泥量</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">泥块含量</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">(kg/m3)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">(%)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">(%)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">天然砂</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2. 3</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2600</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0.4</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0. 0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">1.5<span style="color: green;">石</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">本试验选用连续级配5!20mm的保定满城碎石，其主要品</span><span style="color: green;">质指标见表</span><span style="color: green;">5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">表5 主要指</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">类别</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表观密度（<span style="color: green;">kg/m3)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">针片状含量（<span style="color: green;">M)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">压碎指标（<span style="color: green;">M)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">含泥量（<span style="color: green;">M)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">泥块含量（<span style="color: green;">M)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2620</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2. 0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">7.0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0. 2</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1.6外加剂</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">本试验使用江苏苏博特聚羧酸高效减水剂，其主要性能指标见表<span style="color: green;">6</span>。</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">6</span>聚羧酸高效减水剂主要的技术性能指标</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">生产厂家</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">密度（<span style="color: green;">g/mL)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">pH</span>值</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">固含量</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">减水率<span style="color: green;">（</span><span style="color: green;">!</span><span style="color: green;">％</span><span style="color: green;">)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">江苏苏博特新材料有限公司</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1.074</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">7.2</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">12. 0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">25. 6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1.7免养护剂指标</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">免养护剂的技术指标见表<span style="color: green;">7</span><span style="color: green;">。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">7</span>免养护剂的技术指标</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">序号</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">项目</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">指标</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">酸值（<span style="color: green;">mgKOH/g)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">小于等于<span style="color: green;">1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">3</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">密度（<span style="color: green;">25°C</span>，<span style="color: green;">g/mL )</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1. 24</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">4</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">经值（<span style="color: green;">mgKOH/g)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">220!240</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">水分</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">小于<span style="color: green;">0. 1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">1.8<span style="color: green;">水</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">本试验用水为洁净自来水。</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">2.试验</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2.1配合比设计思路</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">在相同的材料用量条件下，试验两个强度等级：C30和C50,采取标养和放在屋顶露天养护 (相对恶略的条件）两种方式，检测不同龄期不加养护剂和加养护剂的试件的回弹强度、碳化深度和抗压强度的区别。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2.2配合比</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">试验所用的配合比见表8。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">8</span>试验所用的配合比单位：<span style="color: green;">kg/m3</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">编号</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">强度</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">水泥</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">矿粉</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">粉煤灰</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">砂</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">石</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">水</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">减水剂</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">免养护剂</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K01</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">220</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">680</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1165</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">170</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">8</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K02</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">220</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">680</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1165</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">170</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">8</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1. 5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K03</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">330</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">600</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1160</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">160</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">10. 5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K04</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">330</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">80</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">600</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1160</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">160</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">10. 5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1. 5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">3.实验结果</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;"><span style="color: green;">3.1</span></strong>露天养护3天试验结果见表9。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">9</span>露天养护<span style="color: green;">3</span>天试验结果</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">编号</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">强度等级</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">回弹强度</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">碳化深度（<span style="color: green;">mm)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">抗压强度（<span style="color: green;">MPa)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K0!</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">11.6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">11. </span><span style="color: green;">3</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K02</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">12.5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">12.8</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K03</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">25.1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">22.8</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K04</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">28. </span><span style="color: green;">5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">26.1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><strong style="color: blue;"><span style="color: green;"><span style="color: green;">3.<span style="color: green;"> 2</span></span></span></strong><span style="color: green;">露天养护7天试验结果见表10。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">10</span>露天养护<span style="color: green;">7</span>天试验结果</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">编</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">强度等级</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">回弹强度</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">碳化深度（<span style="color: green;">mm)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">抗压强度（<span style="color: green;">MPa)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K0!</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">15.2</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2.0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">19. </span><span style="color: green;">3</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K02</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">19. </span><span style="color: green;">6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1.5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">22. </span><span style="color: green;">6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K03</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">27. </span><span style="color: green;">5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0. </span><span style="color: green;">8</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">37. </span><span style="color: green;">6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K04</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">30.0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0. </span><span style="color: green;">5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">38.1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;"><span style="color: green;">3.3<span style="color: green;"> 标样</span></span></strong>7 试验结果表</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">11</span>标养<span style="color: green;">7</span>天试验结果</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">编</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">强度等级</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">回弹强度</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">碳化深度（<span style="color: green;">mm)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">抗压强度（<span style="color: green;">MPa)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K0!</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">17.1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">22.2</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K02</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">20.</span><span style="color: green;">1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">26. </span><span style="color: green;">6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K03</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">32.1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">41. </span><span style="color: green;">9</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K04</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">35.</span><span style="color: green;">1</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">41. </span><span style="color: green;">6</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;"><span style="color: green;">3.4</span></strong>养护!4 试验结果表!2。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">表<span style="color: green;">12</span>露天养护<span style="color: green;">14</span>天试验结果</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">编</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">强度等级</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">回弹强度</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">碳化深度（<span style="color: green;">mm)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">抗压强度（<span style="color: green;">MPa)</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K0!</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">20.4</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2. </span><span style="color: green;">5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">22. </span><span style="color: green;">9</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K02</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C30</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">22.0</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">26. </span><span style="color: green;">7</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K03</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">31. </span><span style="color: green;">3</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1. </span><span style="color: green;">3</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">42. </span><span style="color: green;">5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">K04</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">C50</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">34.4</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">0. </span><span style="color: green;">8</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">44. </span><span style="color: green;">5</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">4.免养护剂对混凝土性能的影响</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">4.1对工作性能的影响</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">加入免养护剂，混凝土的初始坍落度比基准混凝土稍大混凝土的和易性好。</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">4.2免养护剂对混凝土力学性能的影响</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">由表9!表12可以看出，相同龄期、相同养护条件，使用免养护的混凝土回填强度都高于未使 用养护剂的混凝土；相同龄期、相同养护条件，使用免养护的混凝土抗压强度都高于未使用养护剂 的混凝土。</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">4.3免养护剂对混凝土碳化深度的影响</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">由表9表12可以看出，相同龄期露天养护，使用免养护的混凝土的碳化深度小于未使用养护</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">剂的混凝土。</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">5.结论</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">(1)使用免养护剂可提高混凝土的回弹强度和抗压强度。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">(2)使用免养护剂可减小混凝土的碳化深度，提高混凝土的耐久性。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">从短龄期的试验结果看，使用免养护剂可提高混凝土的强度和耐久性。如果保持相同抗压强度 时，使用免养护剂的混凝土可适当降低胶凝材料用量，综合成本相当，具有推广价值。</span></p><img src="https://mmbiz.qpic.cn/mmbiz_png/BmCicKY4y7GibcmDeOoicicDZmN4wTAmKf9YYHbJPjicAOP7es8nBpIkiaTaGMl7DHNrWmJNeJJmfQ79US3hVC99JmWQ/640?wx_fmt=png&tp=webp&wxfrom=5&wx_lazy=1&wx_co=1" style="width: 100%; margin-bottom: 20px;">
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">作者简介</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">刘世涛，男，工作单位：河北沧州市政集团混凝土分公司。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">赵志强，男，河北省衡水市人，高级工程师，参编《数字量化混凝土实用技术》，主编《混凝土工作性调整》《混凝土生产工艺与质量控制》等。</p><img src="https://mmbiz.qpic.cn/mmbiz_png/BmCicKY4y7G9qRfBQ8hg6dXLrTIOuMnVFOT7mDk2gib33vXlw77Uoiad4JTVPmWkiaEcwPF8dgxvh7uWuuBRnLIRIw/640?wx_fmt=png&tp=webp&wxfrom=5&wx_lazy=1&wx_co=1" style="width: 100%; margin-bottom: 20px;">
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">混凝土第一视频网</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">官<span style="color: green;">方网站</span></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">http://www.hntc30.com/</p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><strong style="color: blue;"><span style="color: green;">欢迎关注和留言</span></strong></p><img src="https://mmbiz.qpic.cn/mmbiz_jpg/BmCicKY4y7GibcmDeOoicicDZmN4wTAmKf9YMA5gAIwKeFQsDzr3G0asEEEpbFpicgOFiaGlJzDcbqjBqywNAcSHIDtA/640?wx_fmt=jpeg&tp=webp&wxfrom=5&wx_lazy=1&wx_co=1" style="width: 100%; margin-bottom: 20px;">
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