混凝土养护怎么做才算到位？标准总结！
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">混凝土浇捣后，之所以能逐渐凝结硬化，主要是因为水泥水化作用的结果，而水化作用则需要适当的温度和湿度条件，因此为了保证混凝土有适宜的硬化条件，使其强度不断增长，必须对混凝土进行养护。</span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/dece9c765c1a4d14aa7ca51ee850f470~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=liBCZ4mEnQ4jff4lFXEkkpMF5N8%3D" style="width: 100%; margin-bottom: 20px;"></div>
<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;"><span style="color: green;">一、</span></span><span style="color: green;">基本要求</span></strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">1、采用硅酸盐水泥、普通硅酸盐水泥或矿渣硅酸盐水泥配置的混凝土，不应小于7天；采用其他品种的水泥时，养护时间应根据水泥性能确定。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">2、采用缓凝型外加剂、大掺量矿物掺合料配置的混凝土，不应少于14天。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">3、抗渗混凝土、强度等级C60及以上的混凝土，不应少于14天。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">4、后浇带混凝土的养护时间不应少于14天。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">5、地下室底层墙、柱和上部结构首层墙、柱，宜适当增加养护时间。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">6、混凝土强度达到1.2MPa之前，不得在其上踩踏、堆放物料、安装模板及支架。</span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/5a9103f47a59427283efca9bcbc1ba13~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=Ktth25k3KlDRo2VQ21F5y%2Fez1Z0%3D" style="width: 100%; margin-bottom: 20px;">
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">混凝土强度达到1.2MPa的时间估计（h）</p>
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<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">7、同条件养护试件的养护条件应与实体结构部位养护条件相同，并应妥善保管；如放置在专用钢筋焊接笼内，并上锁。</span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/073c8cf8a0ee4287bc12c58726958cbc~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=%2FZILJ22DSRu2DnMQEavVE0VKiZI%3D" style="width: 100%; margin-bottom: 20px;"></div>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/55321864a7bb4aefb25cb0337adcc507~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=kxTzLazjLKJUcW66Vcc6VIUPYp8%3D" style="width: 100%; margin-bottom: 20px;"></div>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/472de4689a604d4d8c2136d2000305c4~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=r2ZvhihDXn3KRZk329WPdpjwTGc%3D" style="width: 100%; margin-bottom: 20px;">
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">同条件试块入笼养护</p>
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<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;"><span style="color: green;">二、</span></span><span style="color: green;">混凝土养护方式、范围及要求</span></strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;">1、养护方式：洒水养护</strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">适用范围：所有现浇混凝土工程或预制工程。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">养护要求：洒水养护宜在混凝土裸露表面覆盖麻袋或草帘后进行，也可以采用直接洒水、蓄水等养护方式，洒水养护应保证混凝土表面处于湿润状态；当天温度低于5°C时，不宜采用洒水养护。覆盖养护结束尚未达到养护时间要求时，可采用洒水养护方法直至养护结束。</span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/337d689c3e764764843f7fdf2ec09690~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=K9g%2FgfQ%2BSmG9e0bWJO9AW71n65E%3D" style="width: 100%; margin-bottom: 20px;"></div>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/b783782db76f4f53a1d7d17ec9786580~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=XREw%2BXJB%2FlS41m8KcV%2Fj4ivNSMw%3D" style="width: 100%; margin-bottom: 20px;">
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">混凝土洒水养护</p>
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<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;">2、养护方式：覆盖养护</strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">适用范围：楼板、梁、筏板、墙柱、基础大体积混凝土等现浇结构。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">养护要求：覆盖养护宜在混凝土裸露表面覆盖塑料薄膜、塑料薄膜及麻袋、塑料薄膜及草帘进行，塑料薄膜应紧贴混凝土裸露表面，塑料薄膜内应保持凝结水；覆盖物应严密，覆盖物的层数应按施工方案确定；基础大体积混凝土裸露表面应采用覆盖养护方法，当混凝土浇筑体表面以内40-100mm位置的温度与环境温度的差值小于25°C时，可结束覆盖养护。</span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/72460d88067d45dcae47d603a1d9a2f7~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=Ckonh4SJOT%2Fr9gkdv91ISVgDgDk%3D" style="width: 100%; margin-bottom: 20px;">
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">混凝土覆盖养护</p>
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<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;">3、养护方式：喷涂养护</strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">适用范围：墙、柱及预制工程等构件。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">养护要求：应在混凝土裸露表面喷涂覆盖致密的养护剂进行养护；养护剂应均匀喷涂在结构构件表面，不得漏喷，养护剂应有可靠的保湿效果，保湿效果应通过试验检验；养护剂使用方法应符合产品说明书的有关要求。</span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/72da0c7afccb42eca01223b19a9d3173~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=h5GdOFI6u3jMxqAn3u9SBi%2BcUH4%3D" style="width: 100%; margin-bottom: 20px;">
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">混凝土喷涂养护</p>
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<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;"><span style="color: green;">三、</span></span><span style="color: green;">冬期混凝土养护测温要求</span></strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;">1、混凝土养护期间的温度测量规定：</strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（1）受冻临界强度之前应每隔4h~6h测量一次；</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（2）混凝土在达到受冻临界强度后，可停止测温；</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（3）大体积混凝土养护期间的温度测量应符合现行国家标准《大体积混凝土施工规范》GB50496的相关规定。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;">2、冬期混凝土养护温度的测量方法规定：</strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（1）测温孔应编号，并应绘制测温孔布置图，现场应设置明显标识。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（2）测温时，测温元件应采取措施与外界气温隔离；测温元件测量位置应处于结构表面下20mm处，留置在测温孔内的时间不应少于3min。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（3）采用非加热法养护时，测温孔应设置在易于散热的部位；采用加热法养护时，应分别设置在离热源不同的位置。</span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/3e038610853c43c7a8ff9913eab49745~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=V%2FVtFLtZbus7KCmVRQa%2BN9RbCnA%3D" style="width: 100%; margin-bottom: 20px;">
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;">冬期混凝土养护测温</p>
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<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;">附</span></strong></span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;"><strong style="color: blue;">混凝土养护时间总结</strong></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;"><span style="color: green;">1、</span></span><span style="color: green;">普通混凝土</span></strong></span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/40d8f2a459d24d0a9aff5a464fc7dc73~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=X%2BqTyFgr9eZIK%2BXdOBV4wyjXqcU%3D" style="width: 100%; margin-bottom: 20px;"></div>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（1）对已浇筑的混凝土，应在混凝土终凝前（通常为混凝土浇筑完毕后的8～12h内）开始自然养护。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（2）混凝土试件标准养护龄期为28d，检测其抗压强度。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（3）混凝土浇筑完毕：① 12h内加以覆盖并保湿养护。② 浇水养护的时间，对采用硅酸盐水泥、普硅水泥、矿渣水泥拌制的混凝土，不得少于7d，对掺用缓凝型外加剂或有抗渗要求的，不得少于14d。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（4）整体面层施工后，养护时间不应少于7d，抗压强度达到5MPa后方准上人行走。</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;"><span style="color: green;">2、</span></span><span style="color: green;">防水混凝土</span></strong></span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/ffc7bb905d3e4f6095cfb849f11dcebd~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=JdOtZ4SIK3090oSdbN3CsS%2Bm2Ds%3D" style="width: 100%; margin-bottom: 20px;"></div>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">终凝后应立即进行养护，养护时间不得少于14d。</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;"><span style="color: green;">3、</span></span><span style="color: green;">后浇带</span></strong></span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/c4f4151f3f5c48bfb78e782ec5fd649c~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=Kj8c182p%2FeCqCGaYvj5JiQJ3db0%3D" style="width: 100%; margin-bottom: 20px;"></div>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（1）应在混凝土浇筑完毕后的12h内对混凝土加以覆盖进行保湿养护。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（2）后浇带至少保留28d，并保持至少15d的湿润养护。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（3）后浇带的防水施工：① 两侧混凝土龄期应达到42d；② 养护时间不少于28d。</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;"><span style="color: green;">4、</span></span><span style="color: green;">大体积混凝土</span></strong></span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/11a7945783c64faabda84504924f141a~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=8HoCxkVSlmAU7DIA9RbPESD4SHc%3D" style="width: 100%; margin-bottom: 20px;"></div>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（1）大体积混凝土，保湿养护的持续时间不得少于14d。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（2）大体积混凝土：当采用普通硅酸盐水泥，养护时间不得少于14d；当采用矿渣水泥，火山灰水泥养护时间不得少于21d；防水混凝土终凝后，应立即进行养护，养护时间不得少于14d。</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;"><span style="color: green;">5、</span></span><span style="color: green;">喷射混凝土</span></strong></span></p>
<div style="text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/tos-cn-i-qvj2lq49k0/da74563324664fb9bd56e2f882724117~noop.image?_iz=58558&from=article.pc_detail&lk3s=953192f4&x-expires=1713411316&x-signature=pwIzNWvQ7fDxFc45jHg2cwDSBRY%3D" style="width: 100%; margin-bottom: 20px;"></div>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（1）喷射混凝土终凝后2h后养护，养护时间不得少于14d。</span></p>
<p style="font-size: 18px; line-height: 40px; text-align: left; margin-bottom: 30px;"><span style="color: green;">（2）气温低于5℃时，不得喷水养护。</span></p>
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