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以往版本的施工手册做法不统一,计算方法不一致,很难控制好大体积混凝土的施工质量。大体积混凝土的温度应力、收缩应力的控制及养护方法对混凝土的裂缝控制、混凝土的耐久性等影响很大,《大体积混凝土施工规范》(GB50496—2009)为大体积混凝土的施工给定了依据。一、温控指标宜符合下列规定(1)混凝土浇筑体在入模温度基础上的温升值不宜大于50℃。
Previous versions of the construction manual approach is not uniform, the calculation is inconsistent, it is difficult to control the mass concrete construction quality. Mass concrete temperature stress, shrinkage stress control and conservation methods of concrete crack control, durability of concrete and other great influence, “Mass Concrete Construction Code” (GB50496-2009) for the construction of mass concrete given in accordance with. First, the temperature control index should meet the following requirements (1) concrete pouring body temperature on the basis of the mold temperature value should not be greater than 50 ℃.