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补偿收缩混凝土依靠膨胀剂水化反应建立的预压应力,抵抗干缩应力与温度应力,从而提高结构抗裂防渗性能。本文介绍了补偿收缩混凝土在北京小瓦窑军队退休干部住房工程中的应用情况。以强度和限制膨胀率为目标,优化混凝土配合比;通过制定合理浇筑计划,控制混凝土入模坍落度和新旧混凝土接茬时间,预防施工冷缝;注重振捣,加强养护,有效保证了地下车库的防水质量。
The compensated shrinkage concrete relies on the pre-compressive stress established by hydration reaction of expanders to resist the shrinkage stress and temperature stress, so as to improve the anti-crack and anti-seepage performance of the structure. This article describes the application of compensated shrinkage concrete to the housing project of the retired cadres of the Xiaowaoyao Army in Beijing. Optimize the mix proportion of concrete with the goal of strength and limited expansion rate; Prevent the construction cold joints by making proper pouring plan, controlling the slump of concrete into mold and pick-up time of old and new concrete; Pay attention to vibrating and strengthening the maintenance, effectively ensuring the underground garage The waterproof quality.