高温天气下大体积混凝土温度控制施工工艺研究  

Research on Temperature Control Construction Technology of Mass Concrete in High-temperature Weather

作　　者：曹金亮 谭龙 姚黎明 王成志 

机构地区：[1]中国水利水电第三工程局有限公司,陕西西安710024

出　　处：《混凝土世界》2023年第8期66-68,共3页China Concrete

摘　　要：为了综合控制混凝土施工全过程的温度影响因素,对高温天气下大体积混凝土温度控制施工工艺进行研究。将具有耐硫酸盐性高、水化热低特点的42.5抗硫酸盐水泥和质量性能指标满足要求的5~26mm碎石作为施工材料,按照水泥、石子、砂、水和外加剂的使用比例为380∶1030∶750∶171∶4的标准配合比,并在拌合阶段对砂石骨料进行遮阴处理,采用冰屑或者冰水进行混凝土的拌合。在施工阶段,合理安排浇筑时间,对具体的施工方式进行针对性设计,并通过浇水养护的方式控制混凝土的内外温差在目标范围以内。结果表明:混凝土的底面、侧面以及顶面温度均呈现出明显的下降趋势,且均出现温度回升的情况。In order to comprehensively control the temperature influence factors in the whole process of concrete construction,this paper studies the temperature control construction technology of mass concrete in high temperature weather.42.5 sulfate-resistant cement with high sulfate resistance and low hydration heat and 5~26mm crushed stone with satisfactory quality and performance indexes are used as construction materials,and the standard proportion of cement,gravel,sand,water,and additives is 380:1030:750:171:4,and the sand aggregate is shaded in the mixing stage.In the construction stage,under the premise of reasonable arrangement of pouring time,design the specific construction method,and control the temperature difference between the inside and outside of concrete within the target range by watering and curing.The results show that the temperature of the bottom,side,and top surfaces of concrete show a significant downward trend,and there is a temperature rise in all cases.

关 键 词：高温天气 大体积混凝土 温度控制 施工工艺 浇筑时间 浇水养护 

分 类 号：TU755[建筑科学—建筑技术科学]