摘要
大体积混凝土由于水化热的加速养护促进作用,使得结构实体与标养条件下的混凝土强度增长规律明显不同。试验通过对不同配合比的放热特性进行测定,后将放热参数导入有限元软件进行结构实体的温度场与应力场时变情况预测,根据计算结果提供相应配合比的同步温度制度进行混凝土养护,以反映混凝土实际强度增长趋势,优选同步养护制度下劈裂抗拉强度大于温度应力的配合比,从而形成大体积混凝土匹配抗裂设计方案,大幅提高大体积混凝土抗裂性能。
For the mass concrete, due to the accelerated curing effect of hydration heat, which making the growth law of concrete strength that under the structure entities condition is significantly different from which under the standard curing condition. By testing the heat transfer characteristics of different mixture ratios, then importing the exothermic parameter of experiment into the finite element software to compute the temperature field and stress field of structure. According to the calculation results provide the corresponding synchronous temperature system for concrete curing, which can reflecting the actual strength growth trend of mass concrete, then preferably the mixture which splitting tensile strength is greater than the temperature stress that under temperature synchronous curing system, thus forming the matching crack-resistance design scheme of mass concrete, greatly improved the crack resistance of mass concrete.
出处
《建筑技术》
北大核心
2016年第1期28-31,共4页
Architecture Technology
关键词
大体积混凝土
同步养护制度
温度应力
mass concrete
temperature synchronous curing system
temperature stress