混凝土温升抑制抗裂技术在镇江西津湾地下停车场工程中的应用  

Application of the concrete crack control technology based on the adiabatic temperature rise suppression in Zhenjiang Xijinwan underground parking garage

作　　者：杨毅[1] 马士良 王涛 陈大林 徐文 

机构地区：[1]同济大学土木工程学院,上海200092 [2]镇江市城市建设投资集团有限公司,江苏镇江212000 [3]镇江城科新型建材有限公司,江苏镇江212114 [4]江苏苏博特新材料股份有限公司,江苏南京211103

出　　处：《混凝土》2015年第8期143-145,152,共4页Concrete

摘　　要：侧墙混凝土结构温度控制是降低其温降收缩开裂风险的重要措施之一。试验研究了粉煤灰、矿粉和水泥水化热调控材料掺入对水泥水化放热进程和混凝土绝热温升历程的影响。试验结果表明:粉煤灰显著降低水泥水化加速期放热速率、放热速率峰值和放热总量,同等掺量下矿粉对这些参数影响则相对较小,抑制温升效果较差,水泥水化热调控材料显著降低水泥水化加速期放热速率、放热速率峰值,但不影响最终放热总量,绝热温升早期温度上升速率也明显延缓。将基于这些试验结果形成的混凝土配合比和配套施工措施应用于镇江西津湾地下停车场超长结构一次性浇筑过程中,取得了良好的抗裂效果。The temperature rise control is one of the measures to reduce the sidewall concrete structure cracking risk. An experimental research was carried out to evaluate the influences of fly ash, slag and cement hydration heat controlling material on the cement hydration heat release process and concrete adiabatic temperature rise. The results indicated that fly ash reduced the heat flow, heat flow peak value and heat amount of cement obviously, while slag had smaller influences relatively. The cement hydration heat controlling material- reduced the heat flow and heat flow peak value obviously, while the influences on the beat amount were less. At the same time, the early age concrete adiabatic temperature rise was slowed too.The concrete mix proportion and relative supporting construction measures based on theseexperimental results have been successfully applied in the project of Zhenjiang Xijinwan underground parking garage and good anti -cracking effects have been obtained.

关 键 词：温度开裂 水化放热速率 绝热温升 矿物掺合料 混凝土 

分 类 号：TU528.064[建筑科学—建筑技术科学]