表面保温措施对大体积底板及侧墙混凝土开裂风险的影响  

Effect of Surface Insulation on Cracking Risk of Mass Concrete Floor and Side Wall Concrete

作　　者：刘发[1] 李明 姚婷 LIU Fa;LI Ming;YAO Ting(Jiangsu Traffic Engineering Construction Bureau,Nanjing 210004 China;State Key Laboratory of High Performance Civil Engineering Materials,Jiangsu Sobute New Materials Co.,Ltd.Nanjing 211103,China)

机构地区：[1]江苏省交通工程建设局,江苏南京210004 [2]江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室,江苏南京211103

出　　处：《徐州工程学院学报（自然科学版）》2018年第4期76-79,88,共5页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

摘　　要：表面保温是控制大体积混凝土开裂的重要措施,不同结构大体积混凝土产生裂缝的特点及原因均有所不同.基于"水化-温度-湿度-约束"多场耦合评估机制和模型,评估了大体积底板及侧墙结构混凝土的开裂风险,定量分析了表面保温措施与开裂风险之间的关系,结合不同结构尺寸及开裂原因,提出了精细化表面保温措施及裂缝控制方案.Surface thermal insulation is an important measure to control cracking of mass concrete,but the characteristics and the reasons of cracks in mass concrete are varied with different structures.The strong-coupling model based on the hygro-thermo-chemo-mechanical coupling phenomena was adopted to describe the cracking behavior of mass bottom floor and sidewall concrete,and the relation between surface thermal insulation and cracking risk was quantitatively analyzed.Combined with size and cracking reasons of different concrete structures,the refined surface thermal insulation measures and crack control scheme were proposed.

关 键 词：大体积混凝土 表面保温 开裂风险 内外温差 

分 类 号：TU528.32[建筑科学—建筑技术科学]