摘要
温度裂缝控制是大体积混凝土应用中需要解决的一个关键问题,结构开裂将会对混凝土的耐久性产生不利影响。为控制大体积混凝土开裂,犍为船闸主要水工建筑物采用低热水泥混凝土进行浇筑,并对实物试样的检验结果、现场采集温度数据及现场混凝土实际效果进行分析。结果表明,各龄期的水化热和混凝土的绝热温升均低于普通水泥,可有效降低混凝土温度应力,减少混凝土开裂风险。低热硅酸盐水泥可较好地应用于船闸工程中的大体积混凝土以解决开裂难题。
Temperature crack control is a key problem to be solved in the application of mass concrete.Structural crack will have a negative impact on the durability of concrete.In order to control the problem of mass concrete cracking,we pour the main hydraulic structures of Qianwei ship lock with the low heat cement concrete,and analyze the inspection results of physical samples,the temperature data collected on site and the actual effect of concrete.The results show that the hydration heat and the adiabatic temperature rise of concrete at each hydration age are lower than these of ordinary cement,which can effectively reduce the temperature stress of concrete and the risk of concrete cracking.The low heat Portland cement can be better used in the mass concrete of ship lock engineering to solve the problem of cracking.
作者
吴礼国
李泳龙
WU Li-guo;LI Yong-long(Sichuan Communication Surveying and Design Institute Co.,Ltd.,Chengdu 610017,China)
出处
《水运工程》
北大核心
2021年第12期115-118,124,共5页
Port & Waterway Engineering
关键词
低热硅酸盐水泥
犍为船闸
温控
抗裂性
low heat Portland cement
Qianwei ship lock
temperature control
crack resistance
