大体积混凝土水化热及温度裂缝控制技术综述  

Hydration Heat and Temperature Crack Control of Mass Concrete

作　　者：于全 Yu Quan(China Railway 16st Bureau Group Road&Bridge Engineering Co.,Ltd.,Beijing,China)

机构地区：[1]中铁十六局集团路桥工程有限公司,北京

出　　处：《科学技术创新》2025年第7期132-135,共4页Scientific and Technological Innovation

摘　　要：我国基础设施建设逐渐向大型化、复杂化方向迈进,随之而来的是大体积混凝土在现代基础设施中被普遍应用。其中混凝土的温控防裂作为重难点问题受到人们的关注。由于混凝土是不良导热体,在反应初期,大量的水化放热在短时间内迅速释放,并在结构内部积累,与空气接触的外表面热交换速率较快,混凝土整体呈现高温区域由内部向外扩散的趋势,结构内外温差逐渐增大。当温度差值过大的时候,就会增加混凝土开裂的风险,影响结构的使用寿命。因此,对大体积混凝土水化温度场的精确模拟与温度裂缝的准确控制显得尤为重要。China's infrastructure construction is gradually moving towards large-scale and complexity,and with it,large-volume concrete is widely used in modern infrastructure.Among them,the temperature control and crack prevention of concrete has attracted people's attention as a major and difficult problem.Because concrete is a poor heat conductor,in the early stage of the reaction,a large amount of hydration heat release is quickly released in a short period of time,and accumulates inside the structure,the heat exchange rate of the outer surface in contact with air is fast,and the concrete as a whole shows a trend of diffusion from the inside to the outside of the high-temperature area,and the temperature difference between the inside and outside of the structure gradually increases.When the temperature difference is too large,it increases the risk of cracking the concrete and reduces the durability of the structure.Therefore,the research on the control technology of hydration heat and temperature cracks in large-volume concrete has practical engineering value.

关 键 词：大体积混凝土 水化热 温度应力 温度裂缝 

分 类 号：TU755.7[建筑科学—建筑技术科学]