摘要
现代工程建设中砼已经成为构筑物的主要材料,并占有重要的地位。随着砼的大量应用,也常伴随着各种通病的发生,砼的裂缝已成为砼构筑物的危害之一,特别在桥梁施工中裂缝几乎无所不在。尽管我们在施工中采取各种措施,小心谨慎,但裂缝仍然时有出现。其最主要原因是我们对混凝土的温度应力变化注意不够,在大体积砼中温度应力及温度的控制具有重要的意义。
Concrete is the main material of constructional work in modem engineering. Widely application of concrete will cause many quality common faults, such as concrete crack. In bridge construction concrete crack is especially serious. The main causation is that we are not pay great importance to the concrete thermal stress. The thermal stress and temperature control is important in bulk concrete construction.
出处
《林业科技情报》
2007年第3期116-117,共2页
Forestry Science and Technology Information
关键词
温度应力
极限拉伸
水化热
弹性模量
thermal stress
utmost tension
hydration heat
modulus of elasticity
