混凝土结构温度裂缝浅析

一般商品混凝土的水泥用量比较大,产生的水化热较多,在大体积浇筑或冬季施工中,容易造成混凝土内外温差过大,从而引起裂缝,因此在设计中,应对结构中的节点、应力集中处和大体积混凝土沿截面均匀布置细而密的构造钢筋,以提高结构物的抗裂能力.并通过采取在商品混凝土中添加各类外加剂,适当减少水泥用量及延长养护时间、降低构件内外温差等措施,降低混凝土结构产生裂缝的可能性.

Analysis of Temperature Cracks of Reinforced Concrete Structure

In general, the cost of cement for the use of making concrete is very high, which causes a large quantity of heat of hydration. In winter, cracks often appear owning to the the great difference outside and inside temperatures of concrete. In this case, temperature steels are placed on the joint of member and concentration point of stresses to improve the structure's capacity of crack resistance. Many measures can be taken reduce the probability of crack, such as putting kinds of mixture, reducing the amount of cement, prolonging curing period, reducing the outside and inside range of temperature of members, etc.