钢筋混凝土表面的裂缝宽度,一般在设计阶段就可以相当准确地预测出来。但是不少人对于“为什么要防止裂缝”、“裂缝宽度应该控制多少”的问题,没有给予足够的注意。英国的“水泥混凝土协会”认为,控制裂缝的主要原因,一般有以下两个:外观及钢筋的防腐蚀。但是,很多国家在设计 The width of cracks on the surface of reinforced concrete can be predicted fairly accurately at the design stage. However, many people did not pay enough attention to the question of “why prevent cracks” and “how much crack width should be controlled.” The British cement concrete association believes that the main reasons for controlling cracks are the following two: appearance and corrosion protection of steel bars. However, many countries are designing