水泥混凝土路面的混凝土标号,一般不低于250-300,施工时水灰比又偏低,如天气干热,经风吹日晒,表面极易干缩,发生裂纹。同时,裂纹还会随着时间的增长,逐渐展宽、加深、延长,影响路面质量。过去,有用苫布或塑料棚覆盖的,以挡风遮日。但费工费料耗资大又不易操作,工人不愿使用。今年5月至8月我们在津秦公路水泥混凝土 Cement concrete pavement concrete label, generally not less than 250-300, the construction of the water-cement ratio is too low, such as dry weather, the wind and sun, the surface is extremely easy to shrink, crack. At the same time, the cracks will gradually broaden, deepen and extend as the time increases, affecting the quality of pavement. In the past, covered with cloth or plastic shed, the wind shelter. However, labor costs are expensive and not easy to operate, and workers are reluctant to use it. From May to August this year, we are on the Qinhuangdao Cement Concrete Road