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一、在石灰炉灰三合土底层上进行表面处治天津市是不产沙石地区,沙石材料须从200公里以外运来,每方价格高达25元,几午来,采用石灰土加固基层,以减薄石料面层的厚度,对降低工程造价取得显著效果。亦曾试用石灰土作承重层,上面即加铺沥青表面处治,但往往出现过多的龟裂与横向裂缝。1956年在尖山住宅区泰山路修筑试验路段,在石灰土中掺加炉灰骨料以改善其收缩性质,并在三合土上加铺单层表面处治,根据1962年调查,裂缝间距平
First, the surface treatment of lime ash sand mixed with the ground floor Tianjin is not sand production area, sand and stone materials to be shipped from 200 kilometers away, each party up to 25 yuan price, a few days, the use of lime soil reinforcement grass-roots to Thinning the surface layer of stone thickness, to reduce the project cost has achieved remarkable results. Limestone soil has also been tried as a bearing layer, which is treated with asphalt surface treatment, but often there are too many cracks and horizontal cracks. In 1956, the pilot section was built in Taishan Road, Jianshan residential area. The limestone aggregate was added with limestone aggregate to improve its shrinkage property. The single layer surface treatment was added to the tri-earth soil. According to the investigation in 1962,