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1工程中影响温度裂缝产生的不利因素1.1材料因素由于采用商品混凝土,其水灰比大,收缩变形大,如果泵送,则水灰比更大。商品混凝土多采用普通硅酸盐水泥,其早期强度高、水化热大,同时,商品混凝土供应商为了提高混凝土的和易性,多采用河卵石作为粗骨料,而卵石强度比碎石低,所以水泥用量增加,水化热提高。
1 adverse factors affecting the temperature cracks in the project 1.1 Material Factors due to the use of commercial concrete, the water-cement ratio, shrinkage deformation, if pumping, the water-cement ratio greater. Ordinary Portland cement used in commercial concrete, its early strength, hydration heat, at the same time, commercial concrete suppliers to improve the workability of concrete, more use of pebbles as a coarse aggregate, and the pebble strength is lower than the gravel , So the amount of cement increased hydration heat increased.