expansive power造句

• Inorganic anti - cracking reinforced chemical additive , called wj , generates some tittle expansive crystals in hydration process in concrete to reduce the porosity and improve the distribution of pore size . the expansive power is process in common to tumefaction that petty crystalloid aft suck water and pressure to concrete pores that aft crystal gather volume . its adding weight was 8 % - - 12 % in cement , its restrained expansive ratio was about 0 . 02 % - - 0 . 06 % , and relevantil brought self - stress 0 . 2mpa ? . 6mpa
  无机增强抗裂材料wj掺入普通混凝土中，在水化硬化过程中生成一定量的微膨胀结晶体，降低空隙率，改善混凝土中孔结构分布。其膨胀驱动力是凝胶尺寸的晶体钙矾石吸水肿胀和结晶状钙矾石对孔隙产生膨胀压的共同作用。当wj掺量为8一12儿在钢筋和邻位的限制下，使混凝土产生0