The results indicated that the addition of silica fume increased cracking of HPC at early age,and the addition of finely ground fly ash with high quality decrea.

 
  • 結果表明:摻硅灰加劇了混凝土的早期開(kāi)裂;優(yōu)質(zhì)磨細粉煤灰的加入對混凝土早期開(kāi)裂有一定的抑制作用。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan