It shows the axial tension initial cracking strength of concrete increases with the increasing of steel fiber volume ratio and enhancing of concrete strength grade separately.
结果表明：混凝土轴拉初裂强度分别随钢纤维体积率的增大和混凝土强度等级的提高而增大。
The results showed that the cracking mechanism ratio (CMR) was distinctly dissimilar over different types of catalysts and was correlated with strong Brnsted acid and weak Brnsted acid.
结果表明，不同类型的酸性催化剂，其裂化机理比率(CMR)明显不同，并与强b酸量和弱b酸量有关。
Compared with the normal concrete, ratio of the splitting tensile strength to the compression strength of recycled aggregate concrete with fly ash is increased, and the cracking resistance improved.
掺粉煤灰再生骨料混凝土的拉压比与同强度等级的高强混凝土相比有所提高，抗裂性能有所改善。
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