材料的选择包括水泥的品质、集料粒径、集料强度、颗粒形状和质地、化学外加剂、矿物掺合料等。
Selection of materials include characteristics of cement, particle size, intrinsic strength, shape and texture of aggregate, chemical admixtures and mineral admixtures, etc.
结果表明，高强次轻混凝土梁比轻集料混凝土梁的抗剪承载力有较大的提高，且比普通混凝土梁的抗剪强度大；
The tests indicated that the ultimate shear strength of it was a little larger than normal-weight concrete beam's, and larger than lightweight concrete beam.
研究分析了再生粗集料不同取代率对再生混凝土各种强度指标的影响。
The influence of different recycled coarse aggregate (RCA) replacement ratios on the strength of recycled concrete was investigated.
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