Machine strength grading 机械强度分级
strength grading of clinker 熟料标号
Strength grading criteria 强度分级标准
strength grading of cement 水泥标号
Strength grading of wood 木材强度分级 ; 木材的强度分级
strength grading of concrete 混凝土强度等级 ; 混凝土标号
Visual strength grading 视觉强度分级
Timber strength grading 锯材强度分等
The effect of maximum diameter, grading distribution and crushing index of coarse aggregate on flexural strength of concrete is investigated through experiments.
本文研究了粗集料的最大粒径、级配和压碎指标值等对路面混凝土抗折强度的影响。
The relationship between uniaxial compressive strength and the velocity of longitudinal wave of concrete material with different grading is found through laboratory testing.
通过试验得出不同级配混凝土试样的纵波波速与其单轴抗压强度的关系。
For mixture, as is still the major domestic use of the Marshall system, grading, testing methods, so this study is to use the Marshall method of its stability, freeze-thaw splitting strength test.
混合料部分，由于国内主要采用的仍然是马歇尔体系的级配，试验方法，所以本研究主要也是使用马歇尔方法对其稳定度，冻融劈裂强度进行检验。
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