The porosity and flexural strength of the material decrease with the rising of the aggregate particle size;
随着骨料粒度的增大，材料气孔率降低，抗弯强度降低；
Results show that simple composition and stable properties of W oxide is a prerequisite for quality WC powder with uniform particle size and less aggregate.
结果表明：保证原料氧化钨相成分单一和性能稳定是生产粒度均匀、聚团少的优质WC粉的前提；
Selection of materials include characteristics of cement, particle size, intrinsic strength, shape and texture of aggregate, chemical admixtures and mineral admixtures, etc.
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。
In this paper the characteristic of the particle size constitute of the natural aggregate is analysed and based on this the formula for calculating the specific surface of aggregate is derived.
本文剖析了天然集料的粒径构成特征，并据以导出计算集料此表面积的公式。
In this paper the characteristic of the particle size constitute of the natural aggregate is analysed and based on this the formula for calculating the specific surface of aggregate is derived.
本文剖析了天然集料的粒径构成特征，并据以导出计算集料此表面积的公式。
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