ratio of aggregates

A lot of researchers have paid attention on the cement, the water ratio as well as the admixture such as the fly ash. But research on the aggregate is not full, aggregates account for 65%~ 75% in the volume of the concrete.

很多研究人员把注意力放在了水泥、水灰比、外加剂及粉煤灰等外掺料，但对集料的研究并不充分，水泥混凝土中的集料占到了65%～75%。

Shape features of coarse aggregates include contour shape, angular features and surface texture. Contour shape represents the overall shape ratio of a particle, angular feature is the prominent degree of the angular on the profile, and texture describes the surface roughness of a particle.

粗集料形态特征包括轮廓形状，棱角特征和表面纹理，轮廓形状表征的是颗粒的整体形状尺寸比例，棱角性表征的是颗粒轮廓上棱角的突出程度，纹理描述的是颗粒表面的粗糙度。

One is Q, the ratio of voids content of coarse aggregates to the volume of mortar.

Q反映新拌混凝土中砂浆的体积与粗骨料紧密堆积时产生的空隙体积的比值；