等大球最紧密堆积使其在地球各层圈中晶体结构保持恒定。
It maintains the same crystal structure in all layers of the earth.
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；
One is Q, the ratio of voids content of coarse aggregates to the volume of mortar.
但用于紧密堆积的微细胶凝颗粒应是水化膜薄、外形呈球形、具有较好活性的颗粒。
However, the fine gelling particle should have thin hydration film, spherical shape, and better activity.
应用推荐