天然石英砂
- 网络Natural quartz sand;natural siliceous sand
天然石英砂-
结果表明，改性石英砂比天然石英砂对浑浊度的去除率平均高出13%以上；
The adsorption filtration tests show that the turbidity removal efficiency of modified quartz sand is13 % higher than natural quartz sand ;
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以50%~60%的超细工业废渣取代水泥，用天然黄砂取代磨细石英砂，采用超细工业废渣多元复合技术，制备出生态型活性粉末混凝土（ECORPC）。
Ecological reactive powder concrete ( ECO-RPC ) with small sized and different volume fraction steel fibers was prepared by substitution of ultra-fine industrial waste powder for 50 % to 60 % cement by weight and replacement of ground fine quartz sand with natural fine aggregate .