It also studies the influences of W/C ratio, water reducer, and air- detraining admixture on the porosity and apparent porosity and of porosity and apparent porosity on the intensity.
文章简要介绍了水泥石各种类型气孔的形成原因，研究了水灰比、减水剂、消泡剂对孔隙率、表观孔隙率及强度等的影响。
The large opening of the bell reducer keeps air velocity low thus preventing moisture re-entrainment.
的大开口度使空气流量保持较低从而避免把水分再次带走。
The large opening of the bell reducer keeps air velocity low thus preventing moisture re-entrainment.
的大开口度使空气流量保持较低从而避免把水分再次带走。
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