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离心工艺具有以下几个明显的特点:1.离心后,混凝土混合物中会有20～30%(占原用水量)的水分排出,随水排出的水泥量约占水泥用量的5～8%;2.离心后,混凝土的体积较原混合物的体积约缩小10～12%;3.在水灰比相同的情况下,离心混凝土28天的强度比一般振实混凝土约提高20～30%。如何在计算离心混凝土配合比时考虑上述因素,使拌制的混凝土混合物在强度、和易性、耐久性及其他性能等方面,满足设计、制造的要求呢?现就此问题谈点看法。离心混凝土混合物配合比的设计,其基本原理与普通混凝土相同,绝对体积法和假定容重法仍可应用。但考虑到离心工艺的上
Centrifugal process has the following obvious features: 1. After centrifugation, the concrete mixture will have 20 to 30% (of the original water) of the water discharge, with the amount of cement discharged from the water accounted for about 5 to 8% of the amount of cement; 2. After centrifugation, the volume of the concrete is reduced by approximately 10-12% compared to the volume of the original mixture. 3. With the same water-cement ratio, the strength of the centrifuged concrete for 28 days is approximately 20-30% higher than that of the conventional concrete. How to consider the above factors in the calculation of the mix ratio of the centrifugal concrete so that the mixed concrete mixture meets the requirements of design and manufacture in terms of strength, workability, durability, and other properties? Now we will talk about this issue. The design of the mix ratio of the centrifugal concrete mixture is the same as the ordinary concrete. The absolute volume method and the assumed bulk density method can still be applied. But considering the centrifugal process