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掺高效减水剂的混凝土的稠度要比掺普通减水剂的混凝土有明显地改善,因此高效减水剂迅速地被用于制备高强混凝土和流动混凝土。混凝土的稠度虽受水灰比、砂石比、减水剂掺量、单位水泥用量、单位用水量等因素的影响,但影响程度还未被广泛地研究。尤其对于振动混凝土的流动特性,还不很清楚。本文研究了掺高效减水剂的半干硬性混凝土的静态与动态稠度,其坍落度、CF、VB、VF的各种试验(说明见59页)是以变更配比——水灰比30～50％,减水
The consistency of concrete with superplasticizer is significantly improved than that of concrete with ordinary water reducer. Therefore, superplasticizer is rapidly used to prepare high-strength concrete and flowing concrete. Although the consistency of concrete is affected by the ratio of water to cement, the ratio of sand to stone, the amount of superplasticizer, the amount of cement used, and the unit water consumption, the degree of influence has not been extensively studied. Especially for the flow properties of vibrating concrete, it is not very clear. In this paper, the static and dynamic consistency of semi-rigid hard concrete with superplasticizers were studied. The slumps, CF, VB, and VF tests (described on page 59) were based on changing ratios—water-cement ratio 30. ~50%, water reduction