基于组合混料设计的高性能混凝土配合比优化研究

发布时间：2018-06-10 09:34

本文选题：混料设计 + 高性能混凝土　；参考：《硅酸盐通报》2017年11期

【摘要】：为了更加科学合理地进行高性能混凝土配合比设计,研究各个组分对高性能混凝土的影响,将水泥、矿粉、粉煤灰视为一组总质量不变的混料,细集料和粗集料视为另一组混料,通过组合设计分析了矿物掺合料、水泥、砂率的混料效应,同时得到了以坍落度和抗压强度为目标的回归方程,实现了配合比的优化设计。结果表明,为了得到工作性和抗压强度都较好的高性能混凝土,矿物掺合料的掺量和砂率均不宜过大。矿粉比粉煤灰先发挥强度作用,后期水泥与矿粉对高性能混凝土的抗压强度影响较大。砂率的增大对高性能混凝土的抗压强度影响较小,但会使高性能混凝土的坍落度先增加后降低。粉煤灰和矿粉的增加均会使高性能混凝土的坍落度增加。研究结论能够为高性能混凝土矿物掺合料、砂率的选择和配合比设计提供参考依据。
[Abstract]:In order to design the mix ratio of high performance concrete more scientifically and reasonably, the influence of each component on high performance concrete is studied. Cement, mineral powder and fly ash are regarded as a group of mixtures with constant total quality. Fine aggregate and coarse aggregate are regarded as another group of mixtures. The mixing effects of mineral admixture, cement and sand ratio are analyzed by combination design. At the same time, the regression equations aiming at slump and compressive strength are obtained, and the optimum design of mix ratio is realized. The results show that in order to obtain high performance concrete with good workability and compressive strength, the content of mineral admixture and sand ratio should not be too large. Ore powder first exerts strength effect than fly ash, and cement and ore powder have great influence on compressive strength of high performance concrete in the later stage. The increase of sand ratio has little effect on the compressive strength of high performance concrete, but it will make the slump of high performance concrete increase first and then decrease. The increase of fly ash and mineral powder will increase the slump of high performance concrete. The results can provide reference for the selection of mineral admixture, sand ratio and mix ratio design of high performance concrete.
【作者单位】：河北工业大学土木与交通学院;
【基金】：国家自然科学基金(51309073) 河北省高等学校科学技术研究项目(ZD2014099)
【分类号】：TU528

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