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Viability of Two New Mixture Design Methodologies for Self-Consolidating Concrete

机译:两种新的自固混凝土混合物设计方法的可行性

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摘要

This paper presents the results from an experimental study of the technical viability of two mixture designs for self-consolidating concrete (SCC) proposed by two Portuguese researchers in a previous work. The objective was to find the best method to provide the required characteristics of SCC in fresh and hardened states without having to experiment with a large number of mixtures. Five SCC mixtures, each with a volume of 25 L (6.61 gal.) were prepared using a forced mixer with a vertical axis for each of three compressive strength targets: 40, 55, and 70 MPa (5.80, 7.98, and 10.15 ksi). The mixtures' fresh state properties of fluidity, segregation resistance ability, and bleeding and blockage tendency, and their hardened state property of compressive strength were compared. For this study, the following tests were performed. slump-flow, V-funnel, L-box, box, and compressive strength. The results of this study made it possible to identify the most influential factors in the design of the SCC mixtures.
机译:本文介绍了来自两名葡萄牙研究人员在先前工作中提出的两种用于自固结混凝土(SCC)的混合料设计技术可行性的实验研究结果。目的是找到最佳方法,以提供新鲜和硬化状态下所需的SCC特性,而无需试验大量混合物。使用具有垂直轴的强制混合器,分别针对以下三个抗压强度目标:40、55和70 MPa(5.80、7.98和10.15 ksi),制备五种SCC混合物,每种混合物的体积为25 L(6.61加仑)。 。比较了混合物的流动性,抗偏析能力,渗出和阻塞趋势的新鲜状态特性,以及压缩强度的硬化状态特性。对于本研究,进行了以下测试。坍落度,V型漏斗,L型箱,箱和抗压强度。这项研究的结果使我们有可能确定SCC混合物设计中最有影响力的因素。

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