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首页> 外文会议>International Conference on Civil, Architectural and Hydraulic Engineering >Preparation of phosphorous slag-based cementitious material with high early strength and its concrete properties
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Preparation of phosphorous slag-based cementitious material with high early strength and its concrete properties

机译：高早强及其混凝土特性制备磷酸盐基水泥材料的制备

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The phosphorous slag-based cementitious material (PSBCM) with rapid hardening and high early strength was obtained by incorporation of graphite tailing powder, Portland cement, silica fume and mineral material A. The microstructure of hardened paste was investigated by Scanning Electron Microscope. Based on the optimal mix proportion of PSBCM, phosphorous slag-based concretes with different strength grades, i.e. C30, C40 and C50, were prepared and their physical and mechanical properties were tested. The results showed that the optimal mix proportion of PSBCM was that the content of phosphorous slag was 79%, while the contents of graphite tailings, Portland cement, mineral material A and silica fume were 5%, 9%, 5% and 2%, respectively. As the incorporation of sodium silicate (5%, Cal.as Na2O) as well as chemical A (1%) in PSBCM, the 1-d compressive strength and flexural strength of the material were 16.1 MPa and 3.5MPa, respectively, and the initial setting time was 30 min. Scanning Electronic Microscope confirmed a rapid hardening characteristic of this PSBCM and a very compact microstructure, which would endow the hardened paste with a high early mechanical property. The experiments of properties of PSBCM concretes demonstrated that these concretes has a high early strength, and the workability of PSBCM concrete was better than that of Portland cement concrete with the same strength grade.
机译：磷熔渣系胶凝材料（PSBCM）与快速硬化和高的早期强度通过石墨粉末的拖尾，波特兰水泥，硅灰和矿物材料A.硬化糊状物的微结构通过扫描电子显微镜考察掺入获得。基于PSBCM，磷熔渣系混凝土具有不同强度等级，即C30，C40和C50的最佳配比，制备和它们的物理和机械性能进行了测试。结果表明，PSBCM的最佳配比是，磷渣的含量为79％，而石墨尾矿，波特兰水泥，矿物材料A和雾化二氧化硅的含量分别为5％，9％，5％和2％，分别。硅酸钠（5％，Cal.as的Na 2 O）以及化学A（1％）在PSBCM的掺入，该材料的1-d抗压强度和抗弯强度分别为16.1兆帕，为3.5MPa，分别与初凝时间为30分钟。扫描电子显微镜证实了这一点PSBCM和一个非常紧凑的组织，这将赋予固化的膏具有高早期的机械性能的快速硬化特性。 PSBCM混凝土性能的实验表明，这些混凝土具有早期强度高，并且PSBCM混凝土的和易性，比具有相同强度等级硅酸盐水泥混凝土的更好。

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