Influence of stone powder content and particle size on the strength of cement-treated clay
Influence of stone powder content and particle size on the strength of cement-treated clay
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DOI：
10.1016/j.conbuildmat.2021.124710
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发表时间：
2021-10
影响因子：
7.4
通讯作者：
Joyce Nakayenga;Arlyn Aristo Cikmit;T. Tsuchida;T. Hata
中科院分区：
文献类型：
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作者：
Joyce Nakayenga;Arlyn Aristo Cikmit;T. Tsuchida;T. Hata
外加剂的粒径大小会影响水泥-粘土反应，从而降低强度。研究了5种粒径（A、B、C、D和E：分别为> 75、40 - 75、20 - 40、<20和<1 - 106 μ m）的废弃花岗岩粉在水泥土混合复合材料中的作用。研究了水泥土的液限、无侧限抗压强度和微观结构特征。粒径大小对单颗粒抗压强度的影响顺序为D> A> C> B，且D的单颗粒抗压强度高于对照样品。UCS的增加是由于石粉D的表面积和火山灰反应性的增加。与添加30%石粉的对照样品相比，水泥处理的粘土-石粉E复合材料的UCS发生降低，并且在添加50%和70%时观察到相等或改善的强度。由于石粉能提高水泥的抗压强度，可减少28.6%的水泥用量。
Particle size of additive geomaterials could affect the cement–clay reaction, thereby reducing strength. The effects of five particle sizes (A, B, C, D and E: >75, 40–75, 20–40, <20 and < 1–106 µm, respectively) of waste granite powder in cement-treated clay mixed composites were investigated. The effects on the liquid limit, unconfined compressive strength (UCS) and microstructural characteristics were investigated. The particle size influenced the UCS in the order of D > A > C > B, and D exhibited higher UCS than the control sample. The increase in the UCS was due to the increased surface area and pozzolanic reactivity of stone powder D. A reduction in the UCS of cement-treated clay–stone powder E composites occurred as compared to the control sample with a 30% stone powder addition, and equal or improved strength was observed with 50% and 70% additions. Owing to the UCS increment derived from stone powder, we could reduce 28.6% of the cement.