Influence of stone powder content and particle size on the strength of cement-treated clay

• DOI: 10.1016/j.conbuildmat.2021.124710
• Publication Date: 2021-09-02T16:27:56Z
• Authors: Joyce Nakayenga; Arlyn Aristo Cikmit; Takashi Tsuchida; Toshiro Hata
• Keywords: Specific surface area; Pozzolanic reaction; Particle (ecology)

Abstract 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, 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.