Influence of stone powder content and particle size on the strength of cement-treated clay. (25th October 2021)

• Record Type: Journal Article
• Authors: Nakayenga, Joyce; Cikmit, Arlyn Aristo; Tsuchida, Takashi; Hata, Toshiro
• Is Part Of: Construction & building materials. Volume 305(2021)
• Publication Date: 2021-10-25
• Subjects: CBR California bearing ratio -- UCS unconfined compressive strength -- CSH calcium silicate hydrate -- CAH calcium aluminate hydrate -- CASH calcium aluminate silicate hydrate -- MIP mercury intrusion porosimetry -- XRD X-ray diffraction -- ITZ interfacial transition zone -- SEM scanning electron microscopy -- EDX energy-dispersive X-ray spectroscopy -- TG-DTA thermogravimetric and differential thermal analysis; Clays -- Industrial wastes -- Particle size -- Soil stabilisation -- Stone powder; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2021.124710
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Stone powder increased the unconfined compression strength of cement-treated clay. The strength depended on the particle size of stone powder. The amount of cement used per cubic metre of cement-treated soil can be reduced. 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, <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.