Novel ternary blends of Type 1 Portland cement, residual rice husk ash, and limestone powder to improve the properties of self-compacting concrete. (30th October 2016)

• Record Type: Journal Article
• Authors: Sua-iam, Gritsada; Sokrai, Prakasit; Makul, Natt
• Is Part Of: Construction & building materials. Volume 125(2016)
• Page Start: 1028
• Page End: 1034
• Publication Date: 2016-10-30
• Subjects: Ternary blends of cementitious materials -- Self-compacting concrete -- Residual rice husk ash -- Limestone powder -- Rheology -- Strength; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2016.09.002
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Novel ternary blends of cementitious materials (TCM) are investigated. TCM comprise Portland cement, residual rice husk ash, and limestone powder. Self-compacting concrete (SCC) prepared using TCM satisfies EFNARC requirements. TCM investigated showed greater mechanical properties, more than 40 MPa at 28 days. TCM is shown to be a low-cost way of improving the mechanical properties of SCC. Abstract: We investigated the use of novel ternary blends of cementitious materials (TCM) (Type 1 Portland cement (OPC) with residual rice husk ash (RHA) and limestone powder (LS)) to improve the fresh and mechanical properties of self-compacting concrete (SCC). The SCC mixtures were designed using a constant water/TCM ratio of 0.28 by weight, a TCM content of 450 kg/m 3, and an OPC replacement percentage of 0 or 20 wt.%. of TCM. We systematically investigated the fresh and hardened properties including unit weight, slump flow diameter, slump flow time, J-ring flow, V-funnel flow time, L-box, ultrasonic pulse velocity (UPV), and compressive strength. The test results clearly showed that the ternary (PC + RHA + LS) systems satisfy EFNARC requirements and produce SCC that has significantly better workability than does conventional SCC. The TCMs resulted in greater mechanical properties than was the case for the conventional SCC: with TCM replacing cement, more than 40 MPa at 28 days can be achieved and 13% higher compressive strength than that of conventional SCC.