Mechanical and abrasion resistance performance of silica fume, marble slurry powder, and fly ash amalgamated high strength self-consolidating concrete

• Published in: Construction & building materials 2021-02, Vol.269, p.121282, Article 121282
• Main Authors: Choudhary, Rakesh, Gupta, Rajesh, Nagar, Ravindra, Jain, Abhishek
• Format: Article
• Language: English
• Subjects: Environmental impact; High strength self-consolidating concrete; Mechanical properties; Microstructural analysis; Statistical approach
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2020.121282

•SF, MSP, and FA were incorporated in HSSCC mixes as potential cement substitute.•Mechanical, abrasion and microstructural performance of HSSCC mixes were assessed.•The Ca/Si ratio played an important role in the strength development.•The collective use of 10% MSP and 15% FA, with 5% SF showed excellent performance. An experimental program was conducted to evaluate the impact of silica fume (SF), marble slurry powder (MSP), and fly ash (FA) on the mechanical properties and abrasion resistance of high strength self-consolidating concrete (HSSCC). For this, Ordinary Portland Cement (OPC) was replaced by SF, MSP, and FA in various proportions in individual and simultaneous manner. Altogether sixteen numbers of concrete mixes were prepared. The mechanical properties were evaluated by performing compressive strength, split tensile strength, flexural tensile strength, pull-off strength tests. The microstructural analysis was also carried out using field emission scanning electron microscope (FESEM) and Energy-dispersive X-ray spectroscopy (EDS) techniques. Amalgamation of MSP and FA in HSSCC resulted in better mechanical performance. The combined use of SF, MSP, and FA in HSSCC at 5%, 10%, and 15%, respectively has produced the best results in terms of mechanical performance. The EDS analysis showed the effect of Ca to Si ratio in strength development and this ratio found to be crucial. A statistical approach also shows the significance of the SF, MSP, and FA on the test results.