Study on the Development of High-Strength Fiber-Reinforced Concrete with Enhanced Water Resistance for River Embankment Structures in Ho Chi Minh City

Abstract

This paper presents the research results on developing high-strength fiber-reinforced concrete aimed at improving its compressive strength, crack resistance, and water impermeability for application in river bank protection structures in Ho Chi Minh City. Five concrete mix designs were developed according to ACI 211.4R-08, combining Portland cement PCB40, Duyen Hai thermal power plant fly ash, SF-90 silica fume, and short dispersed glass fibers. The workability, mechanical, and impermeability properties of the concrete were determined according to current Vietnamese standards. Experimental results show that the concrete achieved an average compressive strength at 28 days ranging from 55,8 MPa to 68,6 MPa, flexural tensile strength from 6,25 to 7,03 MPa, and elastic modulus up to 33,2 GPa. Water absorption was below 7%, and water impermeability reached W6 to W8 according to TCVN 3116:2022. The concrete mixture exhibited high slump, remained stable over time, and showed no segregation, making it suitable for practical construction site conditions. Based on the results obtained in this study, it can be concluded that high-strength concrete reinforced with dispersed fibers is a sustainable and effective solution for riverbank structure construction in Ho Chi Minh City. At the same time, it helps reduce cement usage, utilize industrial waste, and promote environmentally friendly building materials.