Ahmed Aliyu Azare, Ibrahim M. H. Wan, Abdullah Faisal Alshalif, Ramadhansyah Putra Jaya, Nindyawati Nindyawati
This paper focuses on high-strength self-compacting concrete (HSSCC) characteristics with the optimal percentages of cement replacers, fly ash, and silica fume. The aim is to analyze the different proportions of HSSCC mixes to evaluate and establish their durability. In the initial part of the study, the maximum proportion of these materials the system should include was calculated with the help of the statistical software Minitab. Then, variable silica fume, fly ash, and W/C ratio functions were investigated using response surface methodology at Minimum, Medium, and Maximum levels. The method of RSM made it possible to identify the composition sets of silica fume, fly ash, and W/C ratio to further assess the possibility of simultaneous optimization. These aspects entailed fresh properties’ verification, slump flow, T500, J-ring, segregation resistance, and compressive strength on newly incorporated properties. The research was undertaken with cement replacements by 05% silica fume, 10% and 15%silica fume, and 20 % and 30% fly ash. Mechanical characteristics such as compressive strength, tensile strength, flexural strength, and properties related to durability, such as water absorption and porosity, were also studied. It was also observed that the best-performing mix was obtained with 5% silica fume and 20% fly ash by the quantity of cement with a water-binder ratio of 0.33. This mixture had the best mechanical properties and the maximum compressive strength, which increased by 27% compared to the essential mix containing only OPC. Furthermore, the porosity and water absorption were reduced by 50% and 55%, respectively, compared to the identical standard mix. Therefore, this HSSCC mix can improve the concrete performance to an extent. © 2024, Penerbit UTHM. All rights reserved.
Department of Civil Engineering, Faculty of Civil Engineering & Built Environment, Universiti Tun Hussein Onn Malaysia, Johor, Parit Raja, 86400, Malaysia; Air Force Institute of Technology Kaduna, Nigeria; Faculty of Civil Engineering and Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, Pahang, Gambang, 26300, Malaysia; Department of Civil Engineering and Planning, Faculty of Engineering, State University of Malang, Malang, Indonesia
