Paper Key : IRJ************185
Author: Madankumar,S Bhavanishankar
Date Published: 02 Jul 2024
Abstract
The study focuses on the influence of mineral admixtures and polypropylene fiber on the strength and sulfate resistance of SCC. The research includes a comprehensive experimental study to assess the fresh and hardened properties of SCC mixtures with varying proportions of mineral admixtures and constant proportion of polypropylene fibers. The study included eight types of mix proportions, with the first four mixes excluding fibers and the remaining four incorporating 0.2% polypropylene fibers by the weight of the binder content. The waterbinder ratio was determined to be 0.32 by weight. The control mixture included only OPC as the binder while the remaining mixtures incorporated Quaternary (OPC + FA + GGBS + SF) cementitious blends in which a proportion of 50% OPC was replaced with the mineral admixtures. The replacement ratios for both FA and GGBS were 10, 20, and 30% while those of SF of 10% by mass of total cementitious materials. The 15% strength of sodium sulfate solution is used for the durability test. The results showed that inclusion of fly ash improves; however, polypropylene fiber decreases the workability of concrete. The findings suggest that the addition of mineral admixtures such as FA, GGBS, and SF along with polypropylene fibers, can enhance the durability and strength of SCC against sulfate attack. The incorporation of SCM significantly enhances the resistance of concrete to sulfate attack. Substituting GGBS in quaternary mixes notably improves sulfate resistance and strength compared to the control. The results indicate that the addition of polypropylene fibers improves the resistance of concrete mixes to sodium sulfate exposure, leading to significant improvements in strength compared to mixes without fibers. Overall, the study emphasizes the benefits of using mineral admixtures and polypropylene fibers in SCC to enhance its strength, durability, and resistance to sulfate attack. And overall conclusions are drawn based on experimental results.