Optimization of SCC Using Response Surface Methodology a Novel Approach

ABSTRACT Fresh Self‐consolidating concrete (SCC) has great flowability, which enables it to fill formwork entirely, flow into gaps and around obstructions, and achieve full compaction itself without exhibiting segregation or bleeding. Response Surface Methodology was utilized to mathematically model the effects and influences of four critical factors on the workability and compressive strength of SCC. The four main variables studied in this research were cement content (A), fly ash content (B), water to binder (A+B) ratio (C), and dose of superplasticizer (D). Following the development of a statistical model based on sixteen mixes, five additional mixes were utilized to validate its accuracy. The statistical model developed was valid for cement content ranging from 380 to 480 kg/m 3 , fly ash ranging from 70 to 170 kg/m 3 , w/b ratio ranging from 0.4 to 0.43, and superplasticizer ranging from 1.8% to 2% by powder mass. The key components and their total effects were calculated using the DOE. Results indicate that by utilizing 550 kg/m 3 of binder (cement+fly ash) content, it is possible to get concrete with a compressive strength of more than 30 MPa in just 28 days. This paper also attempts to manage fly ash waste to use this solid waste positively and safeguard our ecosystem.