Study on concrete mix proportions using mineral admixtures and temperature rising inhibitors for mass concrete structures in traffic works

Abstract

In mass concrete structures, in addition to temperature control to prevent thermal cracking, ensuring the design strength is of paramount importance. Along with the advancement of the construction industry, concrete admixture technology has continuously evolved to improve the properties of concrete for various applications. Within the scope of this study, the authors evaluate the effects of a blended admixture consisting of fly ash, ground granulated blast-furnace slag (GGBFS), and a temperature rising inhibitors (TRI) on the strength development of concrete used in transportation structures. The experimental design method was employed, with fly ash content varying from 15% to 35%, GGBFS from 15% to 40%, and TRI from 0.3% to 1%. The results produced mathematical regression equations, in which the objective functions were the compressive strengths at 3 days (R_n3), 7 days (R_n7), and 28 days (R_n28), determined by the independent variables of fly ash, GGBFS, and inhibitor content. Based on these findings, an appropriate concrete mix proportion can be established for the construction of mass concrete structures in traffic works.