Fly ash concretes by the uniaxial restraint test

This paper presents the thermal cracking sensitivity evaluation of blast furnace slag and fly ash concretes by a temperature-stress testing machine (TSTM) under full restraint, moderate and high temperature rise, and sealed curing conditions. Common mix proportions of additive admixture were experimented and compared with OPC conventional concrete for the sake of real application. Slag in high temperature rise case had a negative effect. Fly ash concrete was found to possess a better cracking resistance than the case of slag concrete.