Influence of mineral admixtures on the performance of C55 machined sand concrete
Based on the consideration of raw material properties,technical requirements and practical applications,a reasonable admixture composition scheme was determined,and the flow performance,plastic viscosity and compressive strength of concrete were investigated through the orthogonal design of C55 machine-made sand concrete.The results show that the admixture affects the working performance of concrete,in which the stone powder can significantly affect the concrete pouring time;there is a close re-lationship between viscosity and working performance indicators,combined with the multi-factor linear regression analysis proposed viscosity prediction method based on the working performance;the addition of mineral admixtures has varying degrees of impact on the compressive strength of concrete at different ages,and there is a good correlation between the type and dosage of mineral ad-mixtures and the 7 d compressive strength of concrete.
mineral admixturemachined sand concreteworkabilityplastic viscositycompressive strength