USE OF MODIFIED ANDREASEN MODEL FOR LOW CEMENT CONCRETE OF MEDIUM STRENGTH

Abstract

Concrete usage has tremendously increased in the past few decades with cement being the 2^nd most widely used material next to water. Cement and concrete industry is alone responsible for more than 5% of global anthropogenic CO₂ emissions. With global pressure mounting for fighting climate change requires an ever increasing need to optimize concrete mix proportions to reduce cement consumption whilst maintaining durability. Optimization of concrete mix proportion over the decades has been achieved with the help of various particle packing models. The aim of the paper is to study the effect on strength and durability of mixes optimized using Modified Andreasen Particle Packing Model with cement content lower than specified by building codes. The results on strength and durability of optimized mix were compared with convention concrete mix. It was found that concrete mixes optimized by Modified Andreasen Model performed better if not worse than conventional ACI concrete mix with fly ash, although prepared with significantly lower cement content.