Pozzolans' Effect on Durability of Light Concretes Made of LECA (Light Expanded Clay Aggregate) and Scoria in Corrosive Environments Containing Sulfuric acid

Abstract

In the recent years numerous structures were made by using light concrete in their structures. The enhancement of resistance of light weight aggregates from one side, and weight loss of lightweight aggregates as well as the possibility of overproduction lead to an impressive increase in building structures by using light weight aggregates. In this research light weight concretes made of light weight aggregates of LECA and scoria containing the pozzolans of silica fume, Metakaolin, rice husk ash, poly propylene fibers with different percentages have been used and examined. After putting light weight concrete samples in acidic places containing sulfuric acid or PH=3, PH=5, PH=7 in the period of 180 days then the effect of this environment on the pushing resistance and the weight of these samples are analyzed. Results show that the concretes containing pozzolans have the better performance in comparison to the concretes which are produced without pozzolans and also the damage to light weighted aggregates concretes in acidic environments is more than regular concretes.