Effects of slag type and curing method on the performance of expansive concrete

Abstract Blast furnace slag is extensively used as a supplementary cementitious material to improve the performance of concrete. However, shrinkage and early cracking are common in such slag concretes, so expansive concrete has been applied as a countermeasure. This study investigated the impact of slag types on the engineering properties of expansive concrete. The results indicate that pure slag impaired concrete performance, whereas outstanding improvement in performance was observed when using slag with gypsum. The results of this study can be used to provide improved concrete mix and curing design when using blast furnace slag in expansive concrete.