Effects of slag type and curing method on the performance of expansive concrete. (30th November 2020)

• Record Type: Journal Article
• Authors: Nguyen, Hoang Viet; Nakarai, Kenichiro; Pham, Kien Hoang; Kajita, Saeko; Sagawa, Takahiro
• Is Part Of: Construction & building materials. Volume 262(2021)
• Publication Date: 2020-11-30
• Subjects: Slag concrete -- Expansive concrete -- Steam curing -- Compressive strength -- Volumetric change -- Air permeability -- Water sorptivity; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2020.120422
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Performance of pure slag and gypsum slag concretes under different curing temperature were comprehensively evaluated. Strength, volumetric change, permeability, and water sorptivity were investigated. Concrete performance was improved when incorporating slag with gypsum. Steam curing enhanced early strength but worsened later properties of the 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.