Abstract
Blast-furnace slag (BFS) cement has been often used for civil engineering structures, but it has rarely been used for reinforced concrete buildings because of slow strength development. The purpose of this study is to propose BFS cement which can be widely used for concrete structures including reinforced concrete buildings. Some clinkers with high C3S contents were manufactured in a cement plant, and the effect of mineral composition of clinker on properties of BFS cement concrete was investigated. It was proved that early-age compressive strength of concrete with BFS cement was improved by increasing C3S content, especially at low temperature.
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