DESIGN AND DEVELOPMENT OF CEMENT WITH INCREASED MINOR ADDITIONAL CONSTITUENTS AND ALUMINATE PHASE～PART 1：QUALITY EVALUATION OF CEMENT～

Abstract

Increasing minor additional constituents in ordinary Portland cement （OPC） is one of the approaches for reducing the CO₂ emissions of the cement industry. However, it reduces the amount of waste use as a result of reducing the clinker ratio of cement. Therefore, it is important to maintain quality of cement concrete and the amount of waste use even after the increase of minor additional constituents. The purpose of this study is to achieve both CO₂ emissions reduction and waste use levels conservation. In this study, we widely investigated the influence of increasing minor additional constituents and aluminate phase on the quality of cement. As a result, it is possible to reduce CO₂ emissions and maintain the amount of waste use while conserving the quality of the cement by increasing the amount of aluminate in the base cement by 1 to 2％ compared to the current OPC and increasing minor additional constituents to 10％.