A review on use of limestone powder in cement-based materials: Mechanism, hydration and microstructures. (30th August 2018)

• Record Type: Journal Article
• Authors: Wang, Dehui; Shi, Caijun; Farzadnia, Nima; Shi, Zhenguo; Jia, Huangfei; Ou, Zhihua
• Is Part Of: Construction & building materials. Volume 181(2018)
• Page Start: 659
• Page End: 672
• Publication Date: 2018-08-30
• Subjects: Limestone powder -- Action mechanism -- Hydration process -- Hydration products -- Microstructure; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2018.06.075
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: The action mechanism of limestone powder includes four effects. The physical effect of limestone powder depends on its particle size and amount. The chemical effect of limestone powder relies on the alumina content. Abstract: Limestone powder (LS) has been widely used in cement-based materials; and reportedly, can influence their properties by filler, nucleation, dilution and chemical effects. The action mechanism of LS mainly depends on its particle size and amount. The filler effect of LS refines the microstructure and reduces the porosity of cement-based materials. Its nucleation effect accelerates the hydration of C3 S, increases the amount of hydration products and reduces the porosity of cement-based materials at early ages. Its dilution effect reduces the hydration peak of C3 S, decreases the amount of hydration products and increases the porosity of cement-based materials. Its chemical effect promotes the appearance of third hydration peak, forms carboaluminate and reduces the porosity of cement-based materials.