Study on the Hydration Behaviour of the Coral Sand Powder-Ground-Granulated Blast Furnace Slag-Portland Cement Ternary System

Renwang Nie, Haonan Wang, Zhuqing Yu, Xiaodong Shen

Research output: Contribution to conferencePaperpeer-review

Abstract

Recently, the studies on the application of coral sand in concrete construction attracted wide attention, especially in China. Coral sand and coral sand powder (CSP) can be used as fine aggregate and mineral admixture in concrete, respectively. The main component of CSP is calcium carbonate (CaCO3), up to 96%. However, the utilization of CSP in cement mortar will cause performance degradation. Ground-Granulated Blast Furnace Slag (BFS) be used to improve the property of CSP-Portland cement mortar. In this study, the coral sand powder-blast furnace slag-Portland cement (CSP-BFS-PC) ternary system had been used to produce cement paste and mortar. The hydration product of the CSP-BFS-PC ternary system are researched fundamentally by X-ray diffraction, and compressive strength are tested at different curing age. The results show that CSP can suppress consumption of C3A. 15wt.% BFS can offset the strength loss of cement mortar due to the substitution of CSP for cement (CSP less than 15wt.%), especially 7-28 days.

Original languageEnglish
StatePublished - 2022
Event7th International Conference on Durability of Concrete Structure, ICDCS 2022 - Jinan, China
Duration: 20 May 202222 May 2022

Conference

Conference7th International Conference on Durability of Concrete Structure, ICDCS 2022
Country/TerritoryChina
CityJinan
Period20/05/2222/05/22

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