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Sustainable cementitious material with ultra-high content partially calcined limestone-calcined clay
Highlights A novel strategy for producing the unique core–shell structure was proposed. The sustainable cementitious material with ultra-high content partially calcined limestone-calcined clay was developed. The formation of a dense layer of hydration products, resulting in a significant increase in compressive strength and a significant decrease in the porosity of cementitious materials. The newly developed sustainable cementitious material could reduce CO2 emission by 45.1% and energy consumption by 58.3% compared with OPC.
Abstract The application of calcined clay and limestone powder in cementitious materials to partially substitute ordinary Portland cement is regarded to be highly potential for developing sustainable green building materials. However, with the increase in substitution level, the major drawbacks include the slow development of the early strength and the decrease of the later strength. In this study, the limestone is partially calcined to form the core–shell structure with loose calcium oxide on the outside and dense calcium carbonate on the inside, and sustainable cementitious material with ultra-high content partially calcined limestone and calcined clay (substitution level is up to 80%) is developed. It is evident from this study that the core–shell structure of partially calcined limestone promotes the formation of a dense layer of hydration products. The incorporation of partially calcined limestone exhibits significant advantages in enhancing the reaction of calcined clay and improving the strength development of the cementitious materials that are 90% and 137% higher than that with the limestone-calcined clay at 7d and 28d, respectively.
Sustainable cementitious material with ultra-high content partially calcined limestone-calcined clay
Highlights A novel strategy for producing the unique core–shell structure was proposed. The sustainable cementitious material with ultra-high content partially calcined limestone-calcined clay was developed. The formation of a dense layer of hydration products, resulting in a significant increase in compressive strength and a significant decrease in the porosity of cementitious materials. The newly developed sustainable cementitious material could reduce CO2 emission by 45.1% and energy consumption by 58.3% compared with OPC.
Abstract The application of calcined clay and limestone powder in cementitious materials to partially substitute ordinary Portland cement is regarded to be highly potential for developing sustainable green building materials. However, with the increase in substitution level, the major drawbacks include the slow development of the early strength and the decrease of the later strength. In this study, the limestone is partially calcined to form the core–shell structure with loose calcium oxide on the outside and dense calcium carbonate on the inside, and sustainable cementitious material with ultra-high content partially calcined limestone and calcined clay (substitution level is up to 80%) is developed. It is evident from this study that the core–shell structure of partially calcined limestone promotes the formation of a dense layer of hydration products. The incorporation of partially calcined limestone exhibits significant advantages in enhancing the reaction of calcined clay and improving the strength development of the cementitious materials that are 90% and 137% higher than that with the limestone-calcined clay at 7d and 28d, respectively.
Sustainable cementitious material with ultra-high content partially calcined limestone-calcined clay
Qian, Xiong (author) / Ruan, Yunxing (author) / Jamil, Tariq (author) / Hu, Chuanlin (author) / Wang, Fazhou (author) / Hu, Shuguang (author) / Liu, Yunpeng (author)
2023-02-27
Article (Journal)
Electronic Resource
English
Limestone Calcined Clay as Potential Supplementary Cementitious Material—An Experimental Study
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