Influence of mineral admixtures on the mechanical property and durability of waste oyster shell mortar

被引：0
作者：
Liao Y. [1 ,2 ,3 ]
Wang X. [1 ]
Feng J. [1 ,4 ]
Meng Y. [1 ]
Chen D. [1 ,2 ,3 ]
Da B. [1 ,2 ,3 ]
机构：
[1] College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing
[2] Key Laboratory of Coastal Disaster and Defence of Ministry of Education, Hohai University, Nanjing
[3] Yangtze Institute for Conservation and Development, Hohai University, Nanjing
[4] Nanjing R&D High-Tech Co. Ltd., Nanjing
来源：
Journal of Southeast University (English Edition) | 2023年 / 39卷 / 03期
基金：
中国国家自然科学基金;
关键词：
crushed waste oyster shell (WOS) mortar; durability; ecological; economic benefits; mechanical property; workability;
D O I：
10.3969/j.issn.1003-7985.2023.03.008
中图分类号：
学科分类号：
摘要：
To mitigate the environmental pollution caused by aquatic waste, crushed waste oyster shell (WOS) was added as an aggregate to the mortar. The impact of varying dosages (0%, 20%, 30%, and 40%) of fly ash (FA) / slag powder (SG) and curing periods on the workability, mechanical properties, and durability of the resulting mixtures were investigated. Furthermore, the ecological and economic benefits of WOS mortars were examined. The findings reveal that the compressive strength and static modulus of elasticity in WOS mortar decreased moderately after adding the mineral admixture during the initial curing phase. However, the mechanical properties of WOS mortar improved upon extending the curing period. Additionally, the partial replacement of cement with FA / SG promoted the migration ability of chloride and minimized the drying shrinkage in WOS mortars. In scenarios where engineering application requirements are satisfied, the utilization of WOS mortar could reduce CO2 emissions by 29% . © 2023 Southeast University. All rights reserved.
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页码：277 / 283
页数：6
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