文献类型：期刊文献

英文题名：Mechanical properties, nanoscale characteristics, and environmental analysis of high-volume waste coral powder mortar (HVCM)

作者：He, Zhi-hai[1,2];Ni, Ya-qian[1];Zhang, Yu[3];Shi, Jin-yan[3];Revilla-Cuesta, Victor[4];Hu, Yun-jin[1,2];Lu, Jun[5]

机构：[1]Shaoxing Univ, Coll Civil Engn, Shaoxing 312000, Peoples R China;[2]Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China;[3]Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Peoples R China;[4]Univ Burgos, Escuela Politecn Super, Dept Civil Engn, C Villadiego S-N, Burgos 09001, Spain;[5]Zhejiang Yongjian New Mat Technol Co Ltd, Shaoxing 312000, Peoples R China

年份：2022

卷号：407

外文期刊名：POWDER TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000866372100005)、、EI(收录号：20222512261551)、Scopus(收录号：2-s2.0-85132347657)、WOS

基金：The authors would like to acknowledge the Natural Science Foundation of Zhejiang Province (Grant No. LY20E020006), the International Scientific and Technological Cooperation Project of Shaoxing University (Grant No. 2019LGGH1009), National Natural Science Foundation of China (Grant No. 51602198) and Science and Technology R&D Project of Zhejiang Yongjian New Material Technology Co., Ltd. (Grant No. RD202008) for their financial support to the work present in this paper.

语种：英文

外文关键词：Mortar; Waste coral powder; Environmental analysis; Multiscale characteristics; Nanomechanical properties

外文摘要：With the development of marine resources, coral-based cement compositions have broad application prospects in coastal infrastructure construction such as island reef construction, flood control embankment, airport, and road, etc. Waste coral powder (CP) was used to prepare high-volume CP mortar (HVCM), and its multiscale characteristics and environmental benefits were assessed, such as strength, microstructure, and nanoscale characteristics. The results showed that with the increase of CP substitution level, the mechanical properties of HVCM decreased, and the autogenous shrinkage of the mixture was significantly improved. The use of CP to replace the high-volume cement degraded the microstructure of the samples. From the perspective of nanoscale characteristics, the incorporation of CP reduced the content of hydration phase in the matrix and increased the pore phase. Meanwhile, the widening of the interfacial transition zone of the HVCM samples was also the main reason for their performance degradation. Although the incorporation of CP decreased the average elastic modulus of C-S-H and increased its total porosity, the pore structure of the gel was slightly refined. In addition, HVCM had lower carbon emissions and consumption of non-renewable energy compared to plain mortar.