Effect of coral sand on the mechanical properties and hydration mechanism of magnesium potassium phosphate cement mortar
文献类型：期刊论文
| 作者 | Liu, Hao1,2,3; Yang, Huamei4,5; Wei, Houzhen3; Yu, Jining6; Meng, Qingshan3; Yan, Rongtao1,2 |
| 刊名 | JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A
 |
| 出版日期 | 2023-06-12 |
| 卷号 | -期号:-页码:- |
| 关键词 | Magnesium potassium phosphate cement (MKPC) Coral sand (CS) Mechanical properties Corrosion resistance Hydration mechanism |
| ISSN号 | 1673-565X |
| 英文摘要 | Damaged structures on coral islands have been spalling and cracking due to the dual corrosion of tides and waves. To ensure easy access to aggregate materials, magnesium potassium phosphate cement (MKPC) and coral sand (CS) are mixed to repair damaged structures on coral islands. However, CS is significantly different from land-sourced sand in mineral composition, particle morphology, and strength. This has a substantial impact on the hydration characteristics and macroscopic properties of MKPC mortar. Therefore, in this study we investigated the compressive strength, interfacial mechanical properties, and corrosion resistance of MKPC CS mortar. Changes in the morphology, microstructure, and relative contents of hydration products were revealed by scanning electron microscope-energy dispersive spectrometer (SEM-EDS) and X-ray diffraction (XRD). The results indicated that the compressive strength increased linearly with the interfacial micro-hardness, and then stabilized after long-term immersion in pure water and Na2SO4 solution, showing excellent corrosion resistance. Compared with MKPC river sand (RS) mortar, the hydration products of CS mortar were an intermediate product 6KPO(2)center dot 8H(2)O with a relative content of 3.9% at 1 h and 4.1% at 12 h. The hydration product MgKPO4 center dot 6H(2)O increased rapidly after 7-d curing, with an increased growth rate of 1100%. Our results showed that CS promoted the nucleation and formation of hydration products of MKPC, resulting in better crystallinity, tighter overlapping, and a denser interfacial transition zone. The results of this study provide technical support for applying MKPC mortar as a rapid repair material for damaged structures on coral islands. |
| 学科主题 | Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001002399000001 |
| 出版者 | ZHEJIANG UNIV PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35444]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China 2.Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology, Guilin 541004, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 4.School of Intelligent Construction, Wuchang University of Technology, Wuhan 430002, China 5.Hydraulic Concrete Institute, China Three Gorges Corporation, Beijing 100038, China 6.The First Railway Survey and Design Institute Group Corporation, Xi’an 710043, China |
| 推荐引用方式 GB/T 7714 | Liu, Hao,Yang, Huamei,Wei, Houzhen,et al. Effect of coral sand on the mechanical properties and hydration mechanism of magnesium potassium phosphate cement mortar[J]. JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A,2023,-(-):-. |
| APA | Liu, Hao,Yang, Huamei,Wei, Houzhen,Yu, Jining,Meng, Qingshan,&Yan, Rongtao.(2023).Effect of coral sand on the mechanical properties and hydration mechanism of magnesium potassium phosphate cement mortar.JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A,-(-),-. |
| MLA | Liu, Hao,et al."Effect of coral sand on the mechanical properties and hydration mechanism of magnesium potassium phosphate cement mortar".JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE A -.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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