Effect of magnesium phosphate cement on the mechanical properties and microstructure of recycled aggregate and recycled aggregate concrete
文献类型：期刊论文
| 作者 | Chen, Xuyong; Xiao, Xuehao; Wu, Qiaoyun; Cheng, Ziyang; Xu, Xiong; Cheng, Shukai; Zhao, Rixu |
| 刊名 | JOURNAL OF BUILDING ENGINEERING
 |
| 出版日期 | 2022-04-01 |
| 卷号 | 46 |
| 关键词 | Recycled aggregate concrete Magnesium phosphate cement Modified recycled aggregate Mechanical properties Microstructure |
| 英文摘要 | This paper aims to investigate the effects of magnesium phosphate cement (MPC) on the mechanical properties and microstructure of recycled aggregates (RA) and recycled aggregate concrete (RAC). Two surface modification methods, namely, the MPC wet and dry mix methods, were designed and applied to improve physical properties of RA, respectively. Further, the mechanical properties of the RAC mixes with modified RA (MRA) were assessed in terms of compressive, splitting tensile strength, and elastic modulus. In addition, X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDS) were carried out to illustrate the effects of surface modification methods on the microstructure of RAC. The results indicated that the MPC dry mix method shows more appropriate on the quality enhancement of RA compared to MPC wet mix method, improving the apparent density, specific gravity, water absorption, and the crushing value of RA by 3.6%, 7.4%, 26.7%, and 3.0%, respectively. Meanwhile, the corresponding mechanical properties of the concrete are enhanced, particularly the compressive strength getting increased by up to 41.5%, due to the new hydration reactions. Based on the microstructural analyses, the coarse surface of RA is changed more homogeneous and denser when modified by MPC, and the MPC is observed at both interfacial sides of recycled aggregate mortar and fresh concrete mortar for the reinforcement of the interfacial strength between the new and old mortar. |
| 学科主题 | Construction & Building Technology ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000772707900003 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34986]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Wuhan Institute of Technology; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Chen, Xuyong,Xiao, Xuehao,Wu, Qiaoyun,et al. Effect of magnesium phosphate cement on the mechanical properties and microstructure of recycled aggregate and recycled aggregate concrete[J]. JOURNAL OF BUILDING ENGINEERING,2022,46. |
| APA | Chen, Xuyong.,Xiao, Xuehao.,Wu, Qiaoyun.,Cheng, Ziyang.,Xu, Xiong.,...&Zhao, Rixu.(2022).Effect of magnesium phosphate cement on the mechanical properties and microstructure of recycled aggregate and recycled aggregate concrete.JOURNAL OF BUILDING ENGINEERING,46. |
| MLA | Chen, Xuyong,et al."Effect of magnesium phosphate cement on the mechanical properties and microstructure of recycled aggregate and recycled aggregate concrete".JOURNAL OF BUILDING ENGINEERING 46(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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