Optimization of the Physical and Mechanical Properties of Grouting Material for Non-Soil-Squeezing PHC Pipe Pile
文献类型：期刊论文
| 作者 | Hou, Zhenkun1,2,3; Tang, Mengxiong1; Liang, Shihua3; Zhu, Yi1 |
| 刊名 | CRYSTALS
 |
| 出版日期 | 2022 |
| 卷号 | 12期号:1页码:21 |
| 关键词 | non-soil-squeezing PHC pipe pile grouting material orthogonal test optimal ratio physical and mechanical parameters variance analysis and range analysis |
| DOI | 10.3390/cryst12010010 |
| 英文摘要 | The physical and mechanical properties of grouting materials greatly affect the friction resistance and the bearing performance of a non-soil-squeezing PHC pipe pile. Orthogonal tests for four factors at five levels were carried out to optimize the proportion of the water-cement mixture by using Portland cement as a raw material and a water-reducing agent, expansion agent and early-strength agent as additives. The following conclusions were obtained: (1) Both the water-cement ratio and the dosage of water-reducing agent are positively correlated with the fluidity of the water-cement mixture and have the greatest influence on the fluidity, followed by the expansion agent and early-strength agent. The saturation point of the water-reducing agent is 1.5%. (2) The strength of the grouting body decreases linearly with the increase of the water-cement ratio, and the dosage of the water-reducing agent has no obvious effect on the strength. As the dosage of expansion agent increases, the strength of the grouting body decreases rapidly. The expansion agent mainly plays a key role in the middle and late stages of the hardening process of the slurry. Early-strength agents have a greater impact on the early strength, but less on the later strength. When the slurry is solidified for 3 h, the early-strength agent has the greatest impact on the strength with an optimal dosage of 5%. (3) The volume of the grouting body has an inverse relationship with the water-cement ratio, and the optimal amount of expansion agent is 12%. The incorporation of an expansion agent makes the volume increase of the grouting body exceed the volume shrinkage ratio caused by the hardening of the grouting body with a curing time of more than 3 days, ensuring a slight increase in the volume of the grouting body. After 3 days, even though the effect of the expansion agent is gradually weakened, it can still ensure that the volume of the grouting body does not shrink. With the increase of the amount of water-reducing agent, the volume of the grouting body gradually decreases. When the amount of water-reducing agent exceeds 1.5%, the volume of the grouting body no longer decreases. (4) The early-strength agent has almost no effect on the volume of the grouting body. When the curing time is 3 h, the water-cement ratio has the greatest influence on the volume of the grouting body, followed by the water-reducing agent, and, finally, the expansion agent. After 3 h, the water-cement ratio still has the greatest influence, and the influence of the expansion agent gradually exceeds that of the water-reducing agent. The water-reducing agent mainly affects the volume of the grouting body in the water separation stage, and the expansion agent mainly plays a role in the middle and late stages of the slurry solidification. After optimized ratio analysis, the fluidity of the water-cement mixture can be improved, the volume shrinkage ratio rate can be lowered and the early strength can be increased. |
| 资助项目 | National Natural Science Foundation of China[52078142] ; Science and Technology Program of Guangzhou, China[202002030194] ; National Key Research and Development Program of China[2018YFC1504903] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515110836] ; Open Research Fund of State Key Laboratory of Geomechanics and Ge-otechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z019018] |
| WOS研究方向 | Crystallography ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000747556200001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34409]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Liang, Shihua |
| 作者单位 | 1.Guangzhou Inst Bldg Sci Co Ltd, Guangzhou 510440, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Guangdong Univ Technol, Sch Civil & Transportat Engn, Guangzhou 510006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, Zhenkun,Tang, Mengxiong,Liang, Shihua,et al. Optimization of the Physical and Mechanical Properties of Grouting Material for Non-Soil-Squeezing PHC Pipe Pile[J]. CRYSTALS,2022,12(1):21. |
| APA | Hou, Zhenkun,Tang, Mengxiong,Liang, Shihua,&Zhu, Yi.(2022).Optimization of the Physical and Mechanical Properties of Grouting Material for Non-Soil-Squeezing PHC Pipe Pile.CRYSTALS,12(1),21. |
| MLA | Hou, Zhenkun,et al."Optimization of the Physical and Mechanical Properties of Grouting Material for Non-Soil-Squeezing PHC Pipe Pile".CRYSTALS 12.1(2022):21. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。