Macroscopic and microscopic trans-scale characteristics of pore structure of mine grouting materials
| Autor: | Jian-hua Hu, Shao-wei Ma, Qifan Ren, Zhouquan Luo, Junlong Shang, Yuan-jian Jiang, Quan Jiang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Scale (ratio) Capillary action Metals and Alloys 02 engineering and technology Pore interconnectivity 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure Positive correlation 01 natural sciences Curing time 0103 physical sciences Spectral dimension Materials Chemistry Composite material 0210 nano-technology Porosity |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 29:1067-1081 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(19)65015-6 |
| Popis: | The pore structure and porosity of three kinds of mine grouting materials were characterized based on a thin-section analysis and low-field nuclear magnetic resonance (NMR) technique. The macroscopic pore interconnectivity was investigated using binary images captured from thin sections and a random walk pore spectral dimension (RWPSD) algorithm. The experimental results show that the microstructure of the grouting materials used consisted of interlayer pores, gel pores, capillary pores, circular air holes, and small fractures, and tailings can fill some gaps in the hydration product structure and dense hydration products. There is a positive correlation between pore interconnectivity and curing time. In addition, there is a relationship between pore interconnectivity and porosity. With increasing porosity and pore interconnectivity, a non-uniform pore structure occurs in mine grouting materials with an accelerator and results in reduced setting time and later strength. |
| Databáze: | OpenAIRE |
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