| 粉煤灰对水泥土强度及固化过程的影响 |
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| 引用本文： | 陈三姗、陈峰.粉煤灰对水泥土强度及固化过程的影响[J].福建工程学院学报,2021,0(1):61-67. |
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| 作者姓名： | 陈三姗、陈峰 |
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| 作者单位： | 福建江夏学院 |
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| 摘 要： | 从粉煤灰-水泥相互作用、粉煤灰-淤泥质土相互作用两个方面开展一系列试验，研究粉煤灰对水泥和淤泥质粘土的强度及固化过程的影响，然后通过扫描电镜(SEM)试验，观察粉煤灰水泥土的微结构变化以探究其机理。粉煤灰水泥石强度试验表明粉煤灰能使水泥石28d及以上龄期的强度提高，粉煤灰淤泥质土的含水率试验和固结不排水试验表明，粉煤灰使淤泥土的硬度变大，X射线衍射(XRD)试验表明粉煤灰能细化水泥中Ca(OH)2晶粒，SEM试验结果表明粉煤灰可以使水泥土的微结构更加密实。
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| 关 键 词： | 水泥土 粉煤灰 固化机理 微观分析 强度 |
Effects of fly ash on the strength and solidification process of cement soil |
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| CHEN Sanshan,CHEN Feng.Effects of fly ash on the strength and solidification process of cement soil[J].Journal of Fujian University of Technology,2021,0(1):61-67. |
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| Authors: | CHEN Sanshan CHEN Feng |
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| Institution: | Coordinative Innovation Center for Environment-Friendly and Energy-Saving High-Performance Concrete |
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| Abstract: | A series of experiments were carried out considering fly ash-cement interaction and fly ash-silty soil interaction to study the effects of fly ash on the strength and solidification process of cement and silty soil. Then the microstructure changes of fly ash cement soil were observed to explore its mechanism through scanning electron microscope (SEM) tests. The strength test of fly ash cement stones shows that the strength of cement stones at 28 d and above were improved by adding fly ash. The moisture content test of fly ash-silty soil and its consolidated undrained test show that the mixed soil became harder. The X-ray diffraction (XRD) test shows that fly ash could refine the Ca(OH)2 crystal grains in cement. SEM test results show that the microstructure of cement soil became more compact by adding fly ash. |
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| Keywords: | cement soil fly ash solidification mechanism micro-analysis strength |
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