| 引用本文: | 延常玉,李宏波,张虎彪,等.水泥粉煤灰炉渣煤矸石混合料的力学性能试验研究[J].灌溉排水学报,0,():-. |
| yanchangyu,lihongbo,zhanghubiao,et al.水泥粉煤灰炉渣煤矸石混合料的力学性能试验研究[J].灌溉排水学报,0,():-. |
|
| 摘要: |
| 【目的】为研究水泥粉煤灰稳定炉渣-煤矸石混合料的力学性能,解决宁夏地区粉煤灰、炉渣和煤矸石等工业废渣大量堆积的问题。【方法】开展不同掺量(3%、4%、5%、6%)水泥粉煤灰稳定不同掺量(0%、25%、50%、75%、100%)炉渣-煤矸石混合料的强度试验、三轴试验和超声波试验,在此基础上,进行了5%掺量水泥50%掺量炉渣混合料的微观机理分析。【结果】炉渣替代率的增加会降低混合料的强度,而水泥掺量的增加会增大混合料的强度；建立了试件的无侧限抗压强度和劈裂强度的关系模型；在三轴试验中,试件的破坏形态受围压影响较大且表现为典型的剪切破坏；根据试验结果,拟合得到了炉渣替代率、水泥掺量与峰值应力和围压之间的关系公式；根据扫描电镜检测结果,发现试件的主要水化产物为C-S-H、AFt等；根据超声波试验结果,试件的无侧限抗压强度与振幅之间呈正相关性。【结论】因此,将粉煤灰、炉渣和煤矸石混合料用作大坝和路面基层铺筑可行,为粉煤灰、炉渣和煤矸石混合料的工程应用提供参考。 |
| 关键词: 破坏形态;力学性能;关系模型;三轴试验;微观机理 |
| DOI： |
| 分类号:U416.25 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
|
| Experimental study on mechanical properties of cement fly ash slag coal gangue mixes |
|
yanchangyu, lihongbo, zhanghubiao, zhangxuanshuo, yanpengfei
|
|
Ningxia University
|
| Abstract: |
| 【Objective】 To study the mechanical properties of cement fly ash stabilized slag-coal gangue mixture and to solve the problem of large accumulation of industrial waste slag such as fly ash, slag and coal gangue in Ningxia area. 【Method】 The strength test, triaxial test and ultrasonic test of cement fly ash stabilized with different doping amounts (3%, 4%, 5%, 6%) of slag-coal gangue mixture with different doping amounts (0%, 25%, 50%, 75%, 100%) were carried out. 【Result】 The relationship between unconfined compressive strength and splitting strength of the specimens was established; in the triaxial test, the damage pattern of the specimens was influenced by the surrounding pressure and showed a typical shear damage; according to the test results, the relationship equations between slag substitution rate, cement dosing and peak stress and surrounding pressure were fitted; according to the results of scanning electron microscopy, the main hydration products of the specimens were found to be C-S-H, AFt, etc.; according to the ultrasonic test results, the unconfined compressive strength of the specimens showed a positive correlation with the amplitude. 【Conclusion】 Therefore, it is feasible to use fly ash, slag and coal gangue mixes as dam and pavement subgrade paving, which provides reference for the engineering application of fly ash, slag and coal gangue mixes. |
| Key words: damage morphology; mechanical properties; relational model; triaxial test; microscopic mechanism |
