粉煤灰-水泥浆液物性响应及演化特征研究  

Study on Physical Response and Evolution Characteristics of Fly Ash Cement Slurry

作　　者：娄杰 孙庆华 谷超 孙强 LOU Jie;SUN Qinghua;GU Chao;SUN Qiang(National Energy Group Coal Coking Co.,Ltd.,Wuhai 016000,China;College of Geology and Environment,Xi’an University of Science and Technology,Xi’an 710054,China;School of Coal Engineering,Shanxi Datong University,Datong 037003,China)

机构地区：[1]国家能源集团煤焦化有限责任公司,内蒙古乌海016000 [2]西安科技大学地质与环境学院,陕西西安710054 [3]山西大同大学煤炭工程学院,山西大同037003

出　　处：《粉煤灰综合利用》2024年第5期1-5,10,共6页Fly Ash Comprehensive Utilization

基　　金：国家自然科学基金资助项目(41972288)。

摘　　要：粉煤灰-水泥浆材因其优良的工程性能在隧道、公路加固、堵水方面有良好的应用前景。通过测定不同配比粉煤灰-水泥注浆材料的波速、电阻率、T_(2)谱,研究其在密封状态下各参数变化特征及演化机理。结果表明:波速、电阻率与龄期呈正相关,含水量反之。随着水灰比、含水率增大,水化反应程度减小,电阻率、波速呈减小趋势。粉煤灰掺量增大,1、7 d时,粉煤灰对水化反应具有抑制作用,耗水量减小,含水率随之增大,波速、电阻率分别与之呈负相关、正相关;14、28 d,粉煤灰活性反应增强,促进了水化反应,0.5水灰比注浆材料的电阻率、波速随粉煤掺量变化趋势与先前相反,但0.7、0.9水灰比试样的波速、电阻率随粉煤掺量增加分别呈先上升后下降、先下降后上升的趋势。研究成果为注浆材料的研发与工程应用提供一定的参考价值。Because of its excellent engineering performance,fly ash-cement slurry has a good application prospect in the reinforcement and water plugging of tunnels and highways.By measuring the wave velocity,resistivity and T_(2) spectrum of different proportions of fly-ash cement grouting materials,the variation characteristics and evolution mechanism of each parameter in sealed state were studied.The results indicate that wave velocity and resistivity are positively correlated with age,while water content is inversely correlated.As the water cement ratio and water content increase,the degree of hydration reaction decreases,and the resistivity and wave velocity show a decreasing trend.When the dosage of fly ash increases,at 1 and 7 days,fly ash has an inhibitory effect on hydration reaction,reducing water consumption and increasing water content.Wave velocity and resistivity are negatively and positively correlated with it,respectively.At 14 and 28 days,the active reaction of fly ash was enhanced,promoting the hydration reaction.The change trend of the resistivity and wave velocity of the 0.5 water cement ratio grouting material with the addition of fly ash was opposite to before.But for the 0.7 and 0.9 water cement ratio samples,the wave velocity and resistivity showed a trend of first increasing and then decreasing,and then increasing,respectively.The research results provide some reference value for the research and development and engineering application of grouting materials.

关 键 词：粉煤灰 核磁T_(2)谱 波速 电阻率 

分 类 号：TU528[建筑科学—建筑技术科学]