譜,研究其在密封狀態(tài)下各參數(shù)變化特征及演化機理。結(jié)果表明:波速、電阻率與齡期呈正相關(guān),含水量反之。隨著水灰比、含水率增大,水化反應(yīng)程度減小,電阻率、波速呈減小趨勢。粉煤灰摻量增大,1、7d時,粉煤灰對水化反應(yīng)具有抑制作用,耗水量減小,含水率隨之增大,波速、電阻率分別與之呈負(fù)相關(guān)、正相關(guān);14、28d,粉煤灰活性反應(yīng)增強,促進了水化反應(yīng),0.5水灰比注漿材料的電阻率、波速隨粉煤摻量變化趨勢與先前相反,但0.7、0.9水灰比試樣的波速、電阻率隨粉煤摻量增加分別呈先上升后下降、先下降后上升的趨勢。研究成果為注漿材料的研發(fā)與工程應(yīng)用提供一定的參考價值。-龍源期刊網(wǎng)" />

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粉煤灰-水泥漿液物性響應(yīng)及演化特征研究

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LOU Jie',SUN Qinghua’,GU Chao , SUN Qiang2 (1. National Energy Group Coal Coking Co.,Ltd.,Wuhai O160OO ,China;2. Collge of Geology and Environment,Xi'an University of Science and Technology,Xi’an 71OO54,China; 3. School of Coal Engineering, Shanxi Datong University,Datong O37OO3,China)

Abstract:Becauseof itsexcellentengineeringperformance,flyash-cementslurryhasagoodapplicationprospect inthe reinforcement and water plugging of tunnels and highways.By measuring the wave velocity,resistivity and spectrum of different proportions offly-ashcementgrouting materials,thevariationcharacteristicsandevolution mechanismofeachparameterinsealed statewere studied.Theresults indicatethat wavevelocityandresistivityarepositivelycorelatedwithage,while watercontentis inverselycorelated.Asthewatercementratioandwatercontent increase,thedegreeofhydrationreactiondecreases,andthe resistivityand wave velocityshowadecreasing trend.When the dosageofflyashincreases,at1and7days,flyash hasan inhibitoryeffectonhydrationreaction,reducing waterconsumptionand increasing watercontent.Wave velocityandresistivityare negativelyandpositivelycorelatedwithit,respectively.At14and28days,theactivereactionofflyashwasenhanced,promoting the hydration reaction.The change trend of the resistivity and wave velocity of the 0.5 water cement ratio grouting material withtheaditionofflyashwasopositetobefore.ButfortheO.7andO.9watercementratiosamples,thewave velocity andresistivityshoweda trendoffirstincreasingand thendecreasing,andthenincreasing,respectively.Theresearchresults provide some reference value for the research and development and engineering application of grouting materials.

Keywords: fly ash;nuclear magnetic T2 spectrum;wave velocity; resistivity

0 引言

粉煤灰作為我國排放量最大的工業(yè)固廢,截至2020 年底,總堆積量可達30億 。(剩余3731字)

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