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)