粉煤灰－水泥浆液物性响应及演化特征研究

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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

粉煤灰作为我国排放量最大的工业固废，截至2020 年底，总堆积量可达30亿 。（剩余3731字）