建材世界2024年第45卷第1期doi:10.3963/j.issn.1674-6066.2024.01.005煤渣泡沫轻质土制备及性能研究何志兵1,曾慧姣2,3,王伟光4,秦明强2,3(1.中交二航局第二工程有限公司,重庆401121;2.中交武汉港湾工程设计研究院有限公司,武汉430040;3.海工结构新材料及维护加固技术湖北省重点实验室,武汉430040;4.中交第二航务工程局有限公司,武汉430040)摘要:为提高煤渣利用率,采用电厂煤渣为集料制备泡沫轻质土,研究不同煤渣种类、细度及掺量对泡沫轻质土工作性能、力学性能和软化系数的影响规律。结果表明:泡沫土的密度与煤渣密度呈正相关,与1h吸水率呈负相关;抗压强度与煤渣的密度和筒压强度呈正相关;软化系数随煤渣筒压强度和1h吸水率的增大先降低后升高。以多孔疏松块状结构煤渣(SS)为骨料,控制其细度模数介于2.3~3.5之间,掺量不超过65%时,制备而成的泡沫轻质土力学强度及耐水性能良好,可以满足水下减载回填的设计要求。关键词:煤渣;泡沫轻质土;密度;软化系数ResearchonPreparationandPropertiesofLightCinderFoamSoil,,,HEZhi-bing1ZENGHui-jiao2,3WANGWei-guang4QINMing-qiang2,3(1.SecondEngineeringCo,Ltd,SecondAviationBureauofChinaCommunications,Chongqing401121,China;2.WuhanHarborEngineeringDesign&ResearchInstituteCo,LtdofCCCG,Wuhan430040,China;3.HubeiKeyLaboratoryofAdvancedMaterials&ReinforcementTechnologyResearchforMarineEnvironmentStructures,Wuhan430040,China;4.CCCCSecondShippingEngineeringBureauCo,Ltd,Wuhan430040,China)Abstract:Inordertoimprovetheutilisationrateofcinder,thefoamlightweightsoilwaspreparedbyusingpowerplantcinderasaggregate,andtheinfluencelawofdifferentcindertypes,finenessanddosageonthemechanicalproper-tiesoffoamlightweightsoilwasstudied.Theresultsshowthat:thedensityoffoamsoilispositivelycorrelatedwiththedensityofcinder,andnegativelycorrelatedwith1hwaterabsorption;thecompressivestrengthispositivelycorrelatedwiththedensityandcylindercompressivestrengthofcinder;thesofteningcoefficientdecreasesandthenriseswiththeincreaseofcindercylindercompressivestrengthand1hwaterabsorption.Whenporousloosebulkstructurecinder(SS)isusedasaggregate,controllingthemodulusofitsfinenessbetween2.3~3.5,andthemixingamountnotmorethan65%,themechanicalstrengthandwaterresistanceoffoamedlightsoilaregood,whichcanmeetthedesignre-quirementsofunderwaterlighteningandbackfilling.Keywords:coalcinder;foamedlightsoil;density;softeningcoefficient泡沫轻质土是一种轻质多孔的水泥基材料,具有密度可调整、浇筑自流平、保温隔热、吸能减震等特点,凭借其特殊的结构特性被广泛应用于各种减载回填工程。使用泡沫轻质土代替砂、碎石等用于减载回填,不。仅能够弥补常规回填存在的成本问题,减小结构所