垃圾电厂废灰改性水泥土的应变分析  

Strain Analysis of Waste Ash Modified Soil-cement in Waste Power Plant

作　　者：俞钦钦 王立峰 陈建建 冯利坡 Yu Qinqin;Wang Lifeng;Chen Jianjian;Feng Lipo(Architectural Engineering Institute,Zhejiang University of Science and Technology,Hangzhou 310023,China;Jinhua Rail Transit Investment and Construction Co.,Ltd.,Jinhua Zhejiang 321000,China)

机构地区：[1]浙江科技学院土木与建筑工程学院,杭州310023 [2]金华市轨道交通投资建设有限公司,浙江金华321000

出　　处：《科技通报》2019年第12期155-160,174,共7页Bulletin of Science and Technology

基　　金：浙江省大学生科技创新活动计划暨新苗人才计划项目;基金编号2018R415032。

摘　　要：以垃圾废灰作为改性材料,将其与水泥、淤泥质黏土和水混合成新的复合水泥土材料,通过室内无侧限抗压强度试验,在不同废灰掺量、不同龄期、不同水泥掺量的条件下,研究垃圾废灰水泥土的极限应变以及垃圾废灰水泥土平均弹性模量的变化规律。试验结果表明:垃圾废灰水泥土的应力应变关系经历弹性变形、局部变形、应力衰减、残余强度等四个阶段。养护龄期早期7~14 d这段时间是平均弹性模量增加的主要快速阶段。水泥掺量的增加在不同养护龄期下对同一废灰掺量水泥土的平均弹性模量既有促进作用也有抑制作用。当养护龄期为28 d,水泥掺量为20%,废灰掺量为5%时,垃圾废灰水泥土的平均弹性模量最大。本文的研究成果为工程应用提供了试验数据和理论依据,具有一定参考价值。With garbage waste ash as the modified material,its mixed with cement,muddy clay and water into a new composite soil material,through the indoor unconfined compressive strength test,the waste ash content,different age,different conditions of different dosage of cement,the waste ash the ultimate strain of cement-treated soil and waste scrap grey water average elastic modulus of soil.The test results show that:The stress-strain relationship of garbage waste cement soil experienced four stages:elastic deformation,local deformation,stress attenuation and residual strength.The early curing period of 7 d-14 d is the main rapid stage for the increase of the average elastic modulus.The increase of cement content can promote and inhibit the average modulus of elasticity of cement soil with the same amount of waste ash at different curing ages.When the curing age is 28 days,the cement content is 20%,and the waste ash content is5%,the average elastic modulus of cement-soil with waste ash is the largest.The research results of this paper provide experimental data and theoretical basis for engineering application and have certain reference value.

关 键 词：无侧限抗压强度 垃圾废灰 龄期 平均弹性模量 

分 类 号：TU443[建筑科学—岩土工程]