复合掺配生土改性试验及抗压性能分析  

Experimental study on compressive properties of modified raw soil mixed with inorganic industrial waste

作　　者：杨阳 胡爱萍 李平 李伟刚 王健 YANG Yang;HU Aiping;LI Ping;LI Weigang;WANG Jian(School of Civil Engineering,Long dong University,Qingyang 745000,Gansu China;Gansu Province Gully Fixing andTableland Protection Engineering Research Center,Qingyang 745000,Gansu China)

机构地区：[1]陇东学院土木工程学院,甘肃庆阳745000 [2]甘肃省固沟保塬工程研究中心,甘肃庆阳745000

出　　处：《粘接》2023年第4期83-87,共5页Adhesion

基　　金：甘肃省青年科技基金计划(项目编号:22JR5RM212);甘肃省自然科学基金项目(项目编号:21JR11RM052);甘肃省高等学校创新基金项目(项目编号:2022A-136);甘肃省建设科技项目(项目编号:JK2021-56);庆阳市自然科学基金项目(项目编号:QY2021A-F023)。

摘　　要：为了推动工业固体废弃物综合利用,改善传统生土材料的力学性能,通过在生土材料中添加煤矸石粉、矿粉、石灰、粉煤灰和麦秸秆灰等5种材料复合掺料进行生土改性试验,依据《土工试验方法标准》(GBT 50123—2019)制备了96个Φ102 mm×116 mm的圆柱体试样,在室内养护28 d后不烘和烘干2种状态下进行轴心抗压试验,得到改性生土试件的荷载-位移关系,分析了复合材料对改性生土抗压强度的影响规律和复合掺料的最优配比。结果表明:煤矸石粉、矿粉、石灰、粉煤灰和秸秆灰掺量分别为0%、8%、6%、8%和2%时,复合材料改性生土试样的28 d抗压强度最大,2种状态下分别达到了3.07、5.07 MPa,与同养护条件的素土试样相比,其分别是其抗压强度的1.71、1.77倍。In order to promote the comprehensive utilization of industrial waste and improve the mechanical properties of traditional raw soil materials,the raw soil modification test was conducted by adding five kinds of admixtures such as coal gangue powder,mineral powder,lime,fly ash,and wheat straw ash to the raw soil material,and 96 cylindrical specimens ofΦ102 mm×116 mm were prepared according to the Standard for soil method(GBT50123—2019).The axial compression test was carried out in two conditions of non-drying and drying after a 28 d period of indoor maintenance.The load-displacement relationship of the modified raw soil specimens was obtained,and the influence law of the composite on the compressive strength of the modified raw soil and the optimal ratio of composite admixtures were analyzed.The test results showed that the 28 d compressive strength of the composite modified raw soil specimens was the highest when the admixtures of coal gangue powder,mineral powder,lime,fly ash and wheat straw ash were 0%,8%,6%,8%and 2%,reaching 3.07 MPa and 5.07 MPa,respectively,which were 1.71 times and 1.77 times of the compressive strength compared with the plain soil specimens with the same maintenance conditions.

关 键 词：工业废弃物 复合材料 改性生土 抗压 试验 

分 类 号：TQ111.19[化学工程—无机化工]