内嵌型植物秸秆草砖的基本力学性能研究  

Study on the basic mechanical properties of embedded plant straw brick

作　　者：李晓东[1] 卢悦 张振永 任鹏武 LI Xiaodong;LU Yue;ZHANG Zhenyong;REN Pengwu(School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《新型建筑材料》2023年第12期65-68,共4页New Building Materials

基　　金：国家自然科学基金项目(51968043)。

摘　　要：以植物秸秆、苎麻纤维、土、粉煤灰、糯米胶为原材料制备糯米胶-植物秸秆-土-粉煤灰砖(简称GPSF砖),通过正交试验研究NaOH浓度、秸秆浸泡时间、糯米胶掺量、养护时间、土和粉煤灰掺量对GPSF砖力学性能的影响。结果表明:粉煤灰掺量对GPSF砖抗压强度的影响较大;NaOH浓度、土掺量及粉煤灰掺量对GPSF砖抗折强度的影响较大。GPSF砖的最优配合比为:NaOH浓度7%,秸秆浸泡时间36 h,养护时间21 d,糯米胶、土、粉煤灰掺量分别为植物秸秆质量的100%、125%、50%,制备的GPSF砖抗压、抗折强度分别为10.03、6.67 MPa。Glutinous rice glue-plant straw-soil-fly ash brick(GPSF brick)was prepared by using plant straw,ramie fiber,soil,fly ash,glutinous rice glue as raw materials,and the influence of NaOH concentration,soaking straw time,glutinous rice glue dosage ratio,curing days,soil and fly ash mixing ratio on the mechanical properties of GPSF brick was studied by orthogonal experiments.The results show that the ratio of fly ash has a significant impact on the compressive strength of GPSF bricks.The concentration of NaOH,soil content,and fly ash content have a significant impact on the flexural strength of GPSF bricks.The optimal mix ratio for GPSF bricks is:NaOH concentration of 7%,straw soaking time of 36 hours,curing time of 21 days,glutinous rice glue,soil,and fly ash content of 100%,125%,and 50%of plant straw mass,respectively.The compressive and flexural strength of the prepared GPSF bricks are 10.03 and 6.67 MPa,respectively.

关 键 词：内嵌 植物秸秆 草砖 正交试验 力学性能 

分 类 号：TU522.1[建筑科学—建筑技术科学]