冻融循环下纤维-造纸废物联合改良淤泥质土力学性能研究  

Study on the mechanical properties of fiber-papermaking waste combined improvement of silty soil under freeze-thaw cycle

作　　者：尹晓雯 YIN Xiaowen(Zhonglu Youce(Beijing)Engineering Consulting Co.,Ltd.,Beijing 100070,China)

机构地区：[1]中路优策(北京)工程咨询有限公司,北京100070

出　　处：《粘接》2024年第2期139-142,共4页Adhesion

摘　　要：为了利用更加环保且经济的方式改善淤泥质土的工程性能,研究采用造纸工业的副产品木质素磺酸盐和废弃轮胎纺织纤维对淤泥质土进行改良,分析了改良前后试样的强度和抗冻融循环能力。结果表明,木质素磺酸盐和纤维均能一定程度上提升土体的强度和抗冻融循环能力,但1.5%木质素磺酸盐和0.6%纤维复合改良效果最佳。微观结构及傅里叶红外光谱结果表明木质素磺酸盐能生成新的离子键使松散基质的淤泥质土颗粒粘结性增强,纤维能连接土颗粒之间的孔隙,增强其抗拉伸能力。In order to improve the engineering properties of silty soil in a more environmentally friendly and economical way,the by-product lignosulfonate of the paper industry and the textile fiber of waste tires were used to improve the silty soil,and the strength and freeze-thaw cycle resistance of the samples before and after improvement were analyzed.The results showed that both lignosulfonate and fiber improved the strength and freeze-thaw cycle resistance of soil to a certain extent,but 1.5%Lignosulfonate and 0.6%fiber had the best improvement effect.The results of microstructure and Fourier infrared spectroscopy showed that lignosulfonate could generate new ionic bonds to enhance the cohesibility of silt soil particles in the loose matrix,and the fibers could connect the pores between soil particles to enhance the tensile resistance.

关 键 词：淤泥质土 造纸废弃物 木质素磺酸盐 废弃纤维 工程特性 冻融循环 

分 类 号：TU447[建筑科学—岩土工程]