浩婷 周颜 田宇 吴燕

作者简介:浩婷(1991),女,陕西汉中人,硕士,主要从事疏浚淤泥的资源化利用。E瞞ail:haoting333@126.com

通讯作者:吴燕（1976玻,女，湖南岳阳人，副教授，博士，主要从事胶体与表面化学研究。E瞞ail:wuya@tust.edu.cn.DOI：10.13476/j.cnki.nsbdqk.2014.04.031

摘要：利用经过自制改性剂处理的EPS（聚苯乙烯泡沫塑料）颗粒制作了复合固化剂，将其与渤海湾疏浚海泥按不同配混合，制备了疏浚淤泥混合轻量土。通过接触角测量及扫描电镜试验分析了改性剂对EPS表面性能的影响，并研究不同量改性剂改性EPS颗粒对对轻量土密度、压缩强度及压缩屈服应变的影响。结果表明：改性剂可有效增加EPS颗粒与淤泥土壤颗粒界面的亲和性，提高和易性与施工性能，提升轻量土结构稳定性；当改性剂掺入量为EPS颗粒质量的0.33 %时，所得改性EPS颗粒能够有效增加轻量土压缩强度，小幅度降低轻量土密度，但是对压缩屈服应变影响效果不明显。

关键词：疏浚淤泥；改性EPS颗粒；复合固化剂；轻量化处理

中图分类号：U412文献标志码：A文章编号：16721683（2014）04014304

Application of Modified EPS Particles in Lightweight Soil Mixed with Dredged Sludge

HAO Ting，ZHOU Yan，TIAN Yu，WU Yan

（School of Materials Science and Chemical Engineering,Tianjin University of

Science ＆ Technology，Tianjin 300457,china）

Abstract:The compound stabilizer was made using the EPS (expanded polystyrene) particles treated by self瞞ade modifier and then mixed with the dredged sludge from the Bohai Bay in different mixing ratios to obtain the lightweight soil mixed with dredged sludge.The effects of modifier on the surficial properties of EPS particles were analyzed using the contact angle measurement and scanning electron microscopy (SEM) test,and the impacts of EPS particles with different quantities of modifier on the density,compression strength,and compression yield strain of the lightweight soil were investigated.The results indicated that the introduction of modifier can enhance the combination ability of EPS with sludge particles and improve the workability and structural stability of lightweight soil.When the quantity of modifier was 0.33% of that of EPS particles,the compression strength of lightweight soil increased while the density of lightweight soil decreased,but the effect on compression yield strain was insignificant.

Key words:dredged sludge;modified EPS particles;compound stabilizer;lightweight process

我国是海岸线很长的国家，随着沿海经济的发展和经济全球化进程的加快，在沿海岸的许多地方淤积了大量海泥，造成了非常严重的海域污染和航道阻塞现象。为保证航道、港口的畅通，包括我国在内的世界各国都在开展大规模的疏浚和清淤工程，从而产生大量的疏浚淤泥，并且呈逐年增多的趋势［12］对于这些疏浚淤泥，若堆放则则占用大量土地；若抛到外海，会严重影响海洋资源的有效利用，对海洋环境造成不可弥补的破坏［3］。……