改性EPS颗粒在疏浚淤泥混合轻量土中的应用

发布时间：2018-03-27 19:19

本文选题：疏浚淤泥　切入点：改性EPS颗粒　出处：《南水北调与水利科技》2014年04期

【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。
[Abstract]:The composite curing agent was prepared by using EPS (polystyrene foam) particles treated with self-made modifier and mixed with dredged sea mud in Bohai Bay. The influence of modifier on the surface properties of EPS was analyzed by contact angle measurement and SEM test, and the density of EPS particles modified by different modifiers on light soil was studied. The results show that the modifier can effectively increase the interface affinity between EPS particles and silt soil particles, improve the compatibility and construction performance, and enhance the structural stability of lightweight soil. When the content of modifier is 0.33% of the mass of EPS particles, the modified EPS particles can effectively increase the compressive strength of the lightweight soil and reduce the density of the lightweight soil by a small margin, but the effect on the compressive yield strain is not obvious.
【作者单位】：天津科技大学材料科学与化学工程学院;
【分类号】：U616

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