WFS-FA-EPS填料冻胀特性试验研究
摘要:对废铸砂(WFS)、粉煤灰(FA)、聚苯乙烯(EPS)发泡颗粒、水泥及水按一定质量比例混合制成的复合填料进行了冻胀试验,探讨了冻胀率与水泥含量、EPS颗粒含量以及含水率的关系。试验结果表明:单因素变化时,WFS-FA-EPS填料的冻胀率随水泥或EPS颗粒掺入比的增大近似呈线性降低,随含水率的增大近似呈线性增大;常温下导热系数随EPS颗粒掺入比的增大近似呈一阶指数降低;WFS-FA-EPS填料具有密度小、隔热性好、抗冻胀变形能力强的特点,适于作为寒区高冻胀路基的换填材料使用。
Abstract:A cement treated fills was fomed by blending waste foundry sand (WFS),fly ash (FA),expandable polystyrene (EPS) beads,Portland cement and water in proportions. The effects of mixing ratios on the frost heaving deforrmtion of the fills have been studied. The results show that increase of EPS beads content or cement content can reduce the frost heaving deformation of the WFS-FA-EtX3 fills The single factor is changed in the experiment,the frost heaving ratio decrease close to linearity with the increase of the cement content ratio or the EPS beads content ratio, the frost heaving ratio increase close to linearity with the increase d the water content. The thermal conductMty of the fills close to first-order exponential decay with the increase of the EPS beads content ratio under normal temperature; The formed WFS-FA-EPS fills with the characteristics of low density, low thermal conductivity and resistance to frost heaving deformation, which can be used as frost-resistant materials in the roadbed engineering of cold region.
中文标题：
WFS-FA-EPS填料冻胀特性试验研究
Experimental Study on Frost Heaving Behavior of WFS-FA-EPS Fills
作者：
于永堂1,邓安2,3,于清桦1
Yu Yongtang1,Deng An2,3,Yu Qinghua1
作者简介:于永堂,1983年生,男,满族,辽宁鞍山人,硕士研究生,工程师。主要研究方向:湿陷性黄土地基处理技术、土工测试技术。E-mail:yuyongtang@126.com
通讯地址：
1. 机械工业勘察设计研究院, 陕西西安 710043; 2. 河海大学岩土力学与堤坝工程教育部重点实验室, 江苏南京 210098; 3. 河海大学岩土工程科学研究所, 江苏南京 210098
1.ChinaJKInstituteofEngineeringInvestigationandDesign,Xi'an710043,Shanxi,China; 2.KeyLaboratoryofMinistryofEducationforGeomechanicsandEmbankmentEngineering,HohaiUniversity,Nanjing210098,Jiangsu,China; 3.GeotechnicalResearchInstitute,HohaiUniversity,Nanjing210098,Jiangsu,China
中图分类号:TU411
doi:10.3969/j.issn.1007-2993.2013.01.008
出版物：岩土工程技术
收稿日期:2012-05-29
关键词:废铸砂,粉煤灰,聚苯乙烯颗粒,轻质填料,隔热材料,冻胀变形
Key words:waste foundry sand,fly ash,EPS beads,lightweight fill,heat insulator,frost heaving deformation
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基金项目：
基金项目: 国家自然科学基金项目(50708031)
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