Analysis of Mechanical Properties and Microstructure of Solidified Hydraulic Fill Silt and Sand
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摘要: 中国沿海地区吹填造地过程中产生大量低成本的淤泥和吹填砂.同时,此类地区建设公路中却需要大量高成本水泥稳定碎石等建筑材料.针对此类问题,本文采用不同类型的固化剂固化淤泥和吹填砂混合物替代传统公路修筑材料,研究了固化后泥砂混合物的无侧限抗压强度及其微观结构.结果表明:相对于水泥固化剂,本项目研发的固化剂可大幅度提高固化泥砂混合物的强度;其机理是新型固化剂可形成更多的胶凝和膨胀性产物,其中有机化合物可通过聚合反应形成有机分子链,包裹泥砂混合物颗粒,密实土体结构.Abstract: A large amount of cheap hydraulic fill silt and sand in coastal land reclamation project will be generated,meanwhile,the road construction project in this region needed a large number of expensive building materials such as cement stabilized crushed stone.In view of these problems,different stabilized mixtures of hydraulic fill silt and sand were used to replace the traditional construction materials;and the unconfined compressive strength and microstructure of stabilized soil were studied.Resultsshow that compared to the cement stabilizer,stabilizer developed in this project can significantly increase the strength of stabilized silt and sand mixture.The solidification mechanism is that the new stabilizers can produce more gel and expansive hydrated products,and the organic compounds in stabilizers can form organic molecules by polymerization process,which can wrap the particles of silt and sand resulting in the soil structure being compacted.
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Keywords:
- hydraulic fill silt and sand /
- stabilizer /
- microstructure /
- solidification mechanism
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[1] KANIRAJ S R,HAVANAGI V G.Compressive strength ofcement stabilized fly ash-soil mixtures[J].Cement andConcrete Research,1999,29(5):673-677.
[2] KAMON M,GU H,MASAHIRO I.Improvement ofmechanical properties of ferrum lime stabilized soil with theaddition of aluminum sludge[J].Materials ScienceResearch International,2001,7(1):47-53.
[3] SIVAPULLAIAH P V,PRASHANTH J P,SRIDHARANA,et al.Reactive silica and strength of fly ashes[J].Geotechnical and Geological Engineering,1998,16(3):239-250.
[4] MITCHELL J K,HOOPER D R,CAMPANELLA R G.Permeability of compacted clay[J].Journal of SoilMechanics&Foundations Div,1965,91(4):41-65.
[5] 万百千,路新瀛.用固硫渣作土壤固化剂的可行性研究[J].粉煤灰综合利用,2002(3):21-22.WAN Bai-qian,LU Xin-ying.The feasibility study ofsulfur residue-soul stabilizer[J].Fly Ash ComperhensiveUtilization,2002(3):21-22.(in Chinese) [6] 秦鹏飞,周克,高华东.曹妃甸滩涂淤泥化学加固处理的试验研究[J].地基处理,2008,19(4):32-37.QIN Peng-fei,ZHOU Ke,GAO Hua-dong.Chemicalstablization research tests on coastal mud of caofeidian[J].Ground Improvement,2008,19(4):32-37.(inChinese) [7] 李战国.工业废渣制备软土固化剂若干问题探讨[D].北京:北京航空航天大学交通科学与工程,2009.LI Zhan-guo.Study on some problems of utilization ofindustrial wastes to prepare soft soil stabilizer[D].Beijing:School of Transportation Science and Engineering,Beihang University,2009.(in Chinese) [8] 徐艳.滨海淤泥的快速固化研究[D].武汉:中国科学院武汉岩土力学研究所,2007.XU Yan.Study on the curing of silt in coastal regions[D].Wuhan:Institute of Rock&Soil Mechanics,the ChineseAcademy of Science,2007.(in Chinese) [9] 张务民.路基用吹填泥砂稳定性能研究[J].中外公路,2011,31(3):1-5.ZHANG Wu-min.Character analysis of hydrates needed instabilized saline sludge[J].Highway of China and ForeignCountry,2011,31(3):1-5.(in Chinese) [10] HUANG Xin,LI Zhan-guo,NING Jian-guo,et al.Principle and method of optimization design for softstaiblizer[J].Journal of Wuhan University ofTechnology:Materials Science Edition,2009,24(1):154-160.
[11] 黄新,许晟,宁建国.含铝固化剂固化软土的试验研究[J].岩石力学与工程学报,2007,26(1):156-161.HUANG-Xin,XU Sheng,NING Jian-guo.Experimentalresearch on stabilized soft soils by alumina bearingmodifier[J].Chinese Journal of Rock Mechanics andEngineering,2007,26(1):156-161.(in Chinese) [12] 柴寿喜.固化滨海盐渍土的强度特性研究[D].兰州:兰州大学土木工程与力学学院,2006.CHAI Shou-xi.Study on the special properties of strengthof solidified saline soil in inshore[D].Lanzhou:Collegeof Civil Engineering and Mechanics Sciences,LanzhouUniversity,2006.(in Chinese) [13] 张硕峰.城市污泥调理工艺及其机理研究[D].广州:广东工业大学环境科学与工程学院,2012.ZHANG Shuo-feng.Research on conditioning echnologyand mechanism of municipal excess sludge[D].Guangzhou:Faculty of Environmental Science andEngineering Guangdong University of Technology,2012.(in Chinese)
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