|Table of Contents|

Experimental study on strength properties of mixed lightweight soil from recycled sludge

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2013年03期
Page:
83-
Research Field:
Publishing date:

Info

Title:
Experimental study on strength properties of mixed lightweight soil from recycled sludge
Author(s):
Sha Ling12Wang Guocai3Jin Feili3Chen Longzhu1
1.Institute of Engineering Safety and Disaster Prevention,Shanghai Jiaotong University,Shanghai 200240,China; 2.Department of Architectural Engineering,Zhejiang College of Construction,Hangzhou 311231,China; 3.Institute of Geotechnical Engineering,Zheji
Keywords:
sludge mixed lightweight soil strength property unconsolidated undrained triaxial test direct shear test
PACS:
TU411
DOI:
-
Abstract:
In order to reveal the strength properties of mixed lightweight soil,the strength properties and mechanism of mixed lightweight soil from recycled sludge are investigated experimentally,which is prepared and solidified with the engineering waste sludge as raw soil and expanded polystyrene(EPS)beads as light materials.The effects of the cement content,volume fraction,confining pressure and curing age,etc of EPS beads on their strength properties are analyzed by unconsolidated undrained triaxial test and direct shear test.The results show that the p-q curves of mixed lightweight soil are linear for different EPS beads volume fraction and cement contents,q=mp+α.The larger the EPS beads volume fraction is,the smaller the value of α is,but the value of m changes a little.The larger the cement content is,the larger the value of α is,but the value of m changes a little.At a certain stress range,the shear strength envelope curve of mixed lightweight soil is a straight line,and the shear strength is connected with the cement content,EPS beads volume fraction,confining pressure and curing age,etc.The shear strength of the samples increases with the increase of confining pressure.The cohesive force increases with the increase of cement content and decreases with the increase of EPS beads volume fraction.The longer the curing age is,the higher the strength and cohesive force of the mixed lightweight soil are.The strength development mechanism of mixed lightweight soil is similar with that of ordinary soil,and its strength can be divided into cohesive component,dilatation component and friction component.

References:

[1] 李明东,朱伟,马殿光,等.EPS颗粒混合轻质土的施工技术及其应用实例[J].岩土工程学报,2006,28(4):533-536.
Li Mingdong,Zhu Wei,Ma Dianguang,et al.Construction technology and application in-situ for expanded polystyrene treated lightweight soil[J].Chinese Journal of Geotechnical Engineering,2006,28(4):533-536.
[2]顾欢达,顾熙.混合塑料发泡颗粒轻质土的强度特性评价方法[J].中国公路学报,2007,20(1):41-46.
Gu Huanda,Gu Xi.Evaluation approach on strength properties of mixed plastic foamed beads light soil[J].China Journal of Highway and Transport,2007,20(1):41-46.
[3]Kim Y T,Kim H J,Lee G H.Mechanical behavior of lightweight soil reinforced with waste fishing net[J].Geotextiles and Geomembranes,2008,26(6):512-518.
[4]卞夏,邓乘,邓永锋,等.高含水率疏浚淤泥混合固化轻质土试验研究[J].防灾减灾工程学报,2009,29(5):524-529.
Bian Xia,Deng Cheng,Deng Yongfeng,et al.Laboratory tests on cemented bead-treated lightweight soils from high-water-content dredged sludge[J].Journal of Disaster Prevention and Mitigation Engineering,2009,29(5):524-529.
[5]李晶,缪林昌,钟建驰,等.EPS颗粒混合轻质土反复荷载下变形和阻尼特性[J].岩土力学,2010,31(6):1769-1775.
Li Jing,Miao Linchang,Zhong Jianchi,et al.Deformation and damping characteristics of EPS beads-mixed lightweight soil under repeated loading-unloading[J].Rock and Soil Mechanics,2010,31(6):1769-1775.
[6]陈永辉,石刚传,曹德洪,等.气泡混合轻质土置换路基控制工后沉降研究[J].岩土工程学报,2011,33(12):1854-1862.
Chen Yonghui,Shi Gangchuan,Cao Dehong,et al.Control of post-construction settlement by replacing subgrade with foamed cement banking[J].Chinese Journal of Geotechnical Engineering,2011,33(12):1854-1862.
[7]Horpibulsuk S,Suddeepong A,Chinkulkijniwat A,et al.Strength and compressibility of lightweight cemented clays[J].Applied Clay Science,2012,69(1):11-21.
[8]金菲力.淤泥再生混合轻质土工程特性的试验研究[D].杭州:浙江工业大学建筑工程学院,2012.

Memo

Memo:
-
Last Update: 2013-03-25