Experiment on Shear Behaviour of Silt Treated with Lignin at Critical State

PDF Full Text Download(925 KB)

China Journal of Highway and Transport ›› 2016, Vol. 29 ›› Issue (10) : 20-28.

ZHANG Tao^1,2, LIU Song-yu², CAI Guo-jun²

Author information +

History +

Abstract

To better apply industrial by-product lignin in silt subgrade, the indoor unconfined compressive strength test, triaxial compression test and scanning electron microscope test were carried out to investigate the shear strength behaviours and microstructural characteristics of lignin treated silt. The effects of lignin content and curing time on the strength and failure characteristics of lignin treated silt were analyzed. The strain-stress relationship of lignin treated silt was discussed under different confining pressures and different drainage shear conditions. The effect of cementation induced by lignin on the shear properties of treated silt was illustrated and the shear strength characteristic of lignin treated silt under critical state was also investigated. The results show that the unconfined compressive strength of lignin treated silt increases with the increase of lignin content, while the strength of sample exhibits a decreasing trend when the lignin content exceeds a certain range. The addition of lignin could also enhance the ductile characteristics of silt, and the optimum mass percentage of lignin for silt deposited in Jiangsu province is 12%. The ultimate deviator stress of lignin treated silt increases with the increases of confining pressure and lignin content and the increment displays a decline trend with the increase of confining pressure. Suction will be formed in the treated silt during the shearing process at low confining pressure and the ultimate excess pore pressure is lower in the treated silt than its natural counterpart at all levels of confining pressures. Under the condition of low confining pressure and drained shear, the volumetric strain of treated silt changes from shear contraction to dilatancy, however, it is completely shown as dilatancy at the high confining pressure condition. The cementing material induced by lignin fills the pores in the soil, the connections between soil particles are enhanced, therefore a more compact and stable soil microstructure is formed after treatment of lignin. The critical state line (CSL) of treated silt only shifts to the left with respect to natural silt. Cohesion can be used to indicate the effect of treatment by lignin on the strength of soil at critical state. It is believed that such investigation of shear behaviour for lignin treated soil at critical state would provide a foundation to the establishment of its constitutive model.

Key words

road engineering / shear strength / triaxial compression test / lignin / critical state

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

ZHANG Tao, LIU Song-yu, CAI Guo-jun. Experiment on Shear Behaviour of Silt Treated with Lignin at Critical State[J]. China Journal of Highway and Transport, 2016, 29(10): 20-28

References

[1] 张涛,刘松玉,蔡国军,等.木质素改良粉土热学与力学特性相关性试验研究[J].岩土工程学报,2015,37(10):1876-1793. ZHANG Tao,LIU Song-yu,CAI Guo-jun,et al.Experimental Study on Relationship Between Thermal and Mechanical Properties of Treated Silt by Lignin[J].Chinese Journal of Geotechnical Engineering,2015,37(10):1876-1793.
[2] CLARE K E,CRUCHLEY A E.Laboratory Experiments in the Stabilization of Clays with Hydrated Lime[J].Geotechnique,1957,7(2):97-111.
[3] BELL F G.Lime Stabilization of Clay Minerals and Soils[J].Engineering Geology,1996,42(4):223-237.
[4] LO S R,WARDANI S P R.Strength and Dilatancy of a Silt Stabilized by a Cement and Fly Ash Mixture[J].Canadian Geotechnical Journal,2002,39(1):77-89.
[5] AL-RAWAS A A.Microfabric and Mineralogical Studies on the Stabilization of an Expansive Soil Using Cement By-pass Dust and Some Types of Slags[J].Canadian Geotechnical Journal,2002,39(5):1150-1167.
[6] INDRARATNA B,MUTTUVEL T,KHABBAZ H,et al.Predicting the Erosion Rate of Chemically Treated Soil Using a Process Simulation Apparatus for Internal Crack Erosion[J].Journal of Geotechnical and Geoenvironmental Engineering,2008,134(6):837-844.
[7] CHEN R,DRNEVICH V P,DAITA R K.Short-term Electrical Conductivity and Strength Development of Lime Kiln Dust Modified Soils[J].Journal of Geotechnical and Geoenvironmental Engineering,2009,135(4):590-594.
[8] 张涛,刘松玉,蔡国军.固化粉土小应变剪切模量与强度增长相关性研究[J].岩土工程学报,2015,37(11):1955-1964. ZHANG Tao,LIU Song-yu,CAI Guo-jun.Relationship Between Small-strain Shear Modulus and Growth of Strength for Stabilized Silt[J].Chinese Journal of Geotechnical Engineering,2015,37(11):1955-1964.
[9] 刘松玉,张涛,蔡国军,等.生物能源副产品木质素加固土体研究进展[J].中国公路学报,2014,27(8):1-10. LIU Song-yu,ZHANG Tao,CAI Guo-jun,et al.Research Progress of Soil Stabilization with Lignin from Bio-energy By-products[J].China Journal of Highway and Transport,2014,27(8):1-10.
[10] CHEN B.Polymer-clay Nanocomposites:An Overview with Emphasis on Interaction Mechanisms[J].British Ceramic Transactions,2004,103(6):241-249.
[11] TINGLE J S,SANTONI R L.Stabilization of Clay Soils with Nontraditional Additives[J].Transportation Research Record,2003(1819):72-84.
[12] SANTONI R L,TINGLE J S,WEBSTER S L.Stabilization of Silty Sand with Nontraditional Additives[J].Transportation Research Record,2002(1787):61-70.
[13] PUPPALA A J,HANCHANLOET S.Evaluation of a New Chemical (SA-44/LS-40) Treatment Method on Strength and Resilient Properties of a Cohesive Soil[R].Washington DC:Transportation Research Board,1999.
[14] INDRARATNA B,ATHUKORALA R,VINOD J.Estimating the Rate of Erosion of a Silty Sand Treated with Lignosulfonate[J].Journal of Geotechnical and Geoenvironmental Engineering,2013,139(5):701-714.
[15] LIU J,XIAO J.Experimental Study on the Stability of Railroad Silt Subgrade with Increasing Train Speed[J].Journal of Geotechnical and Geoenvironmental Engineering,2009,136(6):833-841.
[16] 张涛,蔡国军,刘松玉,等.工业副产品木质素改良路基粉土的微观机制研究[J].岩土力学,2016,37(6):1665-1672. ZHANG Tao,CAI Guo-jun,LIU Song-yu,et al.Research on the Stabilization Microcosmic Mechanism of Lignin Based By-product Treated Subgrade Silt[J].Rock and Soil Mechanics,2016,37(6):1665-1672.
[17] CEYLAN H,GOPALAKRISHNAN K,KIM S.Soil Stabilization with Bioenergy Coproduct[J].Transportation Research Record,2010(2186):130-137.
[18] KIM S,GOPALAKRISHNAN K,CEYLAN H.Moisture Susceptibility of Subgrade Soils Stabilized by Lignin-based Renewable Energy Coproduct[J].Journal of Transportation Engineering,2011,138(11):1283-1290.
[19] 汤怡新,刘汉龙,朱伟.水泥固化土工程特性试验研究[J].岩土工程学报,2000,22(5):549-554. TANG Yi-xin,LIU Han-long,ZHU Wei.Study on Engineering Properties of Cement-stabilized Soil[J].Chinese Journal of Geotechnical Engineering,2000,22(5):549-554.
[20] 张敏,杨蕴明,李琦,等.含主应力旋转的应力路径对密砂临界状态的影响[J].岩石力学与工程学报,2013,32(12):2560-2565. ZHANG Min,YANG Yun-ming,LI Qi,et al.Influence of Stress Paths Including Principle Stress Rotation on Critical State of Dense Sand[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(12):2560-2565.
[21] CHEN Q,INDRARATNA B,CARTER J,et al.A Theoretical and Experimental Study on the Behaviour of Lignosulfonate-treated Sandy Silt[J].Computers and Geotechnics,2014,61:316-327.
[22] CHEN Q,INDRARATNA B.Deformation Behavior of Lignosulfonate-treated Sandy Silt Under Cyclic Loading[J].Journal of Geotechnical and Geoenvironmental Engineering,2014,141(1):151-155.
[23] DAFALIAS Y F.Bounding Surface Plasticity.Ⅰ:Mathematical Foundation and Hypoplasticity[J].Journal of Engineering Mechanics,1986,112(9):966-987.
[24] 张涛,刘松玉,蔡国军.考虑胶结作用的木质素固化粉土边界面塑性模型[J].岩土工程学报,2016,38(4):670-680. ZHANG Tao,LIU Song-yu,CAI Guo-jun.Boundary Surface Plasticity Model for Lignin-treated Silt Considering Cementation[J].Chinese Journal of Geotechnical Engineering,2016,38(4):670-680.

PDF Full Text Download(925 KB)

1574

Accesses

Citation

Detail

Sections

Recommended

Abstract
Key words
Cite this article
References

Received	Published
2015-12-09	2016-10-20
Issue Date
2016-11-04

Please choose a citation manager

Content to export

Abstract

Key words

Cite this article

{{custom_sec.title}}

{{custom_sec.title}}

References

{{custom_fnGroup.title_en}}

Footnotes

模态框（Modal）标题

Please choose a citation manager

Content to export

Abstract

Key words

Cite this article

{{custom_sec.title}}

{{custom_sec.title}}

References

{{custom_fnGroup.title_en}}

Footnotes