Numerical and Experimental Investigation of Optimal Soil Improvement with Lime and Cement and Its Impact on Reduction of Settlement in West Tehran Wastewater Treatment Plant

Document Type : Research Article

Authors

1 Iran University of Science and Technology: Tehran, Tehran

2 Master of Science Parand Branch, Islamic Azad University, Parand, Iran.

3 Master of Science, Tarbiat Modares University

4 Islamic Azad University,Parand Branch

Abstract

In this research, lime and cement additives were used to stabilize clay and therefore to reduce the settlement in raft foundations. Lime and cement were mixed with clay and the effect of the use of these two additives on the stabilization of fine clay soil in the laboratory was investigated. Soil samples in normal state and combination with different percentages of lime and cement equal to 3%, 6%, and 8% dry weight of soil for laboratory tests including Atterberg limits test, grading test, standard compaction test, uniaxial compressive strength test, and California bearing ratio test. Also, the consolidated undrained triaxial compression strength test (CU) and direct shear tests were used. The results showed a decrease in the plasticity and maximum dry density of soil and an increase in optimum moisture content, compressive strength, and also the California bearing ratio of clay by adding these two materials. The cohesion and internal friction angle obtained from consolidated undrained triaxial compression strength tests (CU) and direct shear tests increase with increment of cement and lime percentages. After laboratory tests, the effects of the use of soil improvement with depths of 1m, 2m, 4m, 6m, 8m, and 10m using Plaxis2D software suggests that as the depth of improvement increases, the number of settlement decreases, which is a lot different from that of the plate loading test before improvement while the difference between the results obtained from Plaxis2D and plate loading test after improvement is negligible.

Keywords

Main Subjects

References

[1] Ali Eskandari, Maryam Hodhodi, “Investigation of the stabilizing effect of clay with lime “First National Conference on Soil Mechanics and Foundation Engineering, 2014, in Persian
[2] Nima golchinfar, “Effect of freezing and thawing cycles on compressive strength of lime-stabilized clay soils reinforced with polypropylene fibers “Master of Geotechnical Thesis, 2012, in Persian
[3] Amir Mohammad Tabatabae, Road pavement, Thirteenth Edition, University Publication Center, 2007-2008, in Persian
[4] Al-Rawas. A. A, Goseen. M, Expansive Soils –Recent Advances in characterization and treatment –2006
[5] N. Yong, Reymond and R. Ouhadi, Vahid,“Experimental study on instability of bases on natural and lime/cement-    stabilized clayey soils”, Applied Clay Science 2007
[6] Asma Muhmed, DariuszWanatowski "Effect of Lime Stabilisation on the Strength and Microstructure of Clay" IOSR Journal of Mechanical and Civil Engineering Volume 6, Issue 3, May. - Jun. 2013
[7] Jaber Shahiri, Mojtaba Ghasemi " Utilization of Soil Stabilization with Cement and Copper Slag as Subgrade Materials in Road Embankment Construction"  International Journal of Transportation Engineering Volume 5, No.1, Summer 2017
[8] Anil Pandey, Prof. Ahsan Rabbani, "Soil Stabilisation Using Cement" International Journal of Civil Engineering and Technology, Volume 8, Issue 6, June 2017
[9] Sai Harshita M M, " Soil Stabilisation using Lime " International Journal for Research in Applied Science & Engineering Technology Volume 6, Issue I, January 2018
[10] Rinu Jose, N P Rajamane "Influence of lime and cement in strength characteristics of soil" International Journal of Scientific & Engineering Research Volume 9, Issue 1, January-2018
[11] Ika Puji Hastuty, Roesyanto “Comparison of the Use of Cement, Gypsum, and Limestone on the Improvement of Clay by Using Unconfined Compression Test “Journal of Civil Engineering FORUM, Vol.
[12] Yulian Firmana Arifin, and Gazali Rahman “Stabilization of Soft Soil with Cement and Palm Kernel Shell Ash Admixture “MATEC W eb of Conferences 280, 0 (2019)
[13] Nosrati, “Comparison of the effect of lime and cement type 2 on the compressive strength of clay soils with high plasticity index in different conditions” Second international conference on geotechnical and urban seismic engineering, 2015, in Persian
[14] Instructions embankment stabilization and pavement of roads, Journal 268, Publications Management and Planning Organization, in Persian
[15] Dr. Sunil S. Pusadkar, Ms. Tejas Bhatkar "Behaviour of Raft Foundation with Vertical Skirt Using Plaxis 2d" International Journal of Engineering Research and Development Volume 7, Issue 6 (June 2013)
[16] Ministry of Power, Journal 231, Plate loading test on soil and soft rock, in Persian
[17] Wael N. Abd Elsamee  “An Experimental Study on the Effect of Foundation Depth, Size and Shape on Subgrade Reaction of Cohessionless Soil” Published Online October 2013
[18] Amini, Laboratory review Comparison of the stabilizing effect of lime, cement and product made with nano technology (CBR+)  in clay soil with high plasticity index, 2014, in Persian
Amirkabir Journal of Civil Engineering
Volume 53, Issue 7
October 2021
Pages 2937-2956

Files

Share

How to cite

Statistics