Studying the Behavior of Asphalt Stabilized Gepseous Soil for Earth Embankment Model

Main Article Content

Hussein Q. Kasim Abdulameer

Abstract

The study presents the test results of stabilizing gypseous soil embankment obtained from
Al- Faluja university Campus at Al-Ramady province. The laboratory investigation was divided
into three phases, The physical and chemical properties, the optimum liquid asphalt (emulsion)
requirements (which are manufactured in Iraq) were determined by using one dimensional
unconfined compression strength test.in the first phase , The optimum fluid content was 11%
(6% of emulsion with 5% water content).. At phase two, the effect of Aeration technique was
investigated using both direct shear and permeability test. At phase three for the case of static
load , the pure soil embankment model under dry test condition was investigated, The testing
program included the determination of the unconfined compressive strength, direct shear
strength, constant head permeability test, and one dimensional consolidation test for pure and
asphalt stabilized gypseous soil. Testing was carried out in dry and absorbed conditions, the
maximum pressure that can be supported before failure (ultimate sustained pressure) is 0.76
MPa with vertical settlement (0.21 mm) . However, For the pure soil embankment model under
absorbed condition it was found that the maximum pressure before failure (ultimate sustained
pressure) is 0.3 MPa with vertical settlement (12 mm), Which reflects the reduction in bearing
capacity by (61%). Compression was made for absorbed stabilized soil and un-absorbed soil
tested under hydraulic conductivity test for seven days, the results showed that a very low
margin deffeneces in maximum pressure resistance and settlement were obtained (4.38 MPa ,
0.11mm ) and (4.11MPa , 0.12mm).

Article Details

Section

Articles

How to Cite

“Studying the Behavior of Asphalt Stabilized Gepseous Soil for Earth Embankment Model” (2014) Journal of Engineering, 20(05), pp. 25–43. doi:10.31026/j.eng.2014.05.02.

References

Al-Basri, M.F., 2012, Assessing Frictional Behavior of Earth Reinforcement Embedded in Asphalt Stabilized Gypseous Soil, M.Sc. Thesis, Civil Engineering Department, University of Baghdad.

- Al-Mohammadi, N.M., Nashat, I.H. and Bake, G.Y., 1987, Compresibility and Collapse of Gypsiferous Soils, 6th Asian Conference on Soil Mechanics, Tokyo.

- Al- Mufty, A.A. 1997, Effect of Gypsum Dissolution on the Mechanical Behaviour of Gypseous Soils, M.Sc. Thesis, Civil Eng Dep., Baghdad University.

- Al-Safarani, M.G., 2007, Improvement Ability of Gypseous Soil Characteristics Using Cutback Aasphalt and Lime, M. Sc. Thesis, Civil Engineering Department, University of Al – Mustansiria.

- Hamdy, B.H., 2010, Implementation of Gypseous Soil-Asphalt Stabilization Technique for Base Course Construction, M.Sc. Thesis, Dep.of Civil Engineering, University of Baghdad.

- Head, K.H., 1982, Manual of Soil Laboratory Testing, Vol. 2, Prentch, Press, London.

- Ingles, O.G., and Metcalf, J. B., 1972, Soil Stabilization Principles and Practice, Butter Worth Limited, Australia.

- Olutaiwo, A. O., Adedimila, A. S., and Sidiq, U., An Examination of the Use of Liquid Asphalt Binders in Road Works in Nigeria, Journal of Engineering and Applied Sciences, Vol. 3, No. 1, 2008 p 134-142.

- Sarsam, S. I., 1979, Soil-Cutback Mix for Base Course Construction in Some Parts of Iraq, M. Sc. Thesis, Civil Engineering Department, University of Sulaimaniah.

- Sarsam, S. I. and Ibrahim, S.W., 2008, Contribution of Liquid Asphalt in Shear Strength and Rebound Consolidation of Gypseous Soil, Engineering and Technology, Vol. 26, No. 4.

Similar Articles

You may also start an advanced similarity search for this article.