IMPLEMENTATION OF GYPSEOUS SOIL-ASPHALT STABILIZATION TECHNIQUE FOR BASE COURSE CONSTRUCTION
محتوى المقالة الرئيسي
الملخص
The aim of this research work is to study the effect of stabilizing gypseous soil, which covers
vast areas in the middle, west and south parts of Iraq, using liquid asphalt on its strength properties
to be used as a base course layer replacing the traditional materials of coarse aggregate and broken
stones which are scarce at economical prices and hauling distances.
Gypseous soil brought from Al-Ramadi City, west of Iraq, with gypsum content of 66.65%,
medium curing cutback asphalt (MC-30), and hydrated lime are used in this study.
The conducted tests on untreated and treated gypseous soil with different percentages of medium
curing cutback asphalt (MC-30), water, and lime were: unconfined compression strength, and one
dimensional confined compression under both dry and absorbed test conditions.
The test results showed that stabilizing gypseous soil using the optimum fluid content of 16% (5%
cutback asphalt+11% water) have improved the unconfined compressive strength, compressibility,
rebound consolidation, and waterproofing of gypseous soil, but under absorbed condition the
stabilized gypseous soil using cutback asphalt only did not satisfy the requirements for base course
construction, therefore it was decided to use lime additive to improve the properties of soil-cutback
mixture under absorbed condition.
تفاصيل المقالة
القسم
كيفية الاقتباس
المراجع
Al-Kawaaz, N., 1990. "Characteristics of Soil Asphalt Mixture" M. Sc. Thesis, College of Engineering, University of Baghdad.
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.
Al-Sharrad, S. I., 2007. "Effect of Cut-back MC-60 on Permeability and Compressibility of Gypseous Soil" IJCE-7th Issue, (p 16-26).
Building Research Advisory Board Study for Federal Housing Administration, 1969. "Chemical Soil Stabilization" National
Academy of Sciences, Washington D. C.
Head, K.H., 1980. "Manual of Soil Laboratory Testing" Volume 1, Prentch, Press, London.
Head, K.H., 1982. "Manual of Soil Laboratory Testing" Volume 2, Prentch, Press, London.
Kadiyali, T. M. and Lal, N. B., 2006. "Principles and Practices of Highway Engineering" Third Edition. Khanna Publishers, New Delhi.
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.
Stafen, M., 1994. "Soil stabilization for pavements" technical manual, No. 5-822-14, Air force manual, No 32- 1 0 19.
Taha, M.Y., Al-Obaydi, A.H.and Taha, O.M., 2008. "The Use of Liquid Asphalt to Improve Gypseous Soils" Al-Rafidain Engineering, Vol. 16, No. 4, (p 38-48).
Transport and Road Research Laboratory (TRRL), 1974. "Soil Mechanics for Road Engineers" London: Her Majesty’s Stationery Office. (HMSO).