Evaluation of Dolime Fine Performance in Mitigating the Effects of an Expansive Soil

  • Ahmed Hisham
  • Shehab WissaEmail author
  • Ayman Hasan
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)


Expansive soils are classified as problematic soils that expand when in contact with water and shrink after drying out. The soils reactivity with water is due to the presence of clay minerals that react with water such as montmorillonite. Given the geotechnical problems associated with the expansion and shrinkage behavior of expansive soils, it is necessary to treat such soils before constructing on it. Mixing the soils with additives is considered one of the main treatment methods that has been used to reduce the expansion capabilities of these soils rendering them safe to construct on and remain stable. Dolime fine; that is obtained from crushing dolomite stone; has a great potential to be used as an additive to treat expansive soils, the reason for that comes from it being composed of a percent of calcium oxide (CaO) which is known for being a binding agent that can stabilize expansive soils. In the presented experimental study, dolime chips were brought from Erbil city (northern Iraq), while bentonite was brought from Samawa city (southern Iraq), as for natural soil it was brought from the marshes of Basra city (southern Iraq) for investigation. To assess the effectiveness of dolime fine in stabilizing expansive soils, a series of laboratory tests were conducted on an artificial expansive soil; that is composed of 75% bentonite and 25% natural clay; that was mixed with dolime fine passing through sieve No. 40. The series of experimental tests conducted on the dolime fine-expansive soil mixture include unconfined compressive strength tests (UCS); compaction tests; swelling tests; and California bearing ratio tests (CBR). Through the results of these tests, a conclusion can be reached to how much of an effect does the mixing of the dolime fine with an expansive soil have on the expansion ability of the soil under study.


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© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Soil Mechanics and Foundations Department, Public Works DepartmentCairo UniversityGizaEgypt

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