Lime Stabilization Effects on Geotechnical Properties of Expansive Soils in Amman, Jordan
by
Geotechnical Engineer, Natural Resources Authority, Amman, Jordan
and
Associate Professor, Al-Balqa' Applied University, Al-Salt, Jordan
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Lime Stabilization Effects on Geotechnical Properties of Expansive Soils in Amman, Jordan by Geotechnical Engineer, Natural Resources Authority, Amman, Jordan and Associate Professor, Al-Balqa' Applied University, Al-Salt, Jordan Submit Discussion |
Abstract
The effect of lime stabilization on the Geotechnical properties of the expansive soils in Amman, Jordan, was investigated in this study. Amman, the capital of Jordan, is located at the central part of the country. About 40% of the area is covered with expansive clay soils. These soils were derived mainly from marl, limestone and chert bedrock (Cretaceous Age). The swelling and shrinkage potential of these soils that affected by mineralogical constituents and surrounding environment create serious problems to different types of construction. The Atterberg limits and other physical property tests were carried out in this study. The plasticity index and the linear shrinkage limit were (30-38.9%) and (18.6-20.7%) respectively. Based on Casagrande chart, the soils are classified as inorganic clay silt with high plasticity (CH). Mineralogical studies by using X-Ray diffraction showed that the soil consists of calcite, quarts, and clay minerals. The montmorollinite and kaolinite are the most common types of the clay mineral present in this soil. As well the grain size analysis for grains less than 63 microns by sedigraph showed that the samples consist mainly of clay size with 45-54% and silt size with 36-53.5%. The addition of lime stabilizer was found to decrease the plasticity indices and shrinkage limits. The best results were obtained by the addition of (3.5-5%) by dry weight of quick lime.
Keywords:KEYWORDS: lime stabilization, expansive soil, Jordan
