Effect of Polyurethane on the Structure and solubility of Gypsum Soil
Keywords:
XRD, XRF, SEM, Gypsum soil, Polyurethane.Abstract
Gypsum soil is a problematic soil when its gypsum particles are contact with water. The objective of the research is studying the effect of adding polyurethane on the structure of the gypsum soil. This study is continuing to a previous study which explain the process of the treating gypsum soil that subject to water flow in a flume in an experimental canal. The samples of this study have been taken for testing them which stored for four years since 2018, along this period the samples were stored in a room temperature. In this study, these samples subjected to XRD, XRF, and SEM tests to explain the structure of the soil, before and after the treatment. The gypsum content test is done and the results are 41%. The results of XRD test proved that there was low effect of gypsum in the treated soil which have low gypsum index at 2-Thata value due to presence of polyurethane, while the results of XRF test explained that the concentration of elements in treated soil is greater than untreated soil and the reduction in concentrations of the elements Fe, Ca, K, S, and Zn are 83%, 32%, 54%, 85%, and 95%, respectively. In SEM test, the results showed that the gypsum soil became more cohesive due to the addition of the polymer material specially at the zoom 1.00 and 5.00 Kx.
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