STABILIZATION OF FINE SAND USING METAKAOLIN

Document Type : Original Article

Authors

1 1Department of Civil Engineering, Faculty of Engineering, Delta University for Science & Technology, Gamasa, Egypt

2 Department of Civil Engineering, Faculty of Engineering, Mansoura University, Mansoura, Egypt

Abstract

Soil improvement techniques by adding different materials, such as bitumen, bentonite, lime, etc. are considered to be effective methods to improve soil properties. Metakaolin is considered to be a promising supplementary construction material which can be used to improve soil properties, especially fine sand. Fine sand in sand dunes that spread by the wind may lead to several damages to agricultural crops, buildings and roads. The purpose of this study is to investigate the effect of mixing fine sand with Metakaolin. Different mass percentages of Metakaolin (0%, 1%, 2%, 5%, 10%, 15%, and 20%) by dry weight of soil were mixed with fine sand to assess their erodibility with time. A simplified low cost Pocket Erodometer Test (PET) was implemented in this research. The experimental results indicated that soil erodibility decreased significantly at optimum percentage of 10% Metakaolin by weight compared to untreated soil. It was also noted that mixing 10% of Metakaolin increases shear strength of soil and decreases hydraulic conductivity compared to untreated soil.

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