الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Expansive soil creates problems for structures built on it due to its high swelling and shrinkage characteristics. The properties of the expansive soil are so important in many engineering fields. We seek to determine these properties by using cheap, easy, and quick methods instead of using traditional methods such as drilling and taking probes which are difficult to carry out. For long time, there is a great demand on using the geophysical methods and small, easy, and modern apparatus as to measure the soil characteristics in the field. The electrical resistivity method is considered one of these methods which measure directly soil properties from the ground surface level to any depth. In this investigation a resistivity field survey for a site in the Faculty of Engineering, EL Minia University campus using an electrical resistivity apparatus with eleven holes logs were performed. Research program has been conducted on specimens obtained by mixing commercial bentonite was added to clayey soil to produce sample with different swelling potential. It was difficult to use the electrical resistivity apparatus outside the university campus; hence samples with swelling potential were artificially produced by using bentonite. Many correlations between electrical resistivity were determines with each of the following properties of soil: optimum moisture content, maximum dry density, Atteberge limits, swelling pressure, and swelling potential. Linear correlations between different bentonite ratios with electrical resistivity were made. correlations between different bentonite ratios and the soil properties previously mentioned were conducted. Finally, linear correlations between different soil properties at different bentonite ratios.