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Low rise buildings are particularly vulnerable to ground movements sourced from swelling and shrinking of the expansive clays. Geotechnical engineers have long recognized that Swelling of expansive clays caused by moisture variation may result in considerable damage to the overlying structures, and engineers should take them into the consideration. The literature contains a vast number of stabilizing techniques such as lime, cement, fly-ash for treatment of expansive clays. However the use of gypsum as a stabilizi...

A summary of abundance, quality and usage areas of the known bentonite occurrences in Turkey has been explained for this study. Bentonite that is one of the most important and abundant clays of Turkey has lower cost in comparison to other raw materials. Turkey has significant resources of bentonite that have been reported approximately 370 million tons base reserve. Also Turkey is one of the leading producers with 950 000 tons per year. Lower cost of bentonite in comparison to other raw materials for various usage...

As a foundation material, gypsum differs from other rocks in that voids may be found at almost any depth within the rock mass. Collapse structures in gypsum terrains are the most serious geological hazards because they can damage engineering structures, settlement areas, natural lakes, and allow infiltration of contaminant into the groundwater. Collapse and subsidence may occur in the course of time or suddenly and catastrophically. Presentation of engineering geological data in the form of a hazard map is a usefu...