Author/Authors :
ÇİMEN, Ömür Süleyman Demirel Üniversitesi - Mühendislik Fakültesi - İnşaat Mühendisliği, Turkey , DERELİ, Burak Süleyman Demirel Üniversitesi - Mühendislik Fakültesi - İnşaat Mühendisliği, Turkey
Abstract :
Engineers aim structures to fix strong ground by using their information and common sense, so long as it appropriates circumstances. However, because of increasing world population, industrialization, declining the agricultural lands and so on, concluding reveals to be used a poor grounds to a necessity declining strong ground regions, low resistance and properties of deformation. Therefore, engineers, in accordance with the terms of the geotechnical in terms of the basis of construction, prefer to improve floor with the most appropriate conditions. Because expansive and dispersive soils damage engineering structures, extensive studies on using additives to ameliorate the effects of these soils have been conducted for many years. In this study, the effects of colemanite, which is one of the boron oxide group, upon strength value have been experimentally investigated. This study serves two different purposes. One of them is to improve soil strength properties and the other one is to open a new usage area for boron which is abundant in our country. In experimental studies, colemanite mineral at a weight of %2, %4, %6, %8, and %10 was added to bentonite clay. First, optimum water content value for all the mixtures was determined. Later the samples to be used for unconfined compression test and swelling test were subjected to experiments after they were prepared with optimum water content. According to the test results, maximum unconfined compressive strength and maximum dry density and minimum optimum water content have been obtained in the samples prepared with %2 colemanite and with the increasing amount of colemanite, a decrease in swelling pressure has been observed.
