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IMPROVING THE BEARING CAPACITY OF THE DIFFICULT FOUNDATION GROUND USING RECYCLED AGGREGATES FROM CRUSHED CONCRETE
Abstract
The research program consisted of 3 tests series that was carried out in a foundation cushion using recycled concrete aggregates as stuffing material and geosynthetic materials such as geogrids and geocells as reinforcement. It has been used a steel box with following dimensions 1x1x1.5 m. At the top of the foundation cushion it was sat a concrete foundation (with an area of 0.4 x 0.4 m) and there were applied vertically centered static loads. The dynamic loads were applied using a shaking table that has a maximum frequency of 6 Hz motion in the horizontal direction. After applying each level of loads, the deformations of the soil were read and recorded (settlement of foundation cushion). This study aims to highlight the positive effect of the improuved bearing capacity of the foundation cushion made of crushed concrete as stuffing material and geosynthetic materials as reinforcement grid as fallows: - decrease settlements by 29.6 % using geogrids and 10.6% using geocells; - increased bearing capacity by 35.6% using geogrids and 6.9% using geocells; - lowering the value of vibration velocity by 25.8% using geogrids and 20.9% using geocells.
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