Abstract
Unconfined compression test is one of the common experiments to determine the compressive strength of asphalt concrete mixtures. In this test, the asphalt concrete sample is loaded under vertical pressure (oj) and the lateral pressure on the sample (cj) during the loading procedure is zero. It is obvious that this results in a reduction in the compressive strength of the asphalt concrete. In the present investigation, by making asphalt concrete samples with different specifications, the compressive strength values were determined through unconfined compression test and the results were analysed by comparing them with those obtained from Hveem stabilometer test on the same samples. The effect of the elemination of lateral pressure (Os) was clarified and finally, a mathematical model was presented to determine the relation between the compressive strengths obtained from these two tests.
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