عنوان مقاله [English]
LCPC test is one of the most common methods for assessing the abrasivity of rock particles and soil grains. Regarding the lack of a standard testing procedure to determine the abrasivity of soils, the test has become very popular in recent decades. In this paper, LCPC tests were used to study the effect of clay on soil abrasivity. Mixing crushed silica grains and clay particles, different abrasive samples were produced in the testing program. Different moisture contents and stress levels were applied during the tests. The amount of consumed energy for each test was calculated as well with measuring and recording the consumed power of electromotor during the tests. The results showed that the level of water content has a considerable effect on the obtained LCPC abrasivity coefficient values. The recorded wears are minimum when the moisture content is in the range between the plastic limit and the liquid limit of the clay. However, abrasivity coefficients show an increasing trend with the moisture content when the moisture is greater than the liquid limit of existing clay. Based on the results, abrasivity is nearly zero in pure clay samples. Increasing the applied stress levels on the soil samples increases the soil abrasivity. However, increasing the clay content of the tested samples decreases the effect of stress levels on the observed trends. In the pure clay samples, no correlation was obtained between the applied stress levels and LCPC abrasive coefficient.