عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Weathering is the important and controller factors of the physical and mechanical properties of peridotite rocks. The engineering properties of rocks undergo significant change due to the weathering process. Weathering depends on the mineralogical composition and peridotite texture properties. In this research, the effects of mineralogical characteristics of Harsin peridotite rocks in Kermanshah province were studied. The studies contains field investigations and laboratory tests. In field investigations, rock blocks collected and studied geological condition of the area. In laboratory studies, the thin sections of peridotites were first considered with different weathering conditions. Then, by performing physical and mechanical tests, specific gravity, unit weight, porosity, uniaxial compressive strength, Young's modulus, point-load index and hardness of samples were determined, respectively. In this study, due to the mineralogical characteristics and the degree of weathering of the peridotites, based on the degree serpentinization of rock in each stage of weathering, the effect of these factors on the engineering properties of the rock was evaluated. By using Excel software regression correlation the relationship between weathering, mineralogy and texture properties was determined by engineering geology characteristics of peridotites. These relationships have been linear functions. Also, F, t tests confirmed the 95% confidence level of proposed experimental relationships. Based on the results, the highest correlation 0.95, is founded between the point-load indexes with the index of micro-cracks. The results obtained in this study, show that the importance of texture properties is more important than mineralogical properties in determining the engineering geology properties of rocks. This means that the characteristics of grain such as shape and size, type of contact, degree of weathering, and the index of micro-crack show an important effect on the engineering geology characteristics of peridotite rocks.