Investigation of the effect of mineralogy and physicomechanical properties of source rock on compressive strength of concrete

Mineralogy and physical and mechanical properties of rocks used in the production of aggregates are the most important parameters for deciding on the method of their use for various engineering purposes. Concrete is one of the products produced in the construction industry that has the highest consumption of stone in the form of sand gravel materials in its building. In this paper, the effect of mineralogy as well as physicomechanical properties of aggregate on the compressive strength of concrete with C25 strength class has been investigated. They are exposed in the east of Ardabil (Iran). In order to conduct research, 20 samples of mines and sand workshops active in the harvest area and physical and mechanical tests and lithography and mineralogy were performed. Then, the ratio of concrete components by ACI method was determined so that the ratio of water to cement was kept constant in all designs and no additives were used. To analyze the results, the rock masses of the region were divided into four categories based on the type and mineralogical composition and the effect of their physicomechanical properties on the strength of concrete in each category was investigated separately. The results show that the strength of concrete made with andesitic rock mass (class II) has the highest value and class IV (dolomitic rock mass) has the lowest value. Also, concrete made of limestone (class III) depending on different characteristics Mineralogy and physicomechanics offer a wide range of resistances.