Investigation of the usability of gumushane region magmatic rocks as concrete aggregates

In this study, Gumushane region of Turkey, known for its wealth of rock and greatly mounts of the granite, andesite, diorite and as reference limestone types magmatic rocks are investigated use of as concrete aggregates. The physical, chemical, petrographic and lithological mapping studies were performed on aggregate types. The physical and mechanical tests were performed on total 12 types of concretes to produced four different types aggregate and three different strength class. The most important compressive strength; destructive uniaxial, non-destructive surface hardness, ultrasonic method and compound method were determined on 3rd, 7th and 28th days. Generally all the target strengths of concrete has been reached. However, at the end of 28 days, the diorite, granite and andesite concretes respectively showed higher strength than limestone concretes. According to the limestone aggregates, diorite concrete between 4-14%, granite concretes between 6.6 to 21% and andesite concretes between 33.3 to 48%showed higher strength. Moreover, capillary water absorption, unit density, visible space and slump tests were performed. The most capillary water absorption of limestone concrete, the least of andesite and granite concretes were determined. The most water absorption of diorite concrete the rate of 8.41%, the least of limestone concrete the rate of % 2.80% were determined. The most unit density of diorite concrete, the least of limestone concrete were determined. Consequently, the andesite, granite and diorite rock types of region Gumushane were evaluated suitable for the production of concrete. Keywords: Aggregate, Andesite, Pressure, Diorite, Granite, Capillarity, Limestone