An investigation for the effects of local natural pozzolans on some mechanical properties of concrete

ABSTRACT: For a long time,concrete has been used as an important building material.Many research projects are currently carried out on the concrete.Results of these researches show that durability, workability, resistance against fire, corrosion, and airing highly changed and improved in concretes.In concrete production, pozzolan can be used instead of ordinary Portland cement at a specific rate. In this study, a series of laboratory tests were conducted on various concrete classes (C20, C25, C30, C35) for varying rates of pozolan (10%, 20%, 30% and 40%) which obtained by TRNC’s Karpas region instead of cement. In these experiments, for the various contribution rates of pozzolan in various concrete classes,compressivestrength, tensile strength and shrinkage rates for concrete were determined. According to the results of the experiment, by increasing the percentages of pozolan ratesinstead of cement in concrete,the compressive, tensile strength and shrinkage decreased. These indicators reveal that used pozzolans are not too active. Keywords: Natural Pozzolan, Compressive Strength, Tensile Strength, Shrinkage …………………………………………………………………………………………………………………………………………………………………………………………………………