A Criterion for Selection of Natural Aggregates in Concrete

By fast growing of structures and need for aggregates materials, more quarry resources should be provided and rapid identification and exploration of these resources should be introduced. Because of the importance of engineering geology parameters in exploration of aggregate quarries sources, based to in-situ and laboratory studies in this research, the parameters and criteria were determined and the results are presented as a simple applicable criterion. For this purpose, first site investigation was carried out and then samples and specimens from different selected mines were taken. Laboratory tests were carried out in accordance with relevant standards, and finally concrete samples were prepared using these materials. The results of tests on aggregates and concrete have been analyzed, and parameters involved in the quality of the concrete were classified and presented as a criterion. According to accuracy and ease application of this criterion, it is applicable for selecting the materials with minimum experiments, the desirable mines identification and an estimate of the ultimate strength of concrete will be provided for the engineers. The criteria according to type and kinds of the samples, is applicable with a broad scope in different geographical areas.