Abstract
Quality control in ready-mixed concrete industry is increasingly emerging as a tool for achieving highest quality at lowest cost. In typical construction projects, compressive strength is the most important criterion for assessing the acceptability of a concrete batch from a given plant. Variability in compressive strength of concrete batches is inevitable in practice. This has lead researchers in the field of quality control to analyze the statistics of strength results in order to draw conclusions about quality level in concrete plants and ways to improve it. In the present research the quality of concrete materials is examined using well established quality control tools and techniques. The main objective of the study is to identify and evaluate opportunities for improvement in concrete production processes and in pouring methods of concrete. The results showed that management should set systematic procedures using quality tools such as histograms, control charts and fishbone diagrams, to analyze concrete strength data and detect any abnormal variation. (C) 2017 The Authors. Published by IASE.