Link Between Test Records on Concrete and its Ingredients Obtained from different Laboratories

Control tests of ingredients and then of concrete are conducted on different levels during production, acceptance and in service. The tests are carried out by producers, users or their representatives, and independent bodies. In the traditional quality control of concrete structures, the link between the test records from different laboratories involved in the specific construction process is waek or negligible. Efforts are curently being made in quality assurance systems to correlate and analyze the test results from different levels for their use in production control. This paper presents the results of an investigation of the construction of a hydroeletric power plant, by means of serial correlation, segmentation technique and moving average. An algorithm relating concrete, cement and aggregate data bases has been developed. Instead of a global approach, the effect of time dependent parameters on quality are obtained.