Download or read book Computer Simulation for Quality Assurance in Asphaltic Concrete Production written by Norman F. Bolyea and published by . This book was released on 1969 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The New York State Department of Transportation's Engineering Research and Development Bureau has developed a computer simulation of asphaltic concrete production, for evaluation and improvement of quality assurance. As far as can be determined, this is the first simulation directed towards formulating a quality assurance program for blending of bulk materials. The model consists of a set of random data generators simulating hot bin and final mix gradations. Drift from the plant mean caused by production fluctuations can be introduced into the process, with the drift's starting pint, duration, and magnitude determined randomly. Operating characteristics are determined for any quality assurance method by simulating numerous and different plants--which are representative of normal production--and by adjusting quality assurance parameters for various testing strategies. With the increasing complexity of testing schemes, evaluation by simulation is the only feasible method of analysis. This technique is used to develop operating characteristic data for a quality assurance program as applied to standard top course mix. The basic model is in generalized form, with all mix characteristics entered by the user. It is applicable to any mix for which proper distributions can be formulated. The program is written in FORTRAN IV, and with only minor file card adjustments, may be run on either the Burroughs B5000 or the IBM 360 computers. This discussion briefly covers the background of the computer simulation and evaluation of one proposed quality assurance program. A full report on building the simulation model, along with program listings, is also available for the engineer who is familiar with statistical methods.