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Present computer techniques for determining aggregate blends to meet a specified gradation for bituminous pavement mix design are not entirely satisfactory. Often aggregate blends must still be optimized by trial-and-error hand calculations to approximate the desired gradation. In addition to gradation limits and tolerances, there are limitations for the amounts of particular aggregates to be used in a mix design or for the total amount of fines that can be present in the mix. This study was undertaken to develop the logic for a computer optimization techniques that would blend the given aggregates to conform as closely as possible to the desired gradation and to fall within the specified limits. As a result, two computer programs have been written using two different optimization techniques and are presently being used for bituminous pavement mix design at the U.S. Army Engineer Waterways Experiment Station (WES). Both programs satisfy the requirements of this investigation. (Author).
The complexity of specifications and the number of materials options available today for concrete production mean that the traditional procedure of making trial mixes is now unnecessary, expensive and time consuming. Using J.D Dewar's research, this book shows how a small amount of materials data can be used confidently to predict the composition o
Computer Methods and Recent Advances in Geomechanics covers computer methods, material modeling and testing, applications to a wide range of geomechanical issues, and recent advances in various areas that may not necessarily involve computer methods, and will be of interest to researchers and engineers involved in geotechnical mechanics and geo-engineering.
The 24th European Symposium on Computer Aided Process Engineering creates an international forum where scientific and industrial contributions of computer-aided techniques are presented with applications in process modeling and simulation, process synthesis and design, operation, and process optimization. The organizers have broadened the boundaries of Process Systems Engineering by inviting contributions at different scales of modeling and demonstrating vertical and horizontal integration. Contributions range from applications at the molecular level to the strategic level of the supply chain and sustainable development. They cover major classical themes, at the same time exploring a new range of applications that address the production of renewable forms of energy, environmental footprints and sustainable use of resources and water.
Provides a clear, comprehensive introduction to the subject. Different problems of optimization are considered and illustrated with examples. Large sets of new experimental data are presented and discussed.