Closure: Laws of Proportioning Concrete

Fuller, William B.; Thompson, Sanford E.

doi:10.1061/taceat.0001978

Cited by 26 publications

(1 citation statement)

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“…For aggregates with discontinuous gradation, there is a lack of particles of one or several grades, causing a relatively large "break" between large and small particles in the gradation curve, which is thus discontinuous and intermittent. With regard to continuous gradation, various design methods for aggregate gradation have been proposed, including the n, i, and k methods based on the maximum density curves proposed by Fuller [13]. With regard to discontinuous gradation, the stone matrix asphalt and open-graded friction course have been proposed [14][15][16][17][18] for the design of aggregate gradation.…”

Section: Introductionmentioning

confidence: 99%

A New Method for the Aggregate Proportion Calculation and Gradation Optimization of Asphalt-Treated Base (ATB-25)

Han

Zhang

et al. 2021

Mathematical Problems in Engineering

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Asphalt-treated base (ATB-25) is a widely used flexible base material. The composition and gradation of mineral aggregate are important factors affecting pavement performance of asphalt treated base. In this study, two new methods were proposed to address the problems of existing aggregate proportion calculation for asphalt mixtures: (1) the combination of generalized inverse solution of the normal equation and spreadsheet trial and (2) quadratic programming. Both methods can calculate mass ratios of various aggregates in a quick and accurate manner. The orthogonal test was used to design nine aggregate gradations within the range of asphalt treated base (ATB-25) stated in the industrial standard. The aggregate proportion was calculated by two new methods. The Marshall test, water weight test, rutting test, and water-soaked Marshall test were carried out on the asphalt mixture specimens. The pavement performance test results were fuzzified using the fuzzy mathematics method, and the weights of pavement performance evaluation indexes were determined through the analytic hierarchy process. Taking the fuzzy comprehensive evaluation values as the objective function, test results were analyzed and evaluated. Finally, the optimal aggregate gradation was determined considering factors of compactness, high-temperature rutting resistance, and water stability.

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