Pavement Performance Of Asphalt Mixture Research Articles

Experimental Study of Asphalt Mixtures Containing Polyolefin/Ethylene Copolymer Modifier by Dry Process

This paper presents a laboratory test to characterize the pavement performance of asphalt mixture containing polyolefin/ethylene copolymer modifier. The modifier is directly added into mixture like aggregates and is not necessary to modify the asphalt binder firstly, which is different with conventional modifier and is so-called dry process. Based on the aggregate grade of AC-13 mixture, the mechanical properties of polyolefin/ethylene copolymer modified hot mixtures asphalt (dry process) were studied by experimental tests, which include the high-temperature stability and water stability. The test results indicate that compared to the SBS asphalt mixture the dynamic stability and TSR improved 66% and 2.3% respectively, when the addition of RK300 is 0.3%.

Study of Road Property of Basalt Fiber Asphalt Concrete

In order to discuss the effectiveness of basalt fiber in reinforcing pavement performance of asphalt mixtures, the pavement performances of basalt fiber asphalt mixtures were investigated by tests of high temperature stability, water stability and low temperature crack resistance, and compared with the pavement performance of asphalt mixtures with polyester fiber and xylogen fiber, and that of reference mixture. The results show that pavement performance of fiber asphalt mixture are improved and optimized comparing with reference asphalt mixture, the performance of asphalt mixture with basalt fiber are excelled than those with polyester fiber and xylogen fiber while the dosage of fibers is keeping at the optimum.

Impact of Antistrip Additives on Pavement Performance Using Mechanistic-Empirical Pavement Design Guide

AbstractA comprehensive study was conducted to evaluate the impact of liquid and lime additives on the pavement performance of asphalt mixtures from five different sources around the United States. Three types of mixtures were evaluated from each source: untreated, liquid-treated, and lime-treated. The measured properties of the 15 mixtures included the dynamic modulus and their resistance to rutting and fatigue at the undamaged and moisture-damaged conditions. The measured performance properties of the mixtures were then used to conduct 20 years’ worth of structural designs for actual projects selected from the five sources of mixtures. For each project, a total of three structural designs were established using the Mechanistic-Empirical Pavement Design Guide by changing the type of mix used in the hot mix asphalt (HMA) layer. The percent cost savings or additional costs were estimated relative to the cost of the HMA pavement with the untreated HMA mixtures. Overall, the use of lime additives in HMA mixt...

Surface Modification Research for Asphalt Mixture Filler

Titanate coupling agent can modify the surface of inorganic filler and promote adhesion property of asphalt mortar. Moreover, it can also improve asphalt performance and pavement performance of asphalt mixture effectively, and reduce optimum asphalt content of mixture.

Comprehensive Evaluation on Technical Economic Performance and Scheme Optimization for Asphalt Mixture

The pavement performance of asphalt mixture and its adaptability to features of application area, cost estimation and harmonic relationship between performance and cost were studied and analyzed in this paper, evaluation model of technical and economic performance of asphalt mixture was constructed, evaluating indicators of technical and economic performance of asphalt mixture as performance matching coefficient, cost conversion demarcation coefficient and harmonic factor of performance and cost and corresponding calculation methods were proposed. On this basis, discrimination function of performance and cost was built to provide theoretical basis and decision support for selecting a satisfactory asphalt mixture scheme which had the best pavement performance and economic performance under certain natural and constraint conditions, it can provide a reference for the development of assist decision function of managerial system of pavement maintenance as well.

Experiment Study on the Performance of Manganese Slag Powder Asphalt Mixture

In order to inquiry the effect of manganese slag powder on the asphalt mixture pavement performance, With the asphalt mixture specimens produced by adding manganese slag powder of 1.5, 3.0, 4.5and 6.0 % into AC-16I asphalt mixture, the Marshall test, freeze thaw split test and rutting test were conducted. From the diagrams the corrosion resistance and high temperature stability performance and low temperature anti-cracking performance of these manganese slag powder asphalt mixture were determined. It was observed that high temperature stability performance and corrosion resistance began to significantly increase by adding rubber. By the analysis for the pavement performance mechanisms of manganese slag powder asphalt mixture, the change relation between manganese slag powder mixing amount and asphalt mixture pavement performance is presented.

Laboratory Study of Pavement Performance of Basalt Fiber-Modified Asphalt Mixture

In order to discuss the effect of the basalt fiber on reinforcing pavement performance of asphalt mixtures, the optimum dosage of asphalt and fibers were studied by the method of Marshall test and rut test firstly. Then pavement performances of basalt fiber-modified asphalt mixtures were investigated through tests of high temperature stability, water stability and low temperature crack resistance, and compared with that of polyester fiber, xylogen fiber and control mixture. The testing results showed that the pavement performance of fiber-modified asphalt mixture are improved and optimized comparing with control asphalt mixture, and the performance of basalt fiber-modified asphalt mixture with best composition were excelled than those of polyester fiber and xylogen fiber.

Morphology of Asphalt Mixture Rheological Master Curves

Most asphalt mixture rheology studies were limited to condition tests and condition-evaluation indices, which cannot describe the changes in mechanical properties along with changing external conditions. The full-temperature–full-frequency master curves of rheological functions for asphalt mixtures were obtained by dynamic shearing test and time-temperature-shift formulation. The Christensen-Anderson-Marasteanu rheological model and morphology theory were combined to obtain the morphological characteristics of the rheological master curves. These morphological parameters can better describe the pavement performances of asphalt mixtures.