Characterization of aggregate interlocking in hot mix asphalt by mechanistic performance tests

Polaczyk, Pawel; Ma, Yuetan; Xiao, Rui; Hu, Wei; Jiang, Xi; Huang, Baoshan

doi:10.1080/14680629.2021.1908408

Cited by 51 publications

(32 citation statements)

References 12 publications

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“…The high-temperature stability of asphalt mixture refers to the characteristic of resisting the repeated action of vehicle load without significant deformation under the condition of high temperature. Due to the lack of high-temperature stability, there are some asphalt pavement distresses including rutting, side shift, disintegration, bleeding, and so on, of which rutting is the most common distress [ 35 ]. The most widely used and mature methods for high-temperature stability of asphalt mixture are rutting test and uniaxial static creep test, which have been described in previous studies [ 13 , 36 ].…”

Section: Methodsmentioning

confidence: 99%

Performance Deterioration of Asphalt Mixture under Chloride Salt Erosion

et al. 2021

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In order to ensure smooth traffic and driving safety, deicing salt or snow melting agents are usually adopted to solve the problem of traffic jams and prevent pavement surfaces from freezing. The objective of this present study is to investigate the performance deterioration evaluation of asphalt mixture under the chloride salt erosion environment. Five chloride salt solution concentrations were designed and the uniaxial static compression creep test, low-temperature IDT test, freeze-thaw splitting test, and freeze-thaw cycle test were carried out for asphalt mixtures (AC-16) soaked in chloride salt solution. Results showed that with the increase in chloride salt solution concentration, the high-temperature stability, low-temperature crack resistance, and water stability of the asphalt mixture decreases. Moreover, the high-temperature stability, low-temperature crack resistance, and water stability of the asphalt mixture show a decreasing trend under different chloride salt solution concentrations following the negative cubic polynomial function. Based on the viscoelastic analysis, chloride salt solution could reduce the ability of the asphalt mixture to resist instantaneous elastic deformation and permanent deformation, and this influence will become more obvious with the increase in chloride salt solution concentration. In addition, the salt freeze-thaw cycle test indicated that in the early stage of freeze-thaw cycles, the splitting tensile strength of the asphalt mixture decreases rapidly, then tends to be flat, and then decreases rapidly. This study explores the performance damage law of asphalt mixture under salt corrosion, and the analysis results of this study could provide some references for the chloride salt dosage in the snow melting project while spreading deicing salt.

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Section: Methodsmentioning

confidence: 99%

Performance Deterioration of Asphalt Mixture under Chloride Salt Erosion

et al. 2021

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“…AC-13 BFAC was utilized with a grade 70 penetration bitumen content of 4.3% and mineral filler content of 6%; the fiber content was 0.5% by the weight of mixture. Referring to the relevant literature [ 28 , 29 ], the following preparation process was formulated: First, aggregate and asphalt were mixed for about 90 s at 160 °C to make them uniformly mixed, then basalt fiber was gradually added and also mixed for about 90 s; finally, mineral filler was added. At the same time, except for the fact that basalt fiber was not added, the material and preparation process of AC-13 OAC were the same with BFAC.…”

Section: Test Setup and Methodsmentioning

confidence: 99%

Experimental Study on Basalt Fiber Crack Resistance of Asphalt Concrete Based on Acoustic Emission

Yang

et al. 2021

Materials

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In this study, the semicircle three-point bending tests of ordinary asphalt concrete and basalt fiber asphalt concrete were carried out and acoustic emission parameters were collected during the test. The differences of the characteristics of acoustic emission parameters between basalt fiber asphalt concrete and ordinary asphalt concrete were analyzed, and the damage stages were divided based on the variation of acoustic emission parameters; Rise Angle and Average Frequency were introduced to study the cracking mode and crack resistance mechanism of asphalt concrete with basalt fiber. The results show that the acoustic emission parameters can well represent the toughening and crack resistance effect of basalt fiber in asphalt concrete, and the damage stages can be divided into three stages: microcrack initiation stage, fracture stage, and residual stage. The duration of the fracture stage and the load resistance time of the specimen were greatly prolonged. The proportion of shear events in the whole failure process increased greatly after the basalt fibers were added, especially in the fracture stage, which reduced the tensile failure tendency of the specimens, and thus improved the bending and tensile performance of the specimens and played a toughening and crack resistance role in the fracture stage.

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“…Therefore, many research centers are looking for effective methods of counteracting the initiation of this type of damage [ 14 , 15 , 16 , 17 ]. The resistance of asphalt mixtures designed by the Superpave method with the use of a gyratory compactor and AC depends on the effectiveness of aggregate wedging [ 18 , 19 ]. The authors prove that the anti-rutting additive (ARA) and SBS-modified bitumen improve the rutting resistance of AC and SMA mixtures.…”

Section: Introductionmentioning

confidence: 99%

Influence of Type of Modified Binder on Stiffness and Rutting Resistance of Low-Noise Asphalt Mixtures

Pakholak¹,

Plewa²,

Gardziejczyk³

2021

Materials

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Low-noise asphalt mixtures are characterized by increased air void content. Their more open structure contributes to faster degradation within the operating temperature range. For this reason, binder modification is used in their production. The correct selection of modifiers allows one to significantly improve the technical properties of the mixtures. The article presents the results of tests of six types of mixtures: stone mastic asphalt (SMA8), porous asphalt (PA8), stone mastic asphalt reducing tire/road noise (SMA8 LA) and stone mastic asphalt reducing tire/road noise, with 10%, 20% and 30% content of rubber granulate (RG). Bitumen 50/70 modified with copolymer styrene butadiene styrene (SBS) and crumb rubber (CR) was used for the production of the mixtures. In order to determine the differences in the technical properties of the mixtures, the following parameters were tested: stiffness modules by indirect tensile testing of cylindrical specimens (IT-CY) in a wide range of positive temperatures, and resistance to permanent deformation using the British and Belgian methods with the use of double wheel tracker (DWT). The test results and their analysis confirmed that there was a significant improvement in the IT-CY stiffness modules of SBS and CR modified mixtures. Replacing more than 20% of coarse aggregate with RG causes a significant decrease in the stiffness of the mixture (by 90% in relation to the reference mixture SMA8 LA). The SMA mixtures obtained lower values of rutting resistance parameters (WTS and PRD) in water (Belgian method) compared to the results obtained in the air tests (British method). On the other hand, mixtures of PA, thanks to the compression of stresses in pores filled with water, obtained better results when the rutting resistance test was performed in the water (Belgian method).

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Characterization of aggregate interlocking in hot mix asphalt by mechanistic performance tests

Cited by 51 publications

References 12 publications

Performance Deterioration of Asphalt Mixture under Chloride Salt Erosion

Performance Deterioration of Asphalt Mixture under Chloride Salt Erosion

Experimental Study on Basalt Fiber Crack Resistance of Asphalt Concrete Based on Acoustic Emission

Influence of Type of Modified Binder on Stiffness and Rutting Resistance of Low-Noise Asphalt Mixtures

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