Dynamic Modulus of Porous Asphalt and the Effect of Moisture Conditioning

Nguyen, Tan Hung; Ahn, Jaehun; Lee, Jaejun; Kim, Jin Hwan

doi:10.3390/ma12081230

Cited by 15 publications

(9 citation statements)

References 10 publications

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“…The dynamic modulus is also lower for PAMs due to higher air void content; an increment of 1.5–3 times was observed upon reducing the air void content from 20.5% to 9.5%. However, after moisture conditioning, the dynamic modulus increases in the case of PAMs, which may be explained by the pore water in the voids [40].…”

Section: Porous Asphalt Mixtures Designmentioning

confidence: 99%

Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review

2019

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Despite the numerous benefits for preserving the hydrological cycle, permeable pavement systems (PPSs) found their major application in parking spots and for light traffic scenarios due to their limited durability and strength. To make the PPSs suitable for heavy traffic conditions without significant distresses, research is shifting toward the adoption of novel binders and additives for designing multifunctional porous asphalt mixtures which make up the surface course of PPSs. Certain additives are well known for enhancing the durability of dense graded asphalt mixtures and improving fatigue and rutting resistance. However, the studies on the influence of additives on abrasion resistance and binder draindown, which are the common problems in porous asphalt mixtures (PAMs), are still not well established. This paper summarizes best practices performed on PAMs and recommends possible future research directions for its improvement. Particular emphasis is placed on strength and resilience of PAMs by incorporating additives like nanosilica, crumb rubber, warm-mix additives, fibers (such as cellulose, glass, steel, and synthetic fibers), and some eco-friendly materials. It was found that different additives seem to have different effects on the properties of PAMs. Moreover, the combination of additives has synergistic benefits for the performance of PAMs, especially in urban pavements.

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Section: Porous Asphalt Mixtures Designmentioning

confidence: 99%

Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review

2019

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“…Some studies have shown that the freeze-thaw cycle is an important factor affecting the long-term performance of asphalt mixture [19][20][21]. Furthermore, it has been shown that air voids have a great influence on the freeze-thaw resistance of asphalt mixture [22][23][24]. However, in the technical specifications for permeable asphalt pavement (CJJ/T 190-2012) [25], only the general range of air voids of PAM is specified.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Performance Decay of Permeable Asphalt Mixture in Seasonally Frozen Regions under Freeze-Thaw Cycles

et al. 2020

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This paper focuses on the freeze-thaw cycles (F-T cycles) resistance of porous asphalt mixture (PAM) with different air voids in order to explore the gradation of the PAM suitable for seasonal freezing regions. Three sets of PAMs with 18%, 21%, and 25% air voids were designed. After 0–20 F-T cycles, the effects of F-T cycles on the performance degradation of three groups of PAMs were studied by performing a low-temperature splitting test with acoustic emission technology, a normal temperature splitting test, a compression test, a Cantabro particle loss test, and a dynamic creep test. The results show that the damage process of PAM caused by multiple F-T cycles could be more clearly defined by acoustic emission parameters. In addition, the larger the air void, the smaller its indirect tensile strength and compression strength, and the worse its particle loss resistance and high-temperature stability, which made the adverse effect of F-T cycles more significant. Therefore, the air void of PAM used in seasonal freezing regions is suggested to be less than 21%.

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“…In the case of traffic-induced vibrations, frequencies at 1 Hz are generated as a result of the change of surface deflection due to the weight of vehicles' non-oscillating movements. Slightly higher Tests for dynamic properties of specimens using this type of fatigue machine were carried out, among others, in work [15], in which the effect of moisture conditioning on dynamic modulus of porous asphalt was studied. MTS Landmark Servohydraulic Test Systems type 370.10 equipped with a temperature chamber was used for applying loads to samples.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement

Czech

Gardziejczyk

2020

Materials

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Stiffness is an important mechanical characteristic of asphalt mixtures used in the wearing course. It is one of the determining factors in the generation of tyre/road noise. The dynamic stiffness of the upper layer of the road surface depends on the physical and mechanical properties of the materials it is composed of, and traffic load. Determination of dynamic stiffness, both in laboratory conditions and in situ, requires consideration of many other factors. Tests of dynamic properties of road surfaces in field conditions are most often conducted with the help of modal hammers. Impulse excitation results are usually less accurate than those in the application of modal exciters. The test stand was constructed, comprising a tripod, 32-channel and 24-bit data acquisition system, exciter, signal amplifier, impedance head, single-axis piezoelectric accelerometers and a stinger. The test stand and the proposed method of measuring dynamic stiffness do not require the determination of the resonance frequency of the tested specimen and can be used both on various types of bituminous mixtures of varying shape and dimensions, as well as directly on the upper surface of the wearing course of bituminous pavements. The test results showed that the type of bituminous mixture used in the wearing course significantly affects its dynamic stiffness. The dynamic stiffness level of asphalt concrete, stone mastic asphalt and porous asphalt layers was determined to be similar. The addition of rubber granulates significantly reduced its rigidity, which is very beneficial from the point of view of reducing the tyre/road noise.

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Dynamic Modulus of Porous Asphalt and the Effect of Moisture Conditioning

Cited by 15 publications

References 10 publications

Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review

Incorporation of Additives and Fibers in Porous Asphalt Mixtures: A Review

Experimental Study on the Performance Decay of Permeable Asphalt Mixture in Seasonally Frozen Regions under Freeze-Thaw Cycles

Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement

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