Investigation of Acoustic Properties of Poroelastic Asphalt Mixtures in Laboratory and Field Conditions

The on-going growth in the use of motor vehicles leads to a number of traffic safety problems. Therefore, various traffic calming measures are applied to increase traffic safety in built-up areas. Lane narrowing is one of the techniques used to influence the perception of drivers and make them slow down. With this in mind, the authors conducted traffic volume and speed counts before and after installation of the lane narrowing treatment, covering 100 passing vehicles, at an intersection between an urban dual carriageway and an estate street where over a dozen fatal accidents occurred in the recent years. Traffic noise was also measured, both before and after lane narrowing. The traffic count data were analysed to show speed reduction by ca. 15 km/h, yet in all cases still above 50 km/h, which is the speed limit applicable to built-up areas in Poland. The analysis of the “before” and “after” noise maps showed only minor changes to the distribution of noise. The locations of these changes to the acoustic environment depended on the speed and volume of traffic and, much more importantly, on the topography of the surrounding area, the existing roadside layered landscape and the type of planted vegetation. The detailed analyses of the analysed parameters demonstrated that sustainable design of traffic calming measures on urban dual carriageways must consider not only the desired speed reduction but also the surrounding landscape and the local topography.

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“…Additionally relevant is the type of the road surface, composition of traffic, type of tires, etc. [22][23][24][25][26] and many other factors.…”

Section: Introductionmentioning

confidence: 99%

Effect of Lane Narrowing Implemented on an Urban Dual Carriageway on Speed Reduction and Acoustic Environment

Sołowczuk

Kacprzak

2021

Buildings

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“…During all five stages of selection of the poroelastic mix composition, about one hundred twenty variants were tested, differing in mineral mix, content and fractions of rubber, content and type of asphalt binder, and type of additives (reinforcing fibres, WMA additives, and hydrated lime additive). In total, with the addition of samples taken from the test sections that differed in the method of compaction and type of interlayer bonding technique, over 200 variants were tested [ 11 , 12 , 20 , 21 , 22 , 23 , 24 , 25 ].…”

Section: Methodsmentioning

confidence: 99%

“…Construction of the section in Dąbrówka and Galaktyczna Street in Gdańsk is presented in detail in [ 24 ]. Detailed information about second short test section is given in [ 25 ]. In the case of the third long test section (K), the selection of poroelastic mixtures to be used was based on additional tests from the second short test sections constructed in 2020 (MTM2).…”

Section: Methodsmentioning

confidence: 99%

“…Construction of short test sections was carried out along with the progress of laboratory work on determining the composition of the poroelastic mixture in terms of wearing course durability, adhesion with the underlying layer, acoustic properties, and skid resistance. Test results of sound absorption coefficient, drainability, macrotexture, and friction coefficient, along with their analysis on short test sections built in 2018–2020, were discussed in detail in the works [ 25 , 28 ].…”

Section: Characteristics Of Pavements On Test Sectionsmentioning

confidence: 99%

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Bitumen-Based Poroelastic Pavements: Successful Improvements and Remaining Issues

et al. 2023

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This article presents the development process of designing and testing poroelastic pavement based on highly polymer-modified bitumen. Poroelastic wearing course was composed of mineral and rubber aggregate mixed with highly polymer-modified bitumen, in contrast to previous trials, during which polyurethane resins were mainly used as binder, which led to several serious technological problems concerning difficult production, insufficient bonding to the base layer, and unsatisfactory durability. The laboratory testing phase was aimed at finding the proper composition of the poroelastic mixture that would ensure required internal shear strength and proper bonding of the poroelastic layer with the base layer. After selecting several promising poroelastic mixture compositions, field test sections were constructed and tested in terms of noise reduction, rolling resistance and interlayer bonding. Despite the very good acoustic properties of the constructed poroelastic wearing course, it was not possible to solve the problem of its insufficient durability. Still, the second major issue of poroelastic pavements that concerns premature debonding of the poroelastic layer from the base layer was completely solved. Experience gained during the implementation of the described research will be the basis for further attempts to develop a successive poroelastic mixture in the future.

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“…Such pavements include, among others: BBTM (French for Beton Bitumineux Tres Mince), SDA (Semi-Dense Asphalt), PA (Porous Asphalt), noise reduced stone mastic asphalt SMA LA (German for Lärm Arm), PERS (Poroelastic Road Surface) [ 2 ]. Research has shown that the use of such mixtures for the wearing course of road pavements allows the reduction of noise to 10–12 dB [ 3 , 4 ]. Asphalt mixtures from this group are characterized by air void content in the range of 15–25%.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Behavior of Low-Noise Asphalt Mixtures with Modified Binders under Sinusoidal Loading

2022

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The paper presents the results of tests of the stiffness modulus according to the 4PB-PR method of low-noise asphalt mixtures with the addition of rubber granulate (RG). Mixtures of this type are characterized by an increased air void content (about 10–25%). This causes a rapid bitumen oxidation, which results in oxidative hardening, contributing to a faster deterioration of the properties of the mixtures. This means that binders of appropriate quality should be used in the process of producing asphalt mixtures, which will provide the mixtures with sufficiently high technical properties. The tested asphalt mixtures are differentiated according to the type of bitumen modifiers: styrene–butadiene–styrene copolymer (SBS) and crumb rubber (CR). The article presents the tests results of the stiffness modulus using the 4PB-PR method. This test has a high correlation with regard to “in situ” tests. The research proved that each of the modifiers used increased the stiffness modulus of low-noise asphalt mixtures. Replacing the mineral aggregate with 30% RG leads to a tenfold decrease in the stiffness modulus. In the entire range of analyzed temperatures, mixtures with the use of modifiers show higher values of the elastic component of the stiffness modulus, as evidenced by lower values of the phase angle.

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Investigation of Acoustic Properties of Poroelastic Asphalt Mixtures in Laboratory and Field Conditions

Cited by 9 publications

References 21 publications

Effect of Lane Narrowing Implemented on an Urban Dual Carriageway on Speed Reduction and Acoustic Environment

Effect of Lane Narrowing Implemented on an Urban Dual Carriageway on Speed Reduction and Acoustic Environment

Bitumen-Based Poroelastic Pavements: Successful Improvements and Remaining Issues

Analysis of the Behavior of Low-Noise Asphalt Mixtures with Modified Binders under Sinusoidal Loading

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