Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement
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 materia...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/8/1973 |
| _version_ | 1797569890870099968 |
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| author | Krzysztof Robert Czech Wladyslaw Gardziejczyk |
| author_facet | Krzysztof Robert Czech Wladyslaw Gardziejczyk |
| author_sort | Krzysztof Robert Czech |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T20:17:43Z |
| format | Article |
| id | doaj.art-c822115286474cd0920d38e54709e8c5 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T20:17:43Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-c822115286474cd0920d38e54709e8c52023-11-19T22:28:19ZengMDPI AGMaterials1996-19442020-04-01138197310.3390/ma13081973Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of MeasurementKrzysztof Robert Czech0Wladyslaw Gardziejczyk1Department of Geotechnics and Structural Mechanics, Bialystok University of Technology, 15-351 Bialystok, PolandDepartment of Construction and Road Engineering, Bialystok University of Technology, 15-351 Bialystok, PolandStiffness 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.https://www.mdpi.com/1996-1944/13/8/1973dynamic stiffnesswearing coursebituminous mixturestest stand |
| spellingShingle | Krzysztof Robert Czech Wladyslaw Gardziejczyk Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement Materials dynamic stiffness wearing course bituminous mixtures test stand |
| title | Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement |
| title_full | Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement |
| title_fullStr | Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement |
| title_full_unstemmed | Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement |
| title_short | Dynamic Stiffness of Bituminous Mixtures for the Wearing Course of the Road Pavement—A Proposed Method of Measurement |
| title_sort | dynamic stiffness of bituminous mixtures for the wearing course of the road pavement a proposed method of measurement |
| topic | dynamic stiffness wearing course bituminous mixtures test stand |
| url | https://www.mdpi.com/1996-1944/13/8/1973 |
| work_keys_str_mv | AT krzysztofrobertczech dynamicstiffnessofbituminousmixturesforthewearingcourseoftheroadpavementaproposedmethodofmeasurement AT wladyslawgardziejczyk dynamicstiffnessofbituminousmixturesforthewearingcourseoftheroadpavementaproposedmethodofmeasurement |