Impact of lowered laboratory compaction rate on strength properties of asphalt mixtures

Vacková, Pavla; Valentin, Jan; Kotoušová, Adriana

doi:10.1007/s41062-017-0111-6

Cited by 7 publications

(8 citation statements)

References 1 publication

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“…Insufficiently compacted asphalt layers are more susceptible to deeper water penetration and more intensive asphalt oxidation and, as a consequence, to faster surface degradation. On the contrary, excessively compacted asphalt pavements are more susceptible to permanent deformations and low-temperature cracking [39].…”

Section: Bulk Density and Compaction Indexmentioning

confidence: 99%

“…This is probably due to the over-compaction of the asphalt mix. A further consequence of excessively "dense" mixtures is a decrease in resistance to permanent deformations and low-temperature cracking [39]. It was also observed that asphalt mix has reduced strength characteristics if the air void content is above the required limits.…”

Section: Water and Frost Resistancementioning

confidence: 99%

“…Asphalt changes its properties as a result of oxidation processes and, as time passes, asphalt surfaces become even stiffer and consequently more susceptible to low temperature cracks and premature degradation [39,56]. Therefore, controlling the stiffness of the designed asphalt mix is a factor that can prevent early defects of the surface.…”

Section: Stiffness Modulusmentioning

confidence: 99%

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Laboratory Methods for Assessing the Influence of Improper Asphalt Mix Compaction on Its Performance

2020

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Compaction index is one of the most important technological parameters during asphalt pavement construction which may be negatively affected by wrong asphalt paving machine set, weather conditions, or the mix temperature. Presented laboratory study analyzes the asphalt mix properties in case of inappropriate compaction. The reference mix was designed for AC 11 S wearing layer (asphalt concrete for wearing layer with maximum grading of 11 mm). Asphalt mix samples used in the tests were prepared using Marshall device with the compaction energy of 2 × 20, 2 × 35, 2 × 50, and 2 × 75 blows as well as in a roller compactor where the slabs were compacted to various heights: 69.3 mm (+10% of nominal height), 66.2 mm (+5%), 63 mm (nominal), and 59.9 mm (−5%) which resulted in different compaction indexes. Afterwards the samples were cored from the slabs. Both Marshall samples and cores were tested for air void content, stiffness modulus in three temperatures, indirect tensile strength, and resistance to water and frost indicated by ITSR value. It was found that either insufficient or excessive level of compaction can cause negative effect on the road surface performance.

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Section: Bulk Density and Compaction Indexmentioning

confidence: 99%

Section: Water and Frost Resistancementioning

confidence: 99%

Section: Stiffness Modulusmentioning

confidence: 99%

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Laboratory Methods for Assessing the Influence of Improper Asphalt Mix Compaction on Its Performance

2020

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“…Of these design methods, due to the easy access to test equipment, the Marshall method has been widely used throughout the world since the 1940s [ 9 ]. Based on the Marshall design method, Xu [ 10 ], Lee [ 11 ], and Vackova et al [ 12 ] studied the influences of compaction energy and compaction temperature on specimen performance, including the volumetric properties, the Marshall stability, and the dynamic stability. Furthermore, several studies have been conducted to characterize the correlation of mechanical properties of laboratory specimens and site cores [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Determination of Construction Parameters of Porous Ultra-Thin Overlays Based on Laboratory Compaction Studies

et al. 2020

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To address the severe distresses of asphalt pavement, a new type of pavement maintenance treatment, porous ultra-thin overlay (PUTO) with small particle size was proposed. The PUTO has a thickness of 1.5–2.5 cm and a large void ratio of 18–25%. As a newly asphalt mixture, the structure characteristics differ from poor traditional pavement. Therefore, it is necessary to investigate the fabrication schemes in laboratory and on-site, respectively. In this study, the optimal fabrication schemes, including compaction temperature and number of blows of PUTO were determined based on Cantabro test and volumetric parameters. Then, the corresponding relationship between laboratory and on-site compaction work was then established based on the energy equivalent principle. On this basis, the numbers of on-site rolling passes and the combination method were calculated. The results show that increased compaction temperature and number of blows reduce the height and enhance the compaction of the Marshall sample. With the same temperature and number of blows, the raveling resistance of coarse gradation, Pavement Asphalt Concrete-1 (PAC-1) is better than that of fine gradation, Pavement Asphalt Concrete-2 (PAC-2), and the increased asphalt viscosity significantly improves the raveling resistance of the asphalt mixture. To ensure the scattering resistance and volumetric characteristic, the initial compaction temperature of the PAC-1 and PAC-2 should not be lower than 150 °C and 165 °C, respectively. Then, the laboratory compaction work and on-site compaction work were calculated and converted based on the principle of energy equivalence. Consequently, the on-site compaction combination of rolling machines for four asphalt mixtures was determined. According to the volumetric parameters, the paving test section proved that the construction temperature and the on-site rolling combination determined by laboratory tests are reasonable, and ultra-thin overlay has good structural stability, drainage, and skid resistance.

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“…Of these design methods, due to the easy access to test equipment, the Marshall method has been widely used throughout the world since the 1940s [9]. Based on the Marshall design method, Xu [10], Lee [11], and Vackova et al [12] studied the influences of compaction energy and compaction temperature on specimen performance, including the volumetric properties, the Marshall stability, and the dynamic stability. Furthermore, several studies have been conducted to characterize the correlation of mechanical properties of laboratory specimens and site cores [13] [14].…”

Section: Introductionmentioning

confidence: 99%

Determination of Construction Parameters of Porous Ultra-Thin Overlays Based on Laboratory Compaction Studies

Tian

Luo

Liu

et al. 2020

Preprint

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To address the severe distresses of asphalt pavement, a new type of pavement maintenance treatment, porous ultra-thin overlay (PUTO) with small particle size was proposed. The PUTO has a thickness of 1.5~2.5 cm and a large void ratio of 18~25%. As a newly asphalt mixture, the structure characteristics differ from traditional pavement. Therefore, it is necessary to investigated the fabrication schemes in laboratory and on-site, respectively. In this study, the optimal fabrication schemes, including compaction temperature and number of blows of PUTO were determined based on Cantabro test and volumetric parameters. Then, the corresponding relationship between laboratory and on-site compaction work was then established based on the energy equivalent principle. On this basis, the numbers of on-site rolling passes and the combination method were calculated. The results show that increased compaction temperature and number of blows reduce the height and enhance the compactness of the Marshall sample. With the same temperature and number of blows, the scattering resistance of coarse gradation (PAC-1) is better than that of fine gradation (PAC-2), and the increased asphalt viscosity significantly improves the scattering resistance of the asphalt mixture. To ensure the scattering resistance and volumetric characteristic, the initial compaction temperature of the PAC-1 and PAC-2 should not be lower than 150 °C and 165 °C, respectively. Then, the laboratory compaction work and on-site compaction work were calculated and converted based on the principle of energy equivalence. Consequently, the on-site compaction combination of rolling machines for four asphalt mixtures was determined. According to the volumetric parameters, the paving test section proved that the construction temperature and the on-site rolling combination determined by laboratory tests are reasonable, and ultra-thin overlay has good structural stability, drainage and skid resistance.

show abstract

Impact of lowered laboratory compaction rate on strength properties of asphalt mixtures

Cited by 7 publications

References 1 publication

Laboratory Methods for Assessing the Influence of Improper Asphalt Mix Compaction on Its Performance

Laboratory Methods for Assessing the Influence of Improper Asphalt Mix Compaction on Its Performance

Determination of Construction Parameters of Porous Ultra-Thin Overlays Based on Laboratory Compaction Studies

Determination of Construction Parameters of Porous Ultra-Thin Overlays Based on Laboratory Compaction Studies

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