Assessing low temperature properties of asphalt materials by means of static testing techniques

Wistuba, M; Mollenhauer, Konrad; Metzker, K

doi:10.1201/9780203865286.ch36

Cited by 6 publications

(2 citation statements)

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“…Each spectrum is beforehand normalized by following the procedure described in [16] . For analyzing the aging effect on the resistance against low-temperature cracking, of the asphalt mix properties, thermal stress restrained specimen tests (TSRST) and uniaxial tensile stress test (UTST) according to prEN 12697-46 were applied [17,18] . Results of the combined evaluation of these tests are the paths of cryogenic stress σ cry (T) evolving due to prohibited thermal shrinkage, the tensile strength β t (T) and the tensile strength reserve Δβ t (T) versus temperature T. The analysis of the parameters cracking temperature T F and failure stress σ F , and strength and temperature at maximum tensile strength reserve Δβ t,max and T(Δβ t,max ) was illustrated in Fig.2, Right).…”

Section: Test Methodsmentioning

confidence: 99%

Development and validation of a laboratory aging method for the accelerated simulation of reclaimed asphalt

Mollenhauer

Piérard

Tušar

et al. 2010

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The paper presented first results elaborated during the European Research Project Re-road which aims at the development of techniques for increasing the recycling rates of reclaimed asphalt. During service life surface asphalt courses are subjected to aging due to oxidation effects which causes the hardening of the binder and thereby a change in the chemical, physical and mechanical properties of the material. Surface courses often contain highly modified binders as well as special additives for improving the performance characteristics. As these layers inhibit the shortest service lives compared to other road construction layers every year high amounts of reclaimed surface asphalt are available for recycling. The question is raised how the reclaimed asphalt consisting of high quality and costly material components can be recycled for optimal added value. To analyze the asphalt mix service life performance and its recyclability during mix design a laboratory method was developed to simulate the real in-situ aging. First the effects of site aging on the binder and asphalt characteristics were presented. Three laboratory aging methods were discussed which aimed the accelerated aging which meets similar property changes as site aging. At last the effects of two different laboratory aging methods on the same SMA mixture were compared.

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Section: Test Methodsmentioning

confidence: 99%

Development and validation of a laboratory aging method for the accelerated simulation of reclaimed asphalt

Mollenhauer

Piérard

Tušar

et al. 2010

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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“…The TSRST was further developed by Jung and Vinson as part of the Strategic Highway Research Program (SHRP) [ 11 ], and the influence of bitumen type, aging, and cooling rate on TSRST results was investigated. Many studies have indicated that the method has good sensitivity to low-temperature mixture design [ 12 , 13 ]. Additionally, Zaumanis et al [ 14 ] stated that TSRST failure temperature variability was significantly smaller than the variability of Semi-Circular Bending (SCB) test fracture toughness, and TSRST distinguished different mixtures much clearer than the SCB test.…”

Section: Introductionmentioning

confidence: 99%

Field Evaluation of High Modulus Asphalt Concrete Resistance to Low-Temperature Cracking

2022

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High-modulus asphalt concrete has numerous advantages in comparison to conventional asphalt concrete, including increased resistance to permanent deformations and increased pavement fatigue life. However, previous studies have shown that the construction of road pavements with High Modulus Asphalt Concrete (HMAC) may significantly increase the risk of low-temperature cracking. Those observations were the motivation for the research presented in this paper. Four test sections with HMAC used in base and binder courses were evaluated in the study. Field investigations of the number of low-temperature cracks were performed over several years. It was established that the number of new low-temperature cracks is susceptible to many random factors, and the statistical term “reversion to the mean” should be considered. A new factor named Increase in Cracking Index was developed to analyze the resistance of pavement to low-temperature cracking. For all the considered field sections, samples were cut from each asphalt layer, and Thermal Stress Restrained Specimen Tests were performed in the laboratory. Correlations of temperature at failure and cryogenic stresses with the cracking intensity observed in the field were analyzed. The paper provides practical suggestions for pavement designers. When the use of high modulus asphalt concrete is planned for binder course and asphalt base, which may result in lower resistance to low-temperature cracking of pavement than in the case of conventional asphalt concrete, it is advisable to apply a wearing course with improved resistance to low-temperature cracking. Such an approach may compensate for the adverse effects of usage of high modulus asphalt concrete.

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Development and application of asphalt binder relaxation test in different dynamic shear rheometers

Büchner

Ryś

Trifunović

et al. 2023

Construction and Building Materials

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Assessing low temperature properties of asphalt materials by means of static testing techniques

Cited by 6 publications

References 0 publications

Development and validation of a laboratory aging method for the accelerated simulation of reclaimed asphalt

Development and validation of a laboratory aging method for the accelerated simulation of reclaimed asphalt

Field Evaluation of High Modulus Asphalt Concrete Resistance to Low-Temperature Cracking

Development and application of asphalt binder relaxation test in different dynamic shear rheometers

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