Journal ArticleDOI
Role of Bending Beam Rheometer Parameters in Thermal Stress Calculations
TLDR
In this article, the role played by the stiffness and the m-value in the development of thermal stresses in asphalt pavements was investigated, and the analysis showed that thermal stress magnitude was strongly related to the stiffness magnitude.Abstract:
The development of the Strategic Highway Research Program lowtemperature binder specifications was based on the observation that asphalt mixture creep stiffness at 2 h correlated well with instances of transverse cracking. With the correlation extended to asphalt binder stiffness and with time-temperature superposition, a maximum stiffness value was imposed on the binders, and a limiting temperature at which the stiffness at 60 s reached the limiting value was selected as a specification criterion. In addition, the slope at 60 s of the stiffness-versus-time curve on a double logarithmic scale, the so-called m-value, was introduced as an additional criterion. The role played by the stiffness and the m-value in the development of thermal stresses in asphalt pavements was investigated. The analysis showed that thermal stress magnitude was strongly related to the stiffness magnitude. At similar stiffness levels, higher m-values resulted in the faster development of thermal stresses.read more
Citations
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Journal ArticleDOI
Bending beam rheometer testing of asphalt mixtures
TL;DR: In this paper, a test protocol for performing creep tests on asphalt mixture beam specimens using the bending beam rheometer is provided, and a detailed sample preparation procedure is presented and experimental data are provided to assess the consistency of this method.
Journal ArticleDOI
Using combined Avrami-Ozawa method to evaluate low-temperature reversible aging in asphalt binders
TL;DR: In this paper, the authors evaluate the reversible aging resistance of asphalt binders and comprehend the effects of low-temperature gradually hardening on fundamental properties of asphalt bounding boards.
Journal ArticleDOI
Performance Evaluation of Joint and Crack Sealants in Cold Climates Using DSR and BBR Tests
TL;DR: In this paper, the authors examined a laboratory evaluation method based on two laboratory tests that are commonly used for testing asphalt binders: dynamic shear rheometer (DSR) and bending beam rheometers (BBR).
Journal ArticleDOI
Characterizing the Low-Temperature Performance of Hot-Pour Bituminous Sealants Using Glass Transition Temperature and Dynamic Stiffness Modulus
Haithem Soliman,Ahmed Shalaby +1 more
TL;DR: In this paper, a characterization method for joint and crack sealants based on dynamic testing at low-temperatures is introduced. But the method is limited to the case of hot-pour bituminous sealants.
Journal ArticleDOI
Mining multiple association rules in LTPP database: An analysis of asphalt pavement thermal cracking distress
TL;DR: In this paper, the authors mine multiple association rules for thermal cracking in seasonal freezing zones, including 36 potential influence factors, were collected from 339 samples from 46 Long-Term Pavement Performance (LTPP) sections in 6 US states and 3 Canadian provinces.
References
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Journal ArticleDOI
On Creep and Relaxation
I. L. Hopkins,R. W. Hamming +1 more
TL;DR: In this paper, the creep function for the National Bureau of Standards polyisobutylene at 25°C was calculated from the relaxation function, using the integral equation connecting them, and the calculated function was shown to be correct in its initial slope, to satisfy the inequality φ(t)ψ(t )⩽1 throughout, and to approach satisfactorily the independently determined asymptote.
Predicting thermal cracking of pavements from binder properties: theoretical basis and field validation
TL;DR: In this paper, a semi-empirical mechanistic approach was proposed to determine the critical cracking temperature of asphalt pavements using stiffness data from the Bending Beam Rheometer (BBR) to predict thermal stress.