Results 181 to 190 of about 48,998 (225)

Determination of Lime in Hot-Mix Asphalt

Transportation Research Record: Journal of the Transportation Research Board, 2006
Lime is added to hot-mix asphalt to mitigate stripping and other modes of moisture damage. No standard forensic test exists for the measurement of the lime content after it has been incorporated in the asphalt. This paper evaluates several methods to quantify the amount of hydrated lime (calcium hydroxide) in asphalt.
Terry S. Arnold, Muriel Rozario-Ranasinghe, Jack Youtcheff   +2 more
openaire   +1 more source

Detection of Stripping in Hot-Mix Asphalt

Transportation Research Record: Journal of the Transportation Research Board, 2006
Damage mechanisms that lead to stripping significantly affect the dynamic modulus and tensile strength of hot-mix asphalt (HMA). When stripped HMA is unexpectedly encountered below the planned milling depth during routine mill and overlay rehabilitation projects, it must be removed and replaced; this causes significant cost overruns and delays.
Michael I. Hammons, Harold Von Quintus, Georgene M. Geary, Peter Y. Wu, David M. Jared   +4 more
openaire   +1 more source

Microstructure Index of Hot Mix Asphalt

Road Materials and New Innovations in Pavement Engineering, 2011
Digital image processing technique is used to quantify the impact of aggregate gradation and compaction method on air voids distribution and aggregate orientation and distribution. The air voids distribution was found to be sensitive to water permeability than traditional volume indexes.
Yue-jing Lv, Lei Zhang, Xing-lin Zhou
openaire   +1 more source

Micromechanical Simulation of Hot Mix Asphalt

Journal of Engineering Mechanics, 1997
A model based on the discrete element method (DEM), ASBAL, was developed by modifying the TRUBAL program to simulate hot mix asphalt (HMA). To represent asphalt cement, several viscoelastic elements (i.e., Maxwell, Kelvin-Voigt, and Burger's elements) were considered. The research results from the Strategic Highway Research Program (SHRP) were used for
Kuo-Neng G. Chang, Jay N. Meegoda
openaire   +1 more source

Bimodular Analysis of Hot-Mix Asphalt

Road Materials and Pavement Design, 2010
In this paper, the bimodular (different tensile and compressive moduli) stress distribution in the IDT specimen is determined for different compressive to tensile modulus ratios. The difference between the modulus calculated from the IDT test assuming Hondros' linear elastic stress distribution, and the compressive and tensile moduli is then obtained ...
Samer W. Katicha, Gerardo W. Flintsch, Amara Loulizi   +2 more
openaire   +1 more source

Quality Assurance of Hot-Mix Asphalt

Transportation Research Record: Journal of the Transportation Research Board, 2006
Quality assurance is the process by which highway construction elements are sampled and tested to ensure compliance with specifications and other project requirements. The results of contractor-performed tests, originally performed for quality control purposes, are increasingly used in the acceptance decision in many states.
Rod E. Turochy, J. Richard Willis, Frazier Parker   +2 more
openaire   +1 more source

Changes of asphalt fumes in hot-mix asphalt pavement recycling

Journal of Cleaner Production, 2020
Abstract Hot-mix asphalt pavement recycling is widely practiced for its economic and environmental benefits. Existing studies are mainly focused on the engineering properties of reclaimed asphalt pavement (RAP) materials, without considering their impacts on the generated asphalt fumes—a widely recognized environmental hazard.
Shicong Mo, Yuhong Wang, Feng Xiong, Chunjin Ai, Dawei Wang, Giin Yu Amy Tan   +5 more
openaire   +1 more source

Long term performance of warm mix asphalt versus hot mix asphalt

Journal of Central South University, 2013
The fatigue behavior, indirect tensile strength (ITS) and resilient modulus test results for warm mix asphalt (WMA) as well as hot mix asphalt (HMA) at different ageing levels were evaluated. Laboratory-prepared samples were aged artificially in the oven to simulate short-term and long term ageing in accordance with AASHTO R30 and then compared with ...
Ziari Hasan, Behbahani Hamid, Izadi Amir, Nasr Danial   +3 more
openaire   +1 more source

The spatial approach of hot mix asphalt

Sixth International RILEM Symposium on Performance Testing and Evaluation of Bituminous Materials, 2003
Asphalt structures have to comply with requirements from different parties involved and for changing conditions. This compliance is realised by properties and composition of the basic materials. Several methods have been developed for defining these properties and optimising composition. Broad classes that can be distinguished are: empirical models for
openaire   +1 more source

Utilization of an Asphalt Pavement Analyzer for Hot Mix Asphalt Laboratory Mix Design

Journal of ASTM International, 2005
Abstract The Superpave volumetric mix design system, developed by SHRP in the 1990s, has continued to gain widespread acceptance across the United States. Although it is widely believed to be an improvement over past mix design systems, it does have an inherent flaw.
RC Williams, DW Hill, MP Rottermond
openaire   +1 more source