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Showing 1 to 20 of 129 for “"asphalt concrete"”.
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Hydraulic properties of asphalt concrete
… to characterize the hydraulic properties of asphalt concrete. Wetting and drying water characteristic curves were measured for six asphalt concrete cores. From the water characteristic curves, it is proposed that asphalt concrete may require bi-modal sigmoid curves to represent drying. It is …
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Laboratory evaluation of cracking in asphalt concrete
Cracking is one of the major distresses in asphalt concrete leading to high maintenance and rehabilitation costs throughout the nations pavement infrastructure. Asphalt concrete is a three phase, heterogeneous composite consisting of aggregate, mastic, and air voids. Crack initiation, crack path …
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Modeling Moisture-Induced Damage in Asphalt Concrete
Moisture damage in Asphalt Concrete (AC) is not new but an unsolved problem. For decades laboratory studies have been conducted on both loose and compacted mix to understand the effects of moisture on the AC damage. Adhesive and cohesive damages are the two major types of damages occur inside the …
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Fatigue-fracture relation on asphalt concrete mixtures
… the fatigue and fracture parameters for the asphalt mixtures investigated. The study was motivated by the desire to investigate the feasibility of predicting time-consuming fatigue test results with fracture test results, which can be obtained much more rapidly. Based on the results obtained …
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Evaluation of the effect of fines on asphalt concrete
… for determining the quantities of aggregate and asphalt cement used in asphalt concrete. This research consists of the evaluation of the surface area of different aggregates used in the state of West Virginia. This factor is important because the amount of asphalt needed to coat the aggregate …
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On Dynamic Modulus of Asphalt Concrete for Moisture Damage
… in recent years for evaluating Hot Mix Asphalt (HMA) rutting and fatigue cracking performances. Indeed, the recently developed Mechanistic Empirical Pavement Design Guide (MEPDG) uses E* data for stress and strain calculation, and E*-based models for prediction fatigue and rutting …
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Laboratory investigation of fatigue endurance limits in asphalt concrete
It is believed that Hot Mix Asphalt (HMA) mixtures used in long-lasting pavements contain a threshold of strain value below which no fatigue damage occurs. This concept is known as the fatigue endurance limit (FEL). Although previous studies have shown that an endurance limit does exist for HMA …
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Mechanistic Design Concepts for Full-Depth Asphalt Concrete Pavements
A mechanistic design procedure for Full-Depth asphalt concrete AC pavements for highways is proposed and validated. The procedure is based on ILLI-PAVE, a stress dependent finite element computer program, coupled with appropriate transfer functions.
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Impact of recycled asphalt shingles on asphalt concrete characteristics
The use of recycled materials in asphalt mixtures such as reclaimed asphalt pavements (RAP) and more recently recycled asphalt shingles (RAS) have become widely accepted in the United States as a replacement for virgin asphalt binder or virgin aggregates. However, the economics and the challenges …
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Fracture characterization of thin bonded asphalt concrete overlay systems
Asphalt overlays provide an economical means for treating deteriorated pavements. Thin bonded overlay (TBO) systems have become popular options for pavement rehabilitation. In addition to functional improvements, these systems ensure a high degree of waterproofing benefits. Conventional asphalt …
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Innovative practical crack propagation measurement of asphalt concrete specimens
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Impact of laboratory simulated aging on asphalt concrete flexibility
The aging of asphalt materials is considered an important factor contributing to the deterioration of asphalt concrete (AC) pavements. Asphalt binder aging is a combination of various complex mechanisms that affect its rheological properties causing AC to become stiffer and more brittle. As a …
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Mechanistic-Empirical Modeling of Permanent Deformation in Asphalt Concrete Layers
… model (CalME), and the PErmanent Deformation of asphalt concrete layer for ROads (PEDRO) model generally showed both useful features and limitations. The M E PDG results were more accurate at the lowest material input data quality level (level 3) than at the highest (level 1). The main cause was …
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Displacement rate and temperature effect on asphalt concrete cracking potential
One of the major distresses of asphalt concrete (AC) in flexible pavements is thermal cracking alongside fatigue, weathering related cracking and rutting. Pavements in Illinois road network are highly prone to different sources of cracking because of the climatic conditions and heavy traffic loads. …
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Optimizing truck platoon spacing to minimize asphalt concrete permanent deformation
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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Laboratory assessment of asphalt concrete durability utilizing balance mix design
… guarantee its durability. Better durability of asphalt concrete (AC) pavements would translate into less maintenance and repair, better ridership quality, and reduced environmental impacts. However, in the current design practice for AC materials, little attention is given to study AC …
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Evaluation of indirect tensile strength to identify asphalt concrete rutting potential
… (SHRP) does not include any testing to evaluate asphalt mixture for resistance to permanent deformation. This prompted the National Cooperative Highway Research Program (NCHRP) to sponsor projects for the development of a simple performance test for rutting potential of asphalt mixtures. Anderson …
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Inter-laboratory variability of the Marshall test method for asphalt concrete
… Division currently uses the Marshall method for asphalt concrete mix design and quality control. Although the Marshall method will be replaced as the Division transitions to the Superpave method, in the interim, the Division will continue to use the Marshall method. The objective of this project …
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