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Showing 1 to 20 of 91 for “"hot mix asphalt"”.
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High Reclaimed Asphalt Pavement in hot mix asphalt
… the existing pavement, known as Reclaimed Asphalt Pavement (RAP) is ripped up, milled, and stockpiled and can be used in the creation of new mixes in order to save money and resources. New Jersey state specifications limit the percentage of RAP that can be used to 15% for surface courses …
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Evaluation of interlayer bonding in hot mix asphalt pavements
… a loss of bond between lifts of the surface hot mix asphalt (HMA) layer. FWD tests had been performed at locations throughout the pavement, on a monthly basis for the duration of the loading period. The FWD data, along with detailed material property data, was available through the FAA …
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Non-contact Methods for Detecting Hot-mix Asphalt Nonuniformity
Segregation, or non-uniformity, in Hot Mix Asphalt (HMA) induces accelerated pavement distress(es) that can reduce a pavement's service life up to 50%. Quality Assurance procedures should detect and quantify the presence of this problem in newly constructed pavements. Current practices are usually …
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Hot Mix Asphalt Permeability: Tester Size Effects and Anisotropy
Permeability of hot mix asphalt (HMA) is a property that is important to the pavement's durability. Measuring permeability along with density will give a better indication of a pavement's durability than density alone. The presence of water for extended periods of time in the pavement is directly …
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Performance of hot mix asphalt using peat modified asphalt binder
… fibers among others, are introduced to be mixed with asphalt. This study was conducted to investigate the use of parit Nipah peat (PNpt) to be mixed with asphalt, both of unaged and aged conditions to improve the performance of asphalt mix. The physical properties, storage stability and …
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Comparison of Creep Compliance Master Curve Models for Hot Mix Asphalt
Creep compliance of Hot Mix Asphalt (HMA) is an important property to characterize the material's viscoelatic behavior. It is used to predict HMA thermal cracking at low temperature and permanent deformation at high temperatures. There are several experimental methods to measure the creep …
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Develop a Laboratory Mixing Procedure For Hot Mix Asphalt Containing RAP Materials
AbstractThe use of reclaimed asphalt pavement (RAP) has become more prevalent with the rising costs of virgin materials and the recent push to develop more environmentally friendly and sustainable roadways. The use of RAP decreases the costs of constructing new pavements by limiting the amount of …
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Material Characteristics of Hot Mix Asphalt and Binder Using Freeze-Thaw Conditioning
… important parameters in the study of damage in asphalt pavement. In areas of wide ranging temperatures, pavements are susceptible due to thermal cracking. This study investigates the effect of freeze-thaw on fatigue life and material characteristics of Hot Mix Asphalt (HMA) and binder. Since, …
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Evaluation of field performance of fine-graded hot mix asphalt on Illinois' roadways
Coarse-Graded Hot Mix asphalt has been utilized as the standard mix for asphalt projects across transportation agencies. Primarily, this was due to the idea that that a coarser gradation could be more rut resistant than a fine-graded mix. Fine-graded mixes were determined to be tender mixes due to …
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Development of Laboratory to Field Shift Factors for Hot-Mix Asphalt Resilient Modulus
Resilient moduli of different surface mixes placed at the Virginia Smart Road were determined. Testing was performed on Field cores (F/F) and laboratory-compacted plant mixed (F/L), laboratory mixed and compacted per field design (L/L), and laboratory designed, mixed, and compacted (D/L) specimens. …
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Modeling reflective cracking development in hot-mix asphalt overlays and quantification of control techniques
Hot-mix asphalt (HMA) overlay is regarded as an efficient method to rehabilitate moderately deteriorated pavements. Despite the application of an adequately designed overlay, when HMA overlays are built on jointed concrete pavement (JCP) or a cracked surface, reflective cracking can develop shortly …
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Optimizing the Use of Reclaimed Asphalt Pavement (RAP) in Hot Mix Asphalt Surface Mixes
The most common use of reclaimed asphalt pavement (RAP) is in the lower layers of a pavement structure, where it has been proven as a valid substitute for virgin materials. Instead, the use of RAP in surface mixes is more limited, with a major concern being that the high RAP mixes may not perform …
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Development of a Mechanistic-Based Approach to Evaluate Critical Conditions of Hot Mix Asphalt Mixtures
The performance of an asphalt pavement is significantly impacted by the properties of the asphalt mixture, pavement structure, and the imposed environmental and traffic loading conditions. In particular, hot mix asphalt (HMA) mixtures are believed to have a critical combination of temperature and …
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Comparison of Surface Characteristics of Hot-Mix Asphalt Pavement Surfaces at the Virginia Smart Road
… surfaces. Seven different wearing surface mixtures, placed at the Virginia Smart Road pavement facility, were studied over a one year time period for both friction and texture properties. A locked wheel skid trailer and a laser profilometer were used to assess the pavement surface …
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Short-term Comparison of Frictional Properties of Superpave and Balance Mix Design Hot Mix Asphalt Mixes
Hot Mix Asphalt (HMA) design has undergone years of development. Currently, many state agencies use the Superpave mix design method. While the Superpave mix design improved rutting, the implemented level 1 only considered volumetric properties and not mixture performance tests. Therefore, …
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Performance Comparison of PG 64-22 versus PG 64-28 Asphalt in Hot Mix Asphalt Placed in Connecticut
… Comparison of PG 64-22 versus PG 64-28 Asphalt in Hot Mix Asphalt Placed in Connecticut</strong></p> <p><strong>Abstract</strong></p> <p>Eight test sections were constructed on Route 59 (Easton) and Route 341 (Kent) in Connecticut in 2006. Within each location there were two sections …
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Concepts for Mechanistic-Empirical Design Procedure for Extended Life Hot Mix Asphalt Pavements With a Multi-Layered Structure
The load pulse duration generated by two FWDs (Dynatest and KUAB) was around 34 milliseconds. There was not a significant difference between the devices. The horizontal tensile strain pulse duration is not affected significantly by the thickness and multi-layered system of the pavements studied.
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The effect of hydrated lime on moisture susceptibility and aging of hot mix asphalt: mastic to mixture scale
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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Feasibility of the Use of Two Spent blast Materials as Aggregate in Hot Mix Asphalt in Louisiana Post-Katrina
Using spent abrasive blast material (ABM) in hot mix asphalt to replace part of the fine aggregates used in the production of conventional hot mix asphalt has several environmental benefits. First, onsite storage of spent ABMs negatively impact neighboring properties because the fine materials are …
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Development of differential scheme micromechanics modeling framework for predictions of hot-mix asphalt (HMA) complex modulus and experimental validations
The viscoelastic modulus of hot-mix asphalt (HMA) such as the complex modulus, E*, is an essential material parameter for better paving mixture design and asphalt pavement design. Under certain circumstances, it is desirable that a reasonable modulus value of certain HMA mixtures be estimated for …
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