Hot mix asphalt design prediction and field performance, an arizona study

This paper presents case studies of the short-term field performance and material property evolution of four warm-mix asphalt (WMA) projects in Iowa, Louisiana, Montana, and Tennessee, constructed in 2011 and 2012. Each project had one or several WMA overlay sections and a control hot-mix asphalt (HMA). Two rounds of performance investigations were conducted, including a survey of field distress and characterization of material properties. Field cores from the two rounds (the first immediately after construction, the second 2 to 3 years after construction) were used to evaluate the performance of the mixtures in terms of dynamic modulus, creep compliance, fracture testing at intermediate and low temperatures, and the Hamburg wheel-tracking test. The following tests were also used to evaluate the extracted asphalt binders: performance grading, multiple stress creep recovery, and monotonic fracture at two temperatures. This study showed that the material properties (rutting and cracking resistance) evolved over time for both the HMA and WMA pavements; however, pavement maintenance (e.g., chip seals) affected this evolution. In general, the material properties of WMA and HMA pavements for the second-round samples were consistent with those of the first-round samples.

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Evaluating Field Performance: Case Study Including Hot Mix Asphalt Performance-Related Specifications

Journal of Transportation Engineering ◽

10.1061/(asce)0733-947x(2004)130:2(251) ◽

2004 ◽

Vol 130 (2) ◽

pp. 251-260 ◽

Cited By ~ 5

Author(s):

Adam J. Hand ◽

Amy Epps Martin ◽

Peter E. Sebaaly ◽

Dean Weitzel

Keyword(s):

Hot Mix Asphalt ◽

Field Performance ◽

Asphalt Performance

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Assessment of Distress in Conventional Hot-Mix Asphalt and Asphalt–Rubber Overlays on Portland Cement Concrete Pavements

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198105192900103 ◽

2005 ◽

Vol 1929 (1) ◽

pp. 20-27

Author(s):

Maria Carolina Rodezno ◽

Kamil E. Kaloush ◽

George B. Way

Keyword(s):

Portland Cement ◽

Large Scale ◽

Hot Mix Asphalt ◽

Field Performance ◽

Fatigue Cracking ◽

Pavement Performance ◽

Portland Cement Concrete ◽

Cement Concrete ◽

Asphalt Rubber ◽

Design Guide

The purpose of this study is to assess the way distresses are predicted by using the new Mechanistic–Empirical Design of New and Rehabilitated Pavement Structures (design guide), developed under NCHRP Project 1–37A. Two pavement sections were used: a conventional hot-mix asphalt reconstruction and an asphalt–rubber overlay on a portland cement concrete (PCC) pavement. The design guide does not include rehabilitation design for asphalt–rubber overlays. However, many large-scale asphalt–rubber overlays on interstate highways in Arizona have been built and monitored for performance, providing an opportunity to determine to what degree the design guide can predict their performance. The input data for both types of pavements were derived from two different projects on the same highway, Interstate 40. The actual data measurements that summarize the pavement performance were compared with calculated values obtained by using the design guide. Three pavement performance parameters were evaluated on the basis of the available data: rutting, cracking, and international roughness index (IRI). Rutting was one of the distresses that the design guide predicted more accurately. The fatigue cracking prediction, evaluated with Level-3 data input, was not accurate; future analysis should consider calibrated fatigue models for the different mixtures. The predicted IRI results differed from the actual measured field performance because of inaccurate distress prediction. The Arizona experience using asphalt–rubber overlays to rehabilitate aged PCC pavements has been successful. For that reason, a calibration process that allows the use of the asphalt–rubber mixtures in the design guide should be considered in the future.

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Construction and field performance of hot mix asphalt with moderate and high RAP contents

Bearing Capacity of Roads, Railways and Airfields ◽

10.1201/9780203865286.ch143 ◽

2009 ◽

Author(s):

P Turner ◽

B Powell ◽

N Tran ◽

R West ◽

A Kvasnak

Keyword(s):

Hot Mix Asphalt ◽

Field Performance

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Device for Measuring Shear Resistance of Hot-Mix Asphalt in Gyratory Compactor

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/1723-15 ◽

2000 ◽

Vol 1723 (1) ◽

pp. 116-124 ◽

Cited By ~ 22

Author(s):

Murat Guler ◽

Hussain U. Bahia ◽

Peter J. Bosscher ◽

Michael E. Plesha

Keyword(s):

Hot Mix Asphalt ◽

Low Cost ◽

Design Procedure ◽

Field Performance ◽

Shear Resistance ◽

Asphalt Mixtures ◽

Interactive Effects ◽

Continuous Measure ◽

Highly Sensitive ◽

The Relationship

The development of a gyratory load-cell and plate assembly (GLPA) to measure the shear resistance of hot-mix asphalt mixtures is described. The GLPA is a simple tool that allows the measurement of the eccentricity of the resultant load applied by the gyratory compactor in real time during compaction. The GLPA is inserted on top of the mixture specimen in the compaction mold, requiring no changes in the compaction procedure. The results from the GLPA give a continuous measure of the resistance of asphalt mixtures to shearing under gyratory loading at a fixed angle. On the basis of a simplified analysis, it is hypothesized that the bulk shear resistance estimated from the GLPA is a good indicator of the compactibility of asphalt mixtures and their potential resistance to rutting under traffic. The shear resistance and volumetric characteristics of a number of trial mixtures fabricated in the laboratory were tested to show the utility of the GLPA. The results show that the shear resistance is highly sensitive to gradation, asphalt content, and temperature. They also indicate that there are interactive effects of these factors that are independent of the volumetric properties. Although the relationship between the results of the GLPA and the field performance of mixtures is yet to be determined, this device has the potential to be a low-cost and effective tool to complement the current volumetric mixture design procedure. It provides a tool to measure an important mechanical property that is a good indicator of bulk shear resistance of asphalt mixtures.

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