Effective Compactible Time of Asphalt Pavement

Temperature is one of the major factors that affect the compactability and mechanical performance of asphalt pavement. Therefore, the cooling rate variability of asphalt due to various surrounding conditions and aggregate surface areas is crucial to achieving proper compaction. This study focused on the effect of environmental exposure on the cooling rate and available time for compaction of the asphalt mixtures (AC10 and AC14). Several factors, such as base and ambient temperatures, daytime and nighttime, solar flux, and wind speed, were considered in the evaluation of the cooling curve. A few loose samples were prepared and grouped as covered (with canvas) and uncovered during the monitoring process. The time and temperature of both samples were monitored during the day and night, starting after the mixing process and ending at 80 °C. Results reveal that the cooling rate of asphalt mixtures is undoubtedly affected by the surrounding factors. The use of canvas and coarse aggregate gradation could retain the heat and minimize the wind and solar flux effects, thus increasing the available time for compaction or lengthening the cooling time. In addition, the cooling rate tends to increase during nighttime compared with daytime exposure.

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Compaction Process Control of Asphalt Pavement

Gao

Shi

Zhang

et al. 2018

Advances in Civil Engineering Materials

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The quality of compaction is important to the performance of hot mixed asphalt (HMA) pavement. Most premature failures of asphalt pavement are the consequence of poor compaction. The process control method of compaction was studied here. The allowable compaction time of HMA pavement was estimated through field measurement and computer simulation. An instantaneous compaction procedure was recommended according the environment conditions and behaviors of compaction machines. The passing route of each roller was obtained using the global positioning system real-time kinematic technique. High quality compaction was achieved by controlling the operation of rollers. A pavement compaction process monitoring system was introduced to collect all the compaction information, such as the passing numbers of rollers, paving speed of pavers, and area of pavement not be compacted in time and so on. Alarm messages would be sent to roller operators, contractors, and managers when any improper operations occurred during compaction.

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Effective Compactible Time of Asphalt Pavement

Cited by 3 publications

References 1 publication

New method for making and selecting the compaction plan of asphalt pavement based on compaction quality and carbon emissions

New method for making and selecting the compaction plan of asphalt pavement based on compaction quality and carbon emissions

Effect of Environmental Exposure on the Cooling Rate of Asphalt Mixtures

Compaction Process Control of Asphalt Pavement

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