Thermal Segregation of Asphalt Material in Road Repair

Byzyka, Juliana; Rahman, Mujib; Chamberlain, Denis A.

doi:10.3850/978-981-11-0449-7-117-cd

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Asphalt mixture temperatures, wind velocity and environmental conditions at the time of the repair will affect this rapid decrease in temperature. Furthermore, fast cooling can be mainly observed in the edges of the repair due to cold underlying asphalt layer resulting in low dense interfaces and weak points prone to premature failure (Dong et al 2014, Byzyka et al 2017b.…”

Section: Introductionmentioning

confidence: 99%

An improved interface temperature distribution in shallow hot mix asphalt patch repair using dynamic heating

Byzyka

Rahman

Chamberlain

2018

International Journal of Pavement Engineering

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This study focuses on the issue of hot mix asphalt patch repairs, the performance of which is greatly reduced by repair edge disintegration. This is caused by low interface temperatures which result in poor repair bonding between fill material and host pavement. Twenty-four pothole repairs, 45 mm in depth, comprising 12 static and 12 dynamic repairs heated for 10 min 15 s and 21 min 49 s, respectively have been investigated. Dynamic heating has been completed using an experimental infrared heater. Temperatures were measured at 11 locations on the repair interfaces during the pouring and compaction of the fill mix. Volumetric of asphalt mixtures were also investigated. The results demonstrated that for static repairs, the lowest maximum temperatures were located at corners and on vertical repair boundaries. It was found that high thermal contact resistance in these interfaces dramatically affect the temperature levels. However, the figures improved in dynamically heated repairs. Comparing dynamically heated repairs of 10 min 15 s and 21 min 49 s with static repairs, showed average corner temperatures increase 10.85-24.45°C and 29.51-36.73°C, respectively, with accompanying increases in vertical interface temperatures 34.97°C and 46.41°C, respectively. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

An improved interface temperature distribution in shallow hot mix asphalt patch repair using dynamic heating

Byzyka

Rahman

Chamberlain

2018

International Journal of Pavement Engineering

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“…Recent research, which includes observations on pothole repair production and detailed monitoring of them, indicates that many repairs commence failing within a short time after completion (Byzyka et al, 2016). This failure is usually caused by five main parameters named as improper transportation method, thermal segregation, inadequate compaction, insufficient bonding between the host and the new hot mix asphalt, and improper pothole geometry preparation.…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional finite element analysis of temperature distribution in hot mix asphalt pothole repair

Byzyka¹,

Rahman²,

Chamberlain³

2017

Bearing Capacity of Roads, Railways and Airfields

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The reported research focuses on the problematic lack of durability in executed pothole repairs, much of which arises from inadequate heating of the host pavement during the repair process. A threedimensional finite-element analysis is used to model the temperature distribution in hot mix asphalt (HMA) pothole repairs. Nine pothole repair models are developed including both shallow and deep potholes. Low and high temperatures are applied to a 3D pavement structure and HMA pothole repair mix. Observations are made on (a) the effect of combinations of the existing host pavement temperature regime and that of the HMA placed to fill the pothole, (b) the rate of temperature change during process (a), and (c) the effect of pothole repair depth on temperature change following repair filling. Outcomes demonstrate that boundaries of the formed repair cool substantially faster than the central region and that repair thickness has a substantial influence on this.

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“…Due to the defect of design standard, the durability of concrete is insufficient. The cost of maintenance is increasing continuously which causes huge economic loss [2,3]. Therefore, studying the effect of dynamic flexural loading and dry-wet cycles on chloride ions diffusion in concrete is of great significance for ensuring the safe operation of concrete works in the chloride enrichment area, and accurately predicting and improving the service life of the project.…”

Section: Introductionmentioning

confidence: 99%

Developing a Model for Chloride Ions Transport in Cement Concrete under Dynamic Flexural Loading and Dry‐Wet Cycles

Guan

Yang

et al. 2017

Mathematical Problems in Engineering

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Chloride ions attack is the main factor leading to the degradation of concrete durability, while the diffusion process would be significantly aggravated under the dynamic flexural loading and dry-wet cycles. In this paper, the influence coefficients of dynamic flexural loading on chloride/water diffusion coefficients were established, based on the relationship between the dynamic flexural loading and the chloride ions diffusion coefficient of concrete. Based on the model of chloride ions transporting in dry-wet cycle environment, the transport model of chloride ions in concrete under the dynamic flexural loading and dry-wet cycles was established. The effects of different factors on the chloride ions transport law in concrete were analyzed through laboratory test. The results showed that the model was in good agreement with the experimental results. The theory and assumptions proposed applied in the model of chloride ions transport in concrete under the dynamic flexural loading and dry-wet cycles had certain rationality and scientificity.

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Thermal Segregation of Asphalt Material in Road Repair

Abstract: h i g h l i g h t s Thermal segregation is developed in patching in both winter and summer seasons. Long haulage time of HMA progresses thermal segregation. Poor insulation measures of HMA during transportation raises thermal segregation.

Cited by 4 publications

References 2 publications

An improved interface temperature distribution in shallow hot mix asphalt patch repair using dynamic heating

An improved interface temperature distribution in shallow hot mix asphalt patch repair using dynamic heating

A three-dimensional finite element analysis of temperature distribution in hot mix asphalt pothole repair

Developing a Model for Chloride Ions Transport in Cement Concrete under Dynamic Flexural Loading and Dry‐Wet Cycles

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