01020469

Component

https://doi.org/10.3141/1946-18

http://scholar.google.com...Real&publication_year=2006

Longitudinal joint cracking is one of the most prevalent forms of distress in asphalt concrete pavements. The joint area does not achieve the same density as the mat because of an unconfined edge on the initial pass and a cold joint during the second pass. The lower density allows water to penetrate, and the material cracks, usually within a year of construction. There are many techniques for constructing longitudinal joints; one is to preheat the joint before paving the second lane. A field study conducted in New Hampshire used an infrared joint heater on the base, binder, and surface layers of a full-depth hot-mix asphalt pavement. Thermocouples were embedded in the pavement to determine the extent of heat penetration from the infrared heaters. Cores were taken along the joint and in the travel lanes for both control and infrared test sections. Density and strength measurements taken on the cores show some statistically significant improvements in the joint constructed by using the infrared heater. Permeability measurements along the control and test joints were performed and show average differences between the two sections. Cracking surveys on the binder and surface layers performed 1 year after construction showed that the section of pavement where the infrared heater was used has significantly less cracking than the control section.

01031140

English

pp 157-162

2006

Transportation Research Record: Journal of the Transportation Research Board

0309099544

Print

Figures (3) ; Photos (1) ; References (10) ; Tables (3)

Asphalt concrete pavements; Base course (Pavements); Density; Infrared heating; Longitudinal cracking; Longitudinal joints; Pavement joints; Pavement performance; Permeability; Preheating; Road construction; Surface course (Pavements)

New Hampshire

Construction; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I52: Construction of Pavements and Surfacings

PRP, TRIS, TRB, ATRI

Mar 3 2006 10:23AM

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