00368165

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http://onlinepubs.trb.org...s/trr/1982/849/849-003.pdf

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During the last two decades, full-width granular construction filter courses; improved ditching, trenches, and drains; and axle-load controls have all been implemented on Ontario highways. In spite of this, pavement damage during late winter and spring continues to be a problem for the Ontario Ministry of Transportation and Communications. This paper illustrates how this problem is compounded in seasonal frost areas. During warm winter days, melt-water from deicing salts enters the partly thawed base. Trapped there by frozen subbases and shoulders, it creates differential heaving during subsequent freezing periods. Two experiments carried out to explore the problem of pavement edge cracking are described briefly. These tests include the use of plastic pavement edge skirts and partial-width paved shoulders. The success and practicality of the paved shoulders prompted the Ministry to use them on a continuing basis. The Ministry has been using plastic pipe pavement edge drains since 1978 to improve the drainage of rigid pavements. Details are given on how the drains are placed with trenchless plows; an innovative and very successful installation technique. The Ministry's limited use of open-graded drainage layers is touched on briefly. In the area of preventive maintenance, the discussion centers on preliminary studies on the use of primed and surface-treated shoulders as waterproofing measures. Routing and sealing of cracks has also become a significant feature of the Ministry's program in upgrading the performance of pavements and prolonging the life of overlays. (Author)

Publication of this paper sponsored by Committee on Subsurface Design. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411652

pp 18-24

1982

Transportation Research Record

0309033527

Print

Figures (11) ; Photos (7) ; References (11)

Defects; Drainage; Freeze thaw durability; Frost; Melting; Pavement distress; Pavements; Pipe; Plastics; Preventive maintenance; Road shoulders; Surface treating; Tubing

Edges

Ontario, Canada

Ontario, Canada

Geotechnology; Highways; Hydraulics and Hydrology; Pavements; I42: Soil Mechanics

TRIS, TRB

Dec 30 1982 12:00AM

• LABORATORY AND FIELD STUDIES OF CHANNELING AND PUMPING
• PUMPING MECHANISMS OF FOUNDATION SOILS UNDER RIGID PAVEMENTS
• SIMULATING PAVEMENT PERFORMANCE UNDER VARIOUS MOISTURE CONDITIONS
• SUBBASE PERMEABILITY AND PAVEMENT PERFORMANCE