00666227

Component

http://onlinepubs.trb.org...trr/1994/1434/1434-005.pdf

https://scholar.google.co...AJEK&publication_year=1994

Pavement drainage layers have been proved to be highly effective in the efficient and quick dissipation of subsurface water from a pavement structure. The Ministry of Transportation of Ontario requires a 100-mm lift of open-graded drainage layer (OGDL) directly beneath the concrete slab as part of the rigid pavement design for expressway facilities. The gradation of the OGDL consists almost entirely of coarse aggregates retained on the 4.75-mm sieve, which provides a highly permeable drainage layer. Because of this uniformly graded coarse aggregate, the drainage layer has proved difficult to construct by conventional means. In order to alleviate this problem, the OGDL is treated with 1.8% asphalt cement to increase the stability of the material during construction. The addition of an asphalt cement binder has been used successfully on numerous contracts. In 1990, the Ministry initiated a demonstration project to evaluate alternative methods of increasing the constructability of the OGDL. The three types of OGDL placed on this project were (a) a 1-km section of portland cement-treated OGDL with various cement contents [cement-treated permeable base (CTPB)], (b) a 1-km section where no binder was used but the amount of fine aggregate passing the 4.75 mm was increased to improve the stability [untreated permeable base (UTPB)], and (c) the asphalt cement-treated permeable base (ATPB) as just mentioned. The design and construction details are elaborated on in this paper, and the OGDL sections are evaluated in terms of permeability, gradation, constructability, and stability on the basis of falling weight deflectometer test results.

This paper appears in Transportation Research Record No. 1434, Subsurface Drainage, Soil-Fluid Interface Phenomena, and Management of Unpaved Surfaces. 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

01401242

English

p. 29-36

1994

Transportation Research Record

0309055113

Figures (10) ; References (6) ; Tables (3)

Aggregate gradation; Coarse aggregates; Construction; Drainage; Evaluation; Falling weight deflectometers; Open graded aggregates; Pavement design; Pavement performance; Pavements; Paving; Permeability; Rigid pavements; Stability (Mechanics); Subsurface drainage

Constructability

Construction; Design; Geotechnology; Highways; Hydraulics and Hydrology; Pavements; I22: Design of Pavements, Railways and Guideways; I42: Soil Mechanics

TRIS, TRB

Sep 16 1994 12:00AM

• ACCELERATED GROUNDWATER TRANSPORT STUDIES USING A GEOTECHNICAL CENTRIFUGE
• ALKALINE LEACHATE AND CALCAREOUS TUFA ORIGINATING FROM SLAG IN A HIGHWAY EMBANKMENT NEAR BALTIMORE, MARYLAND
• CHARACTERIZATION OF BASE AND SUBBASE IRON AND STEEL SLAG AGGREGATES CAUSING DEPOSITION OF CALCAREOUS TUFA IN DRAINS
• DETERMINATION OF ORIGINAL FREE LIME CONTENT OF WEATHERED IRON AND STEEL SLAGS BY THERMOGRAVIMETRIC ANALYSIS
• DEVELOPMENT AND COMPARISON OF PERMEABILITY MEASUREMENT TECHNIQUES FOR JOINTED CONCRETE PAVEMENT BASES
• DRAINABILITY OF GRANULAR BASES FOR HIGHWAY PAVEMENTS
• FACTORS INFLUENCING THE TRANSFERABILITY OF MAINTENANCE STANDARDS FOR LOW-VOLUME ROADS
• INSTITUTIONAL ASPECTS OF ENVIRONMENTAL MANAGEMENT IN ROAD DEVELOPMENT
• MOLDING WATER CONTENT AND HYDRAULIC CONDUCTIVITY OF COMPACTED SOILS SUBJECTED TO FREEZE/THAW
• OPERATIONAL UNPAVED ROAD MANAGEMENT SYSTEM IN THE CAPE PROVINCE OF SOUTH AFRICA
• QUALITY ASSURANCE PROCEDURES RELATED TO ADMINISTRATION OF UNSURFACED ROADS
• SOME PHYSICAL FACTORS AFFECTING CONTAMINANT HYDROLOGY IN COLD ENVIRONMENTS