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Component

http://onlinepubs.trb.org...trr/1988/1182/1182-003.pdf

https://scholar.google.co...cher&publication_year=1988

In West Germany, the concrete pavements of the "autobahns" are generally constructed by the slip form method, usually on top of a hydraulic- or bituminous-bound base. The thickness of these pavements has recently been increased from 22 cm (9 in.) to 24-26 cm (9.5-10 in.). To control the formation of cracks and to relieve the stresses caused by restraint of volume changes, these pavements are divided by joints into slabs 5 m (16.5 ft) long and 4.25 m (14 ft) wide. The slabs are not reinforced, and ordinary portland cement is used. The transverse joints are doweled, and the longitudinal joints are anchored. Both dowels and anchors are vibrated into the compacted concrete. The aggregates used within the concrete surface must have a high frost resistance, and at least half of the coarse aggregate has to be crushed. To withstand the effects of frost and deicing agents, the concrete must also contain entrained air. When damaged slabs are reconstructed, a high-early strength concrete containing superplasticizer is used. In summer, the reconstructed segments can be reopened to traffic in as little as 12-14 hr. When old concrete pavements are renewed, either the old concrete is broken and new pavement laid on it, or the old concrete is crushed by a breaker and used as an aggregate for the cement-bound base.

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. This paper appears in Transportation Research Record No. 1182, Concrete Pavements.

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p. 12-17

1988

Transportation Research Record

Harold Halm International Symposium on Concrete Pavement Construction, 1988, Washington, DC, USA

0309047226

Photos (13) ; References (12)

Aggregates; Air entrained concrete; Concrete pavements; Dowels (Fasteners); Driver rehabilitation; Frost susceptibility; Longitudinal joints; Pavements; Paving; Slip form paving; Superplasticizers; Thickness; Transverse joints

Anchors; Frost resistance; Pavement thickness; Rehabilitation

Germany

Construction; Geotechnology; Highways; Pavements; I52: Construction of Pavements and Surfacings

TRIS, TRB, ATRI

Aug 31 1989 12:00AM

• CONCRETE PAVEMENT CONSTRUCTION IN SPAIN
• CONCRETE PAVEMENT TECHNOLOGY IN JAPAN TODAY
• CONCRETE PAVEMENTS U.S.A.: STATE OF THE ART
• EXPERIENCE WITH CONCRETE HIGHWAYS IN THE REPUBLIC OF SOUTH AFRICA
• INTRODUCTION: THE HALM SYMPOSIUM
• PIARC GENERAL REPORT: CONSTRUCTION AND MAINTENANCE OF RIGID PAVEMENTS