00755141

Component

https://doi.org/10.3141/1611-10

http://scholar.google.com...nske&publication_year=1998

Economic advantages and environmental benefits encourage the use of recycled materials for road construction. Usually, however, these materials have lower stiffness and strength characteristics than typically used natural materials. Because of these inferior material properties, use of recycled aggregate materials for unbound road base construction may result in increased rutting, differential settlement, and reflective crack propagation. Placement of reinforcement between the underlying soil layer and the aggregate layer has been proposed to improve the load-carrying capacity of road bases constructed from recycled aggregate materials. To investigate the viability of such an approach, finite element analyses were performed of asphalt concrete pavements with base layers consisting of reinforced unbound recycled aggregate materials. The response of such pavements was compared with that of pavements consisting of unreinforced natural aggregates. The criteria chosen for comparison were the influence of the material characteristics of the recycled aggregate and the reinforcement on the development and speed of propagation of reflective cracking in the body of the pavement. Various combinations of reinforcement and aggregate material characteristics were simulated. It was concluded that the placing of reinforcement can reduce the speed of crack propagation into the top layer, improve load spreading in the unbound base layer, and prolong the economic life of the construction.

This paper appears in Transportation Research Record No. 1611, Stabilization and Geosynthetics.

English

p. 78-85

1998

Transportation Research Record

0309064562

Figures (12) ; References (11) ; Tables (2)

Base course (Pavements); Finite element method; Geogrids; Geotextiles; Load limits; Material reinforcement; Pavement performance; Pavements; Recycled materials; Reflection cracking; Service life; Simulation

Load carrying capacity

Design; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I33: Other Materials used in Pavement Layers

TRIS, TRB, ATRI

Oct 28 1998 12:00AM

• BENEFITS OF USING GEOGRIDS FOR BASE REINFORCEMENT WITH REGARD TO RUTTING
• FORENSIC EVALUATION OF THREE FAILED CEMENT-TREATED BASE PAVEMENTS
• LABORATORY INVESTIGATION OF COAL WASTES FOR SECONDARY ROADS
• OPTIMIZING MULTIAGENT, MULTI-INJECTED SWELL MODIFIER
• RESILIENT PROPERTIES AND FATIGUE DAMAGE IN STABILIZED RECYCLED AGGREGATE BASE COURSE MATERIAL
• STABILIZATION CHARACTERISTICS OF CLAYS USING CLASS C FLY ASH
• STABILIZATION OF SULFATE-CONTAMINATED CRUSHED CONCRETE BASE WITH TYPE V CEMENT AND FLY ASH
• STABILIZATION OF WEAK CLAY WITH STRONG SAND AND GEOGRID AT SAND-CLAY INTERFACE
• TENSILE PROPERTIES OF ASPHALT OVERLAY GEOSYNTHETIC REINFORCEMENT
• USING GEOGRIDS FOR BASE REINFORCEMENT AS MEASURED BY FALLING WEIGHT DEFLECTOMETER IN FULL-SCALE LABORATORY STUDY