00372283

Component

http://onlinepubs.trb.org...s/trr/1982/885/885-001.pdf

https://scholar.google.co...erts&publication_year=1982

A procedure that can be used by an engineer to design a recycled mixture by using material salvaged from an existing roadway is described. Special attention is directed toward quality-assurance factors that must be addressed to ensure that variations are kept within limits that will allow production of a mixture that will perform satisfactorily. Some of these quality-assurance factors are commonly overlooked and yet can dramatically affect the field performance of the material. Among these commonly overlooked factors are determining the causes of failures, locating sections with different characteristics, and developing a sampling plan for collecting material for laboratory studies based on the first two factors. After the causes of distress have been determined, the salvaged material is evaluated to determine whether softening agents are needed and whether virgin aggregate and asphalt should be added and, if so, how much. Also included are cautions for preparing candidate mixturs in the laboratory in a manner similar to field material processing. Suggested minimum values of engineering properties are included as well as sample plots to demonstrate areas of concern relative to quality assurance. Concerns for quality assurance in each step of the design process are summarized. (Author)

Publication of this paper sponsored by Committee on Quality Assurance and Acceptance Procedures. 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.

01411679

pp 1-7

1982

Transportation Research Record

0309034728

Print

Figures (10) ; References (13)

Additives; Asphalt mixtures; Failure; Mix design; Quality assurance; Recycled materials; Sampling; Softening point

Causes

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

TRIS, TRB

May 31 1983 12:00AM

• DEVELOPMENT OF MULTICHARACTERISTIC ACCEPTANCE PROCEDURES FOR RIGID PAVEMENT
• ENSURING QUALITY IN HOT-MIX RECYCLING
• ENSURING QUALITY OF RECYCLED ASPHALT CONCRETE
• INTEREST ON CAPITAL INVESTED IN CONSTRUCTION AS DELAY DAMAGES
• METHOD TO ESTABLISH PAY SCHEDULES FOR RIGID PAVEMENT