|
|
|
Title: EVALUATION OF THE FROST RESISTANCE OF ROLLER-COMPACTED CONCRETE PAVEMENTS
Accession Number: 00474225
Record Type: Component
Availability: Find a library where document is available Abstract: An investigation was conducted to evaluate the frost resistance of samples taken from roller-compacted concrete (RCC) pavements with laboratory testing procedures. Nine existing pavements were sampled and tested for microscopic determination of air-void content and parameters of the air-void system, resistance to rapid freezing and thawing, critical dilation, and compressive and flexural strength. The pavements ranged in age from 1 month to 8 years at the time of sampling. Results of the rapid freezing-and-thawing tests indicate that the frost resistance of the concrete is, as might be expected, a function of the bubble spacing factor (L) of the air-void system. Those samples having L's smaller than 0.011 in. generally had durability factors (DFE300) of 60 or greater. Those samples having L's greater than 0.016 in. generally had DFE300's less than 40. The samples having L's less than 0.016 in. also contained approximately 2.0 to 4.0 percent, by volume, of air voids; in the sections that were counted, chord lengths that were less than 0.04 in. long but irregularly shaped were found. The presence of larger-than-anticipated amounts of small air voids appears to be related to cohesiveness of the mixture, pugmill mixing, and the method of compaction. Preliminary results of the dilation tests indicate that those samples judged to be frost susceptible when tested by rapid freezing and thawing may, in fact, offer some degree of frost resistance. The dilation test may be appropriate, therefore, to determine whether an RCC sample is frost resistant at the time of test or to measure the period of frost immunity.
Supplemental Notes: Publication of this paper sponsored by Committee on on Soil-Portland Cement Stabilization. and on Rigid Pavement Construction and Rehabilitation. 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
Monograph Title: Roller-compacted concrete pavements and concrete construction Monograph Accession #: 01418772
Authors: Ragan, Steven APagination: pp 25-32
Publication Date: 1986
Serial: ISBN: 0309040566
Media Type: Print
Features: Figures
(2)
; Photos
(2)
; References
(6)
; Tables
(7)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I32: Concrete
Files: TRIS, TRB
Created Date: Oct 31 1987 12:00AM
More Articles from this Serial Issue:
|
