TRB Pubsindex
Text Size:
x

« Prev Next »

Return to Results | New Search

Bookmark and Share

Title:

USE OF MATURITY AND PULSE VELOCITY TECHNIQUES TO PREDICT STRENGTH GAIN OF RAPID CONCRETE PAVEMENT REPAIRS DURING CURING PERIOD

Accession Number:

00676696

Record Type:

Component

Availability:

Find a library where document is available


Order URL: http://worldcat.org/isbn/0309060656

Abstract:

Rapid strength gain concrete repair mixtures that cure within 4 to 12 hr were used to carry out full-depth slab repairs on a section of Interstate highway. The mixtures included a calcium-chloride accelerated mix, a very early strength mix developed by the Strategic Highway Research Program, and a "fast-track" mix previously used for early opening of concrete intersections. Before carrying out the repairs, job materials and mix designs were obtained and used to develop correlations between pulse velocity, maturity, and early strength of concrete. Maturity functions based both on Nurse-Saul and Arrhenius (equivalent age) approaches were developed. To account for heat rise of the concretes in actual sections, laboratory correlations were carried out by curing test cylinders in a specially insulated curing box. Pulse velocity and maturity functions were used to predict in situ strength gain of concrete in instrumented test repair sections. Temperatures were monitored through the depths of the test slabs during the initial 8 hr of curing. Temperatures at mid-depth ranged from 60 deg C to 70 deg C (140 deg F to 160 deg F) for these mixes. After 4 hr of curing, the very early strength mix exceeded 14 MPa (2,000 psi) compressive strength, as determined by in situ methods. The other two mixes gained strength at a slower rate.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1458, Concrete Research. 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:

Concrete research

Monograph Accession #:

01401262

Language:

English

Authors:

Okamoto, P A
WHITING, D

Pagination:

p. 85-90

Publication Date:

1994

Serial:

Transportation Research Record

Issue Number: 1458
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309060656

Features:

Figures (6) ; References (12) ; Tables (2)

Old TRIS Terms:

Subject Areas:

Data and Information Technology; Highways; Materials; I32: Concrete

Files:

TRIS, TRB, ATRI

Created Date:

Apr 28 1995 12:00AM

More Articles from this Serial Issue: