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Title:

DEVELOPMENT IN QUALITY CONTROL OF CONCRETE DURING CONSTRUCTION

Accession Number:

00264913

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/issn/03611981

Abstract:

New methods of quality control of concrete during pavement construction have successfully been corried out in Switzerland on all main road projects since 1969. A combined quantitative and qualitative microscopic analysis has been carried out on thin slices of 2-day-old concrete in more than 800 tests. Quantitative analysis determines tha determines the frost-salt (F-S) resistance. In addition to the spacing factor, nine other factors are being considered. The evaluation of F-S resistance foresees a subdivision in five groups according to the durability factor. The qualitative, morphological control analysis is done on the same slice and at the same time the quantitative analysis is carried out. The morphological quality control determines precisely the faults in the concrete as well as their causes. It also makes it possible to rectify these faults during further construction. Concrete will medium or low F-S resistance (according to the quantitatve analysis) or with a high percentage of morphological faults (disturbance factor greater than or equal to -10) is controlled by a frost-thaw-salt (F-T-S) resistance test with rapid cycles. This new Dobrolubov-Romer (D-R) method mades rapid testing of concrete possible (500 cycles within a fortnight). Practical application of control on site during construction is demonstrated.

Supplemental Notes:

Publication of this paper sponsored by Committee on Performance of Concrete-Physical Aspects. 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:

PORTLAND CEMENT CONCRETE

Monograph Accession #:

00080085

Authors:

Wilk, W
Dobrolubov, G
Romer, B

Pagination:

pp 1-26

Publication Date:

1974

Serial:

Transportation Research Record

Issue Number: 504
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

53rd Annual Meeting of the Highway Research Board

Location: Washington District of Columbia, United States
Date: 1974-1-21 to 1974-1-25

ISBN:

0309022959

Media Type:

Digital/other

Features:

Figures (43) ; Photos; References (1)

Uncontrolled Terms:

Rapid methods; Site investigation

Subject Areas:

Construction; Highways

Files:

TRIS, TRB

Created Date:

May 1 1975 12:00AM

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