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Title:

INFLUENCE OF SANDS USED IN SWITZERLAND ON THE DURABILITY OF AIR-ENTRAINED CONCRETE

Accession Number:

00163032

Record Type:

Component

Availability:

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

Abstract:

The strict Swiss specifications (SNV 640464 and 670745) concerning the content of fines in air-entrained concrete used for road paving often make the use of local sands impossible. Hence, sands from distant localities, sometimes from abroad, must often be shipped at higher costs. Results of tests on air-entrained concrete made with different sands commonly used in Switzerland are summarized in this paper. The durability of concrete was tested by means of the conventional frost method and also by applying the following new methods: (a) the quantitative microscopic determination of frost-salt resistance by pore analysis; (b) the qualitative control of concrete by microscopic morphological analysis; and (c) the frost-salt test with rapid cycles of frost and thaw according to the Dobrolubov-Romer method. The results indicate that (a) among the test methods used, a correlation was obtained; (b) the non-air-entrained concrete that consisted of Gebenstorf sand ans a high content of fines failed after 20 cycles; (c) the same concrete but air-entrained resisted 300 cycles without decrease in the modulus of elasticity; (d) the air-entrained concretes that consisted of other sands and high contents of fines also reached 300 cycles with decrease in the modulus of elasticity; and (e) the air-entrained concretes that meet Swiss specifications showed the same durability after 300 cycles as the concretes that do not meet the specifications. /Author/

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 Accession #:

01411465

Authors:

Wilk, W
Dobrolubov, G

Pagination:

pp 37-43

Publication Date:

1976

Serial:

Transportation Research Record

Issue Number: 613
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

55th Annual Meeting of the Transportation Research Board

Location: Washington District of Columbia, United States
Date: 1976-1-19 to 1976-1-23

ISBN:

0309025893

Media Type:

Digital/other

Features:

Figures (11) ; References (4) ; Tables (7)

Uncontrolled Terms:

Pores

Geographic Terms:

Switzerland

Subject Areas:

Highways; Materials

Files:

TRIS, TRB

Created Date:

Oct 13 1977 12:00AM

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