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Alkali-aggregate reaction : presented at the Thirty-sixth Annual Meeting, January 7-11, 1957.

Author: National Research Council (U.S.). Highway Research Board.
Publisher: Washington : Highway Research Board, 1958.
Series: National Research Council (U.S.).; Publication; Bulletin (National Research Council (U.S.). Highway Research Board), no. 171.
Edition/Format:   Print book : EnglishView all editions and formats
Database:WorldCat
Summary:
Paper 1: Since its publication in 1947, the quick chemical test for alkali reactivity of concrete aggregate has been used by many laboratories. The significance and reliability of the test are evaluated in the light of experience. Paper 2: The magnitude and polarity of the excess ionic charge on various Portland cements has been determined by a procedure which used the silver-ammonia-bromide complex as the indicator  Read more...
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Document Type: Book
All Authors / Contributors: National Research Council (U.S.). Highway Research Board.
OCLC Number: 6774518
Description: 36 pages : illustrations, graphs ; 25 cm.
Contents: Evaluation of the quick chemical test for alkali reactivity of concrete aggregate --
Miscellaneous observations on the alkali-aggregate reaction and the ionic charge on hydrated cement --
Pressures developed in cement pastes and mortars by the alkali-aggregate reaction.
Series Title: National Research Council (U.S.).; Publication; Bulletin (National Research Council (U.S.). Highway Research Board), no. 171.

Abstract:

Paper 1: Since its publication in 1947, the quick chemical test for alkali reactivity of concrete aggregate has been used by many laboratories. The significance and reliability of the test are evaluated in the light of experience. Paper 2: The magnitude and polarity of the excess ionic charge on various Portland cements has been determined by a procedure which used the silver-ammonia-bromide complex as the indicator ion, and it appears that this ionic charge may be a contributing factor in the swelling and shrinking of hydrated cement. Paper 3: Measurements with a special pressure cell, using an SR-4 strain gage as the sensitive element, show that the alkali-aggregate reaction in cement pastes and mortars may develop pressures in excess of 2,000 PSI.

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