The effectiveness of supplementary cementing materials in suppressing expansion due to ASR: Another look at the reaction mechanisms; Part 2: Pore solution chemistry. [Alkali-Silica Reaction]

Journal Article · Sat Jan 01 04:00:00 EST 1994 · Cement and Concrete Research; (United States)

DOI:https://doi.org/10.1016/0008-8846(94)90047-7· OSTI ID:7283897

Duchesne, J; Berube, M A ^[1]

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1. Univ. Laval, Quebec City, Quebec (Canada). Dept. de Geologie

Pore solution chemistry (high pressure extraction method) of cement pastes made with two condensed silica fumes, three pulverized fly ashes and one ground granulated blast furnace slag was measured after 7, 28, 84, 182, 364 and 545 days of curing (38 C and 100% R.H.). Results were compared to expansions obtained for a 2 year time period in the CAN/CSA A23.2-14A Concrete Prism Method for concrete specimens made with two very alkali-silica reactive aggregates and tested at the same conditions and water/cement/SCM (supplementary cementing materials). A long-term threshold in alkali hydroxide concentration was observed around 0.65N, below which no significant expansion occurred in corresponding concretes. The lower the SCM alkali content and the concrete alkali content as well, and the higher the SCM content, the easier this limit is satisfied.

• OSTI ID: 7283897
• Journal Information: Cement and Concrete Research; (United States), Journal Name: Cement and Concrete Research; (United States) Vol. 24:2; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
AEROSOL WASTES
ASHES
BUILDING MATERIALS
CEMENTS
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
EXPANSION
FLY ASH
MATERIALS
MATERIALS TESTING
RESIDUES
SLAGS
TESTING
WASTE PRODUCT UTILIZATION
WASTES