Petrography study of two siliceous limestones submitted to alkali-silica reaction

Journal Article · Tue Aug 15 04:00:00 EDT 2006 · Cement and Concrete Research

DOI:https://doi.org/10.1016/j.cemconres.2006.03.025· OSTI ID:20871565

Monnin, Y ^[1]; Degrugilliers, P ^[1]; Bulteel, D ^[1]; Garcia-Diaz, E ^[1]

---

1. Departement Genie Civil, Ecole Nationale Superieure des Techniques Industrielles et des Mines de Douai, 941, Rue Charles Bourseul, B.P. 10838, F-59508 Douai (France)

This study presents the contribution of petrography to the comprehension of the alkali-silica reaction mechanism applied to two siliceous limestones. A petrography study was made on the two aggregates before reaction to define their relative proportions and types of reactive silica and to observe their distribution in the microstructure. Then a model reactor, constituted by the reactive siliceous limestone aggregate, portlandite and NaOH, was used to measure the swelling due to reaction of the silica with alkalis and the free expansion of the aggregates. The volume evolution between both aggregates was very different and could be explained by the preliminary petrographic study. It appears that the swelling of the aggregates is conditioned by the microstructure of the carbonated matrix, the quantity and the distribution of the reactive silica.

• OSTI ID: 20871565
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 8 Vol. 36; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DISTRIBUTION
EXPANSION
LIMESTONE
MICROSTRUCTURE
PETROGRAPHY
REACTION KINETICS
SILICA
SODIUM HYDROXIDES
SWELLING