AGGREGATE EXPANSIVITY DUE TO SULFIDE OXIDATION .1. REACTION SYSTEM AND RATE MODEL

Authors
CASANOVA I AGULLO L AGUADO A
Citation
I. Casanova et al., AGGREGATE EXPANSIVITY DUE TO SULFIDE OXIDATION .1. REACTION SYSTEM AND RATE MODEL, Cement and concrete research, 26(7), 1996, pp. 993-998
Citations number
7
Categorie Soggetti
Construcion & Building Technology","Material Science
Journal title
Cement and concrete research → ACNP
ISSN journal
00088846
Volume
26
Issue
7
Year of publication
1996
Pages
993 - 998
Database
ISI
SICI code
0008-8846(1996)26:7<993:AEDTSO>2.0.ZU;2-X
Abstract
Oxidation and hydration of sulfides in aggregate materials can yield t o expansive reactions that affect the durability of concrete. This pro cess is, in principle, independent from the potential alkali-aggregate reactivity, and the oxidation of the sulfide is the rate-limiting rea ction. A model is presented to evaluate the kinetic evolution of expan sion due to sulfide oxidation, and subsequent sulfate attack on the pa ste.