EXPANSION MECHANISM ASSOCIATED WITH THE SECONDARY FORMATION OF THE U PHASE IN CEMENT-BASED SYSTEMS CONTAINING HIGH AMOUNTS OF NA2SO4

Authors
LI G LEBESCOP P MORANVILLE M
Citation
G. Li et al., EXPANSION MECHANISM ASSOCIATED WITH THE SECONDARY FORMATION OF THE U PHASE IN CEMENT-BASED SYSTEMS CONTAINING HIGH AMOUNTS OF NA2SO4, Cement and concrete research, 26(2), 1996, pp. 195-201
Citations number
9
Categorie Soggetti
Construcion & Building Technology","Material Science
Journal title
Cement and concrete research → ACNP
ISSN journal
00088846
Volume
26
Issue
2
Year of publication
1996
Pages
195 - 201
Database
ISI
SICI code
0008-8846(1996)26:2<195:EMAWTS>2.0.ZU;2-Y
Abstract
The degradation of concrete by sulfates is generally related to the fo rmation of AFt, but in some cases such as the cement stabilised wastes with a high amount of sulfates, the U phase is formed. This paper stu dies the influence of the U phase formation on the expansion of the C( 3)A+C3S+Na2SO4 system. It is shown that the U phase is formed by an ex ternal water supply and this reaction process results in a large expan sion.