%0 Journal Article
%T Durabilit¨¦ de pates de ciments contenant du laitier d¡¯El Hadjar conserv¨¦es dans des milieux agressifs et ¨¤ des temp¨¦ratures de climat chaud Durability of cement pastes containing slag of El Hajar preserved in aggressive environments and at temperatures of hot climate
%A Behim M.
%A Clastres P.
%J MATEC Web of Conferences
%D 2012
%I 
%R 10.1051/matecconf/20120201012
%X En vue d¡¯am¨¦liorer la durabilit¨¦ des b¨¦tons durcis, notamment vis ¨¤ vis des eaux agressives telles que eau de mer, eaux sulfat¨¦es, ¡­et dans le cas d¡¯une temp¨¦rature de conservation de climat chaud (20 ¨¤ 40 ¡ãC), nous proposons d¡¯utiliser des ciments contenant 20 % (CPJ, CEM II B) ou 50 % (CHF, CEM III A) de laitier granul¨¦ moulu de haut fourneau d¡¯El Hadjar. Les essais sont r¨¦alis¨¦s sur pate pure afin de mieux suivre parall¨¨lement l¡¯¨¦volution min¨¦ralogique des m¨¦langes durcis par analyse au moyen de la diffraction des rayons X. Les indicateurs de durabilit¨¦s choisis et suivis de 1 jour ¨¤ 1 an sont les variations dimensionnelles et les r¨¦sistances m¨¦caniques en compression simple. Le pH des solutions, li¨¦s notamment ¨¤ la fr¨¦quence de renouvellement des bains, appara t comme un param¨¨tre important d¡¯agressivit¨¦. Les r¨¦sultats obtenus permettent notamment de mettre en ¨¦vidence l¡¯effet b¨¦n¨¦fique sur la durabilit¨¦ aux sulfates d¡¯un ajout aux ciments de laitier granul¨¦ ainsi qu¡¯une certaine agressivit¨¦ pour ces m¨ºmes ciments d¡¯une conservation en eau de mer ¨¤ 20¡ãC. Une temp¨¦rature de climat chaud (40¡ãC) ne modifie pas fondamentalement ces r¨¦sultats. To improve the durability of hardened concrete, especially against aggressive water such as sea water, sulphated, ¡­ and in the case of a conservation temperature of hot climate (20 to 40¡ãC) we propose the use of cements containing 20% (CPJ CEM II B) or 50% (CHF, CEM III A) granulated blast furnace slag of El Hajar. The tests are performed on cement paste in order to better follow parallely the mineralogical evolution of mixtures cured by analysis of X-ray diffraction. The Indicators of sustainability selected and followed from 1 day to 1 year, are the dimensional variation and the compressive strength simple. The pH of the solutions, especially related to the renewal frequency of the baths, appears as an important parameter of aggressiveness. The results obtained enable in particular to show the beneficial effect on the durability of the addition of slag to cement and aggressiveness of seawater at 20¡ãC on these cements. A temperature of hot climate (40¡ãC) does not fundamentally alter these results
%U http://dx.doi.org/10.1051/matecconf/20120201012