Evolution microstructurale des composites du systeme ciment alumineux-granulat calcaire. II. Influence sur la porosite et les resistances mecaniques

✍ Scribed by A. Bachiorrini; M. Murat

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 287 KB
• Volume: 17
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(87)90003-2

✦ Synopsis

The analysis of the evolution of mechanical strengths of different composite materials based on aluminous cement has allowed the authors to point out two phenomena : I. a noticeable improvment in strength by the use of calcareous aggregates or fillers due to the formation of a transitional layer rich in hydrated monocarboaluminate which grows and develops at the aggregate (or fillers) -cement matrix interface, 2. a direct connection between mechanical strengths and a porosity of the material, named "critical porosity", which corresponds, in the present case, to pores with diameter higher than lOtO00 angstroms.