Recycling of porcelain tile polishing residue in portland cement: hydration efficiency.
Environ Sci Technol
; 46(4): 2368-74, 2012 Feb 21.
Article
en En
| MEDLINE
| ID: mdl-22316267
Ceramic tiles are widely used by the construction industry, and the manufacturing process of ceramic tiles generates as a major residue mud derived from the polishing step. This residue is too impure to be reused in the ceramic process and is usually discarded as waste in landfills. But the analysis of the particle size and concentration of silica of this residue shows a potential use in the manufacture of building materials based on portland cement. Tests were conducted on cement pastes and mortars using the addition of 10% and 20% (mass) of the residue. The results of compressive strength in mortars made up to 56 days showed a significant increase in compressive strength greater than 50%. The result of thermogravimetry shows that portlandite is consumed by the cement formed by the silica present in the residue in order to form calcium silicate hydrate and featuring a pozzolanic reaction. This effect improves the performance of cement, contributes to research and application of supplementary cementitious materials, and optimizes the use of portland cement, reducing the environmental impacts of carbon dioxide emissions from its production.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Industria de la Construcción
/
Materiales de Construcción
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Porcelana Dental
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Reciclaje
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Residuos Industriales
Idioma:
En
Revista:
Environ Sci Technol
Año:
2012
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Estados Unidos