Mais informações

SAVASTANO JUNIOR, H.; WARDEN, P. G.; COUTTS, R. S. P. Low-cost matrices for cellulose-cement materials. In: CIB SYMPOSIUM ON CONSTRUCTION E ENVIRONMENT: THEORY INTO PRACTICE, 2000, São Paulo. Anais… São Paulo, 2000.
Clique no nome do(s) autor(es) para ver o currículo Lattes:

Dados do autor na base InfoHab:
Número de Trabalhos: 2 (Nenhum com arquivo PDF disponível)
Citações: 2
Índice h: 1  
Co-autores: 3

Abstract

Ground iron blast-furnace slag (BFS) activated by a mixture of gypsum and hydrated lime was examined as an alternative binder to ordinary Portland cement (OPC) for fibre-cement products. BFS and OPC were also individually blended with a granitic filler available as a waste from the aggregates industry. Refined P. radiata kraft pulp, at a loading of 4% by mass, was used as the reinforcing fibre to allow comparison with the well documented data that exists relating to softwood fibre reinforced OPC performance for civil construction. Composite production employed a slurry/vacuum de-watering stage, followed by pressing and air curing. The flexural properties of the materials were measured at 28 days after fabrication. BFS composites displayed acceptable performance (modulus of rupture - MOR = 15.3 MPa, fracture toughness - FT = 0.56 kJ.m - ² ) when compared with corresponding OPC based materials (MOR = 18.3 MPa, FT = 0.57 kJ.m - ² ). Microstructure analysis was helpful in understanding the diverse fracture behaviour displayed by the composites during failure. The mechanical properties of composites based on either binder type were similar when granitic filler was incorporated in the matrix. MOR ranged from 12.5 to 13.9 MPa and FT from 0.41 to 0.53 kJ.m - ² , with the best results achieved with formulations containing 75% binder:25% filler. The physical properties of BFS-granitic filler blend based composites were similar to those of BFS composites (water absorption - WA ~25% by mass and density - D ~1.5 g.cm - ³ ), the same being observed for OPC-granitic filler blend and OPC based composites (WA ~17.5%w/w and D ~1.7 g.cm - ³ ). For the range of composites analysed, BFS and OPC alternative matrices showed potential for the production by a Hatschek type process of fibre-cement materials suitable for low-cost housing in developing countries.
-