Gonçalo Faria
in
Comportamento Estrutural de Pilares Construídos com CBPB.
This work is part of a research project for the use of CBPB (Cement-Bonded ParticleBoards) as
structural material and aims to explore the possibility to use CBPB as structural elements, predominantly subjected to compressive forces – columns. In this dissertation issues related to the compressive strength of CBPB, the behaviour of some types of connections and proposals for the detailing of columns, are studied.
The cement- bonded particleboards (CBPB) are marketed in Portugal by VIROC. At present, the CBPB is used as a finishing material.
The physical and mechanical characteristics of composites depend on the type of wood, cement and curing, the inhibition index and the wood: cement ratio. The CBPB is a material resistant to biological attack and, in some conditions, may be dimensionally unstable.
This study aims to evaluate the compressive behaviour of CBPB consisting of Portland cement type II (CEM II / A-L 42,5R), Pinus pinaster and Pinus pinea wood, sodium silicate and aluminium sulphate.
In relation to compression, the CBPB showed a mean and characteristic resistance of 24 MPa and 18 MPa, respectively. The crushing average strength in bolted connections is around 50 to 60 MPa.