João Alvito


Structural behavior of connectors on CBPB panels

This dissertation is a study of the use of CBPB (Cement-Bonded ParticleBoards) as a structural material and ascertains whether it has the capability to resist, as a structural element, tensile loads. Various tests are shown related to the tensile strength of the CBPB aswell as it’s behaviour in various types of connections. There is also the research of it’s linear thermal expansion coefficient.
The CBPB is a composite material composed of cement and wood and is today marketed in Portugal by VIROC. The CBPB is usually used as insulation material, although there are other wood-cement composites that are used as a substitute to wood in countries with hot and humid climates.
The mechanical resistance of this material depends on the type of wood used, the binder material, cement setting, and the woo:cement ratio. The CBPB is a material with heavy resistance to humidity, fungi, termites and fire. In this dissertation there were tested various CBPB pieces consisting of Portland cement type II (CEM II / A-L42,5R), Pinus pinaster and Pinus pinea wood, sodium silicate and aluminium sulphate.
The CBPB showed an average tensile strenght of 7 MPa. And it was determined a linear thermal expansion coefficient of 1.15x10^(-5) ºC.