Fire resistance of high performance concrete
Title: Fire resistance of high performance concrete
Author(s): U. Shneider
Paper category : conference
Book title: International RILEM Workshop on Durability of High Performance Concrete
Editor(s): H. Sommer
Publisher: RILEM Publications SARL
Publication year: 1994
Pages: 237 - 242
Total Pages: 6
Nb references: 1
Abstract: The fire resistance of HPC may be determined according to the ISO-Standard-Fire-Curve. The physical properties of HPC do not deviate very much from those of ordinary concrete i.e. the thermal strain, thermal conductivity, specific heat capacity and thermal diffusivity are comparable to each other. It is therefore proposed to apply the known design rules of ordinary concrete for HPC too. This holds especially for the concrete cover of reinforced concrete elements.
Irrespectively from tins proposal there are some special features of fire behaviour of HPC whlch must be taken into account if a fire design is required.
HPC is a brittle material with a low permeability and porosity containing small amounts of water. The water may be chemically bounded or embedded within adsorbed layers of CSH gel. The desorption of water from HPC requires very low vapor pressures, high temperatures or both. At temperatures above 100°C the HPC indicates the loss of vapor but compared to ordinary concrete the vaporization rates are small as the low permeabiIity prevents a rapid vapor loss.
Online publication: 1996-02-02
Publication type : full_text
Public price (Euros): 0.00