56. Micro analytical investigations on the effect of polypropylene fibres in fire exposed high-performance concrete (HPC)

Title: 56. Micro analytical investigations on the effect of polypropylene fibres in fire exposed high-performance concrete (HPC)
Author(s): F. Dehn, K. Wille
Paper category : conference
Book title: 6th International RILEM Symposium on Fibre Reinforced Concretes
Editor(s): M. di Prisco, R. Felicetti and G.A. Plizzari
Print-ISBN: 2-912143-51-9
e-ISBN: 2912143748
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 659 - 668
Total Pages: 10
Nb references: 4
Language: English

Abstract: The development of cement based materials has reached a permanent upside trend within the former decades. From the point of time, the last step in this development row is high-performance concrete (HPC). The concrete recipes have to be developed according to the application case, if the high efficiency and the costs shall be considered together. One aspect which is not sufficiently cleared for such cementitious materials is their spalling behaviour and the fire resistance. One passable way to reduce the spalling on a tolerable mass is the use of plastic fibres, e.g. polypropylene fibres. However, up to know only phenomenological characterizations exist which back up the positive effects of such fibres with regard to fire-exposed HPC.
The paper will give a general survey on the spalling mechanisms due to fire exposure as well as an overview on tests which are focused on micro analytical investigations on the effect of polypropylene fibres in fire-exposed HPC. Therefore, several micro analytical test methods were used, such as DTG, DTA, REM, stereo microscopy and XRD to make it possible to describe the mechanisms of permeability increase within the dense matrix, the pores structure and the interfacial transition zone between matrix, aggregates and fibres.

Online publication: 2004-08-30
Publication type : full_text
Public price (Euros): 0.00