High-strength concrete exposed to elevated temperature - spalling and protection

Title: High-strength concrete exposed to elevated temperature - spalling and protection
Author(s): H. Li, Y.L. Wong, X. Yan
Paper category : conference
Book title: International Conference on Advances in Concrete and Structures
Editor(s): Ying-shu Yuan, Surendra P. Shah and Heng-lin Lü
Print-ISBN: 2-912143-41-1
e-ISBN: 2351580176
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 461 - 466
Total Pages: 6
Nb references: 8
Language: English

Abstract: 
An experimental investigation on spalling of high-strength concrete with different moisture contents (40%, 60%, 100%) and different types of coarse aggregates (gravel and pebble) was conducted at a heating rate of 10°C/min up to 800°C. Specimens with polypropylene fibers and Metamax fibers (2D and 5D) were also heated under the same heating regime. Residual compressive strengths were tested on specimens subject to high temperature. Results indicate explosive spalling was not observed in specimens with pebble aggregates but occurred in the ones with gravel aggregates of 100% moisture content. There appeared more micro-cracks on the surface and had a more than 10% compressive strength reduction of specimens with pebble aggregates relative to the ones with gravel aggregates. The presence of polypropylene and 2D Metamax fibers exhibited a perfect protection on spalling of high-strength concrete.

Online publication: 2003-08-10
Publication type : full_text
Public price (Euros): 0.00