Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/32830
Title: Comparison of the strength and durability performance of normal- and high-strength pozzolanic concretes at elevated temperatures
Authors: Poon, CS 
Azhar, S
Anson, M
Wong, YL
Keywords: Compressive strength
High temperature
Microstructure
Permeability
Pozzolan
Issue Date: 2001
Source: Cement and concrete research, 2001, v. 31, no. 9, p. 1291-1300 How to cite?
Journal: Cement and Concrete Research 
Abstract: The strength and durability performance of normal- and high-strength pozzolanic concretes incorporating silica fume, fly ash, and blast furnace slag was compared at elevated temperatures up to 800°C. The strength properties were determined using an unstressed residual compressive strength test, while durability was investigated by rapid chloride diffusion test, mercury intrusion porosimetry (MIP), and crack pattern observations. It was found that pozzolanic concretes containing fly ash and blast furnace slag give the best performance particularly at temperatures below 600°C as compared to the pure cement concretes. Explosive spalling occurred in most high-strength concretes (HSCs) containing silica fume. A distributed network of fine cracks was observed in all fly ash and blast furnace slag concretes, but no spalling or splitting occurred. The high-strength pozzolanic concretes showed a severe loss in permeability-related durability than the compressive strength loss. Thirty percent replacement of cement by fly ash in HSC and 40% replacement of cement by blast furnace slag in normal-strength concrete (NSC) was found to be optimal to retain maximum strength and durability after high temperatures.
URI: http://hdl.handle.net/10397/32830
ISSN: 0008-8846
DOI: 10.1016/S0008-8846(01)00580-4
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

163
Last Week
0
Last month
0
Citations as of Apr 1, 2017

WEB OF SCIENCETM
Citations

129
Last Week
0
Last month
1
Citations as of Apr 21, 2017

Page view(s)

24
Last Week
0
Last month
Checked on Apr 23, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.