Affiliation:
1. Composite Materials Research Laboratory, University at Buffalo, The State University of New York Buffalo, NY 14260-4400, USA
Abstract
Steel fibre (8 μm diameter, 0·72 vol.%)-reinforced cement was found to be effective for resistance heating. A DC electrical power input of 5·6 W (7·1 V, 0·79 A) resulted in a maximum temperature of 60°C (initial temperature = 19°C) and a time of 6 min to reach half the maximum temperature. Efficiency of energy conversion increased with time of heating, reaching 100% after 50 min. The heat power output per unit area was 750 W/m2 for steel fibre cement, compared with 340 W/m2 for a metal wire with the same resistance. The use of carbon fibres or graphite particles in place of steel fibres resulted in less effective heating, due to the higher resistivity.
Subject
General Materials Science,Building and Construction
Cited by
53 articles.
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