ISSN: 0149-6123
Page Count: 5

Determination of Blast-Furnace Slag Content in Hardened Concrete by Electrical Conductivity Methods
Xie, P
Research scientists, University of Ottawa, Ontario

Gu, P
Research scientists, University of Ottawa, Ontario

Fu, Y
Research scientists, University of Ottawa, Ontario

Beaudoin, JJ
Section head and principal research officer, National Research Council, Institute for Research in Construction, Materials Laboratory, Ontario

Abstract

Electrical conductivity measurements were made on concrete systems containing blast-furnace slag. It was found that the slag content significantly influenced the concrete conductivity. A linear relationship between the concrete conductivity and the slag content and the volume fraction of aggregate was established by experiment. The relationship can be expressed as follows σc=ka·ϕa+ks·(slgc)+ko where σ^c is the concrete conductivity; φ^a is the volumetric fraction of aggregate; (slg/c) is the relative content of slag by weight of cementitious materials; and ka, ks, and ka are empirical coefficients. This relationship provides a basis for the determination of slag content in hardened concrete by electrical conductivity methods.

Keywords:
concrete, portland cement, blast-furnace slag, electrical conductivity

Paper ID: CCA10341J
DOI: 10.1520/CCA10341J
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