ISSN: 0149-6123
Page Count: 5

Determination of Blast-Furnace Slag Content in Hardened Concrete by Electrical Conductivity Methods
Beaudoin, JJ
Section head and principal research officer, National Research Council, Institute for Research in Construction, Materials Laboratory, Ontario

Gu, P
Research scientists, University of Ottawa, Ontario

Xie, P
Research scientists, University of Ottawa, Ontario

Fu, Y
Research scientists, University of Ottawa, 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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