SYMPOSIA PAPER Published: 01 January 1986
STP36393S

Evaluation of the Performance of Blast-Furnace Slag and Fly Ash When Blended or Mixed with Portland Cement

Source

Partial substitution of portland cement (PC) with materials such as blast-furnace slag (BFS) or fly ash (FA) affects: workability or water demand; characteristic strength at a given age; and the maturity needed to attain a given strength.

Assuming constant workability, the efficiency of the substitute material may be stated in terms of the ratio of the mass of BFS plus FA to the mass of PC which is substituted.

For equal workability and strength, the efficiency factor varies with blend proportions and the characteristic strength. In the present investigation, the efficiency factor diminished for all strength levels as the proportion of BFS increased from 25 to 75%. The maturity efficiency factor is given by the ratio of log (maturity) values for the cements being considered. In this case the mass ratio water/binder is constant. Maturity efficiency factors reduced with increase in BFS but did not vary with age.

Author Information

Mills, RH
University of Toronto, Toronto, Ont., Canada
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: C01
Pages: 89–105
DOI: 10.1520/STP36393S
ISBN-EB: 978-0-8031-4965-6
ISBN-13: 978-0-8031-0453-2