Effects of Blends of Cement Kiln Dust and Fly Ash on Properties of Concrete

Report No: 96-R1

Published in 1995

About the report:

This study evaluated concretes containing cement kiln dust (CKD) and fly ash to determine whether satisfactory properties can be achieved for long-lasting performance in the field. The results indicate that certain combinations of cement, CKD, and fly ash may provide concretes with acceptable performance. A determination of acceptable combinations will require extensive study which was beyond the scope of this project. Excessive expansions occurred when CKD blends were used in mortars subjected to cyclic wetting and drying at a temperature of 80°C (176°F). The addition of CKD to fly ash concrete did not improve strength development but did reduce the coulomb values (AASHTO T 277or ASTM C 1202) at early ages, indicating reduced chloride permeability. However, at later ages fly ash concretes containing cement with an alkali content of 0.70% or above had very low coulomb values indicating high resistance to chloride penetration irrespective of the alkali activation.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Last updated: December 17, 2023

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