Use of Cement Bypass Dust as Filler in Asphalt Concrete Mixtures
Publication: Journal of Materials in Civil Engineering
Volume 14, Issue 4
Abstract
Cement bypass dust (CBPD) or cement kiln dust is a by-product of the manufacture of portland cement. It is generated during the calcining process in the kiln. Lime (CaO) constitutes more than 60% of CBPD composition. Other compounds include etc. Oman Cement Company generates about 25,000–30,000 t of CBPD every year. Some CBPD is recycled back again with the clinker. However, most of the material is disposed of on-site without any further reuse or reclamation. As such, research was carried out to investigate potential reuses of CBPD in the Sultanate of Oman. This paper will present the results of a study that investigated the use of CBPD as a filler in asphalt paving mixtures. Initially, the effect of adding either lime or CBPD (0, 3, 5, 7, 10, and 15%) on binder properties (penetration, ductility, and softening point) was investigated. Then three different asphalt concrete mixtures were prepared using lime (control), and 5 and 13% CBPD substitution for lime or fine aggregate. The mixtures were subjected to Marshall testing. Results indicate that the substitution of 5% CBPD for lime will essentially produce the same optimum asphalt binder content as the control mixture (4.5%, by weight of aggregate) without any negative effect on asphalt concrete properties (stability, flow, voids in total mix, voids in mineral aggregate, and voids filled with asphalt). However, the use of 13% CBPD for lime and fine aggregate will require a higher optimum asphalt binder content of 5.7%, by weight of aggregate. This will produce an uneconomical mix. Thus, 5% CBPD substitution for lime or cement would be the optimum used in asphalt paving mixtures.
Get full access to this article
View all available purchase options and get full access to this article.
References
Al-Baluchi, H. (1999). “The use of cement bypass dust in Portland cement concrete. Phase I.” Final Year Project Rep., Dept. of Civil Engineering, Sultan Qaboos Univ., Al-Khoud, Sultanate of Oman.
Al-Mamari, W. (1999). “The use of cement bypass dust in portland cement concrete. Phase II.” Final Year Project Rep., Dept. of Civil Engineering, Sultan Qaboos Univ., Al-Khoud, Sultanate of Oman.
Collins, R. J., and Emery, J. J. (1982). “Kiln dust–fly ash systems for highway bases and subbases.” Rep. FHWA/RD-82/167, Federal Highway Administration, Washington, D.C.
Dollhopf. D. J., and Juntunen, R. L. (1995). “Suitability of cement kiln dust for neutralization of acidic soils.” Final Rep., Holnam Inc., Dundee, Mich.
Emery, J. J., Mackay, M. H., Umar, P. A., Vanderveer, D. G., and Pichette, R. J. (1992). “Use of wastes and byproducts as pavement construction materials.” Proc., 45th Canadian Geotechnical Conf., Toronto.
Emery, J. J. (1980). “Stabilizing industrial sludge for fill applications.”Proc., 7th Int. Congress on the Chemistry of Cement, CEREC, Paris, 644-648.
Kraszowski, L., and Emery, J. J. (1981). “Use of cement kiln dust as a filler in asphalt mixes.” Proc., OFR/CANMET Symposium on Mineral Fillers, Ontario Research Foundation, Toronto.
Lin, C., and Zhang, X. (1992). “Use of cement kiln dust, fly ash, and recycling technique in low-volume road rehabilitation.” Transp. Res. Rec. 1345, Transportation Research Board, Washington, D.C., 19–27.
Morgan, S., and Halff, A. H.(1984). “Oily sludge solidification using cement kiln dust.” J. Environ. Eng., 110(5), 935–948.
Ministry of Transportation and Housing. (1994). “Section 400.” General Specification for Roads, Sultanate of Oman, 30-45.
National Asphalt Pavement Association (NAPA) (1982). “Mix design techniques. Part I.” National Asphalt Pavement Association, Instructors Manual, Lanham, Md.
Information & Authors
Information
Published In
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Aug 29, 2000
Accepted: May 2, 2001
Published online: Jul 15, 2002
Published in print: Aug 2002
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.