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Cement and Concrete Research 35 (2005) 438 – 444

Waste fuels: their effect on Portland cement clinker
M.A. Trezzaa,*, A.N. Scianb a ´ ´ Facultad de Ingenierıa—UNCPBA. Universidad Nacional del Centro, Av. del Valle 5737 Olavarrıa, Buenos Aires B 4700 JWI Argentina b ´ ´ Centro de Tecnologıa de Recursos Minerales y Ceramica, CONICET, UNLP. Cno Centenario y 506 (1897)-Gonnet, Argentina Received 10 April 2003; accepted 27 May 2004

Abstract Nowadays, different kinds of industrial wastes are increasingly used in the clinkering process by the cement industry, with the aim of taking advantage of their energy content or confining unsuitable substances. This work evaluates the physicochemical characteristics of the clinkers obtained after incorporating three different wastes in different proportions: two of them with energetic capacity—trade marked waste fuel and waste carbon of petroleum—and the third that would be confined—pyrolitic carbon. The fusion temperature of the mixtures, the differential thermal analysis and the thermogravimetric analysis (DTA/TG) during clinkering and after hydration, the specific surface area at the same milling times, X-ray diffraction (XRD) and mechanical strength of the pastes elaborated with a water/cement 0.4 relation were analyzed. The results obtained were compared to those of the clinker obtained without additions. D 2004 Elsevier Ltd. All rights reserved.
Keywords: Portland cement; Clinker; Waste management; Hydration

1. Introduction Cement companies are introducing the industrial waste coprocessing from a perspective that combines environmental policies with the interests of companies. Industrial wastes with residual energy and low content of chlorides and heavy metals can be appropriated to provide part of the energy required to make Portland cement. These wastes can be used as alternative fuels for making Portland cement, as long as they fulfill the following requirements [1]: U The emissions released by the cement