Kinetic Consideration of Clinker Formation in Portland Cement Production Using Demolition Rubbles (Concrete,mortar and plaster) Part I : Burning Ability of Raw Mixes

https://doi.org/10.22146/ajche.50186

Sumardi P(1*), I. B. Agra(2), I. M. Bendiyasa(3), Wahyudi B. S.(4)

(1) Chemical Engineering Department Faculty of Engineering Gadjah Mada University Jln. Grafika, No.2, Jogjakarta INDONESIA
(2) 
(3) 
(4) 
(*) Corresponding Author

Abstract


Wahyudi B.S.Wahyudi B.S.In general, the main raw materials in Portland cement production are limestone, clay, and corrective materials such as iron sand and silica sand. These raw material come from natural deposits, which are very hard to find in some countries. In this research, Portland cement was made by utilizing the demolition rubble of office and housing buildings. The rubble consists of concrete wastes (mixtures of hydrated Portland cement minerals and some aggregates) and some building bricks as well as mortar/plaster of Portland cement. To meet the cement modulus, which is generally used in Portland cement industries, corrective materials such as limestone (source of CaO) and disposed building bricks are used. The term burning ability is used for Portland cement to measure the CaO free content in the cement clinker produced from specified raw material mixes at a specific operating 'condition of clinkering. The cement modulus used is Ume Saturation Factor (LSF) and Silica Modulus (SM). The minimum Cao free content was found by using LSF: 0.86, SM: 2.14, and clinkering temperature 14000C for 30 minutes. The cement modulus was made from concrete waste, limestone, and disposed red brick with a weight ratio of 1: 3.489: 0.677. Keywords: Burning ability,demolition rubble of buildings, Portland cement, and raw mixes.

Keywords


Burning ability, demolition rubble of buildings, Portland cement, and raw mixes.

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References

  1. Ahluwalia,S.C., Goswaani, R. K., and Harsh, S. (1997), "Modeling the kinetics of clinkerization," Clinker and Cement Production, Proceedings of the 10th International Congress on Chemistry of cement, Plenary Lectures, vol. 1, Gothenburg, Sweden. 
  2. Christensen, N. H. (1979). "Burning ability of cement raw mixes at 1400°C: The effect of fineness," An International Journal, Cement and Concrete Research, 9, 2, 285-294, Pergamon Press, New York. 
  3. Duda, W. H. (1985). Cement data book, International process engineering in the cement industry, 2nd ed., completely revised and enlarged new ed., Bauverlag Gmbh-Wiesbaden
  4. Ghosh, S. N. (1983). Advances in cement technology, Cement Research Institute of India, Pergamon Press, New York. 39– 177. 
  5. Sumardi, P. (1999). Heat treatment on hydrated cement, Ceramic Technology Laboratory, Chemical Engineering Department, Engineering Faculty, Gadjah Mada University.



DOI: https://doi.org/10.22146/ajche.50186

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