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Materials and Structures

, Volume 35, Issue 8, pp 510–515 | Cite as

Use of recycled glass as a raw material in the manufacture of Portland cement

  • Z. Xie
  • Y. Xi
List of Papers

Abstract

Scrap glass is a solid waste from daily recycling. Most of the waste glass is sodium-lime-silicate glass which has, more or less, similar chemical compositions to clay, a raw material in cement manufacturing. Therefore, we utilize the solid waste in cement raw mix by replacing part of the clayey component. In this study, the effects of the glass in cement raw mix on clinker burning were investigated. The experimental results show that the addition of the glass into cement raw mix (1) results in the formation of more liquid phase between 950°C to 1250°C compared with conventional raw meals; (2) decreases C3S content in the clinker; and (3) increases NC8A3 content, which leads to flash setting and poor strength development of the cement. Therefore, it is necessary to increase the SG value [SG=SO3•100%/(1.292 K2O+0.85 Na2O)] of the clinker when the glass is present in the raw mix.

Keywords

Portland Cement Cement Clinker Waste Glass Similar Chemical Composition Free Lime 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

Le verre est l'un des grands déchets de la vie quotidienne. Une analyse des déchets de verre révèle que ceux-ci sont constitués essentiellement de silicate de soude et de calcium. Dans nos essais, des déchets de verre sont mélangés à la pâte de ciment en se substituant à sa composante argileuse, et l'effet de leur présence dans le ciment sur le brûlage dans le clinker a été examiné. Les essais montrent que l'adjonction de verre dans la pâte de ciment stimule la formation de la phase liquide entre 950°C et 1 250°C par comparaison avec à sa forme habituelle, diminue le taux de C3S dans le clinker et augmente celui de NC8A3 qui engendre une prise rapide et un faible développement de la résistance mécanique du ciment. Il faudrait augmenter de façon appropriée le SG/SG=SO3•100%/(1,292 K2O+0,85 Na2O)] du clinker en présence de verre.

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Copyright information

© RILEM 2002

Authors and Affiliations

  • Z. Xie
    • 1
  • Y. Xi
    • 1
  1. 1.Department of Civil, Environmental and Architectural EngineeringUniversity of Colorado at BoulderUSA

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