Glass recycling in cement production-an innovative approach

Guohua Chen, Harry Lee, King Lun Young, Po Lock Yue, Adolf Wong, Thomas Tao, Ka Keung Choi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

129 Citations (Scopus)


An innovative approach of using waste glass in cement production was proposed and tested in a laboratory and cement production plant. The laboratory characterization of 32 types of glass show that the chemical composition of glass does not vary significantly with its color or origin but depends on its application. The alkali content of glass, a major concern for cement production varies from 0 to 22%. For the glass bottles mainly found in Hong Kong waste glasses, the alkali content (Na2O) ranges from 10 to 19% with an average around 15%. There is no significant change of the SO2content in the gas exhaust of the rotary kiln when about 1.8 t/h of glass bottles were loaded along with the 280-290 t/h raw materials. The content of NOx, mainly depends on the temperature of the kiln, does not show significant change either. The SO3content of the clinker is comparable with that obtained without the loading of glass. The alkaline content shows a slight increase but still within three times the standard deviation obtained from the statistical data of the past year. The detailed analysis of the quality of the cement product shows that there is not any significant impact of glass for the feeding rate tested.
Original languageEnglish
Pages (from-to)747-753
Number of pages7
JournalWaste Management
Issue number7
Publication statusPublished - 1 Nov 2002
Externally publishedYes


  • Alkali
  • Nitrogen oxides
  • Rotary kiln
  • Solid waste
  • Sulfur oxides

ASJC Scopus subject areas

  • Waste Management and Disposal


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