Utilization of recycled cathode ray tubes glass in cement mortar for X-ray radiation-shielding applications

Tung Chai Ling, Chi Sun Poon, Wai Shung Lam, Tai Po Chan, Karl Ka Lok Fung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

87 Citations (Scopus)


Recycled glass derived from cathode ray tubes (CRT) glass with a specific gravity of approximately 3.0g/cm3can be potentially suitable to be used as fine aggregate for preparing cement mortars for X-ray radiation-shielding applications. In this work, the effects of using crushed glass derived from crushed CRT funnel glass (both acid washed and unwashed) and crushed ordinary beverage container glass at different replacement levels (0%, 25%, 50%, 75% and 100% by volume) of sand on the mechanical properties (strength and density) and radiation-shielding performance of the cement-sand mortars were studied. The results show that all the prepared mortars had compressive strength values greater than 30MPa which are suitable for most building applications based on ASTM C 270. The density and shielding performance of the mortar prepared with ordinary crushed (lead-free) glass was similar to the control mortar. However, a significant enhancement of radiation-shielding was achieved when the CRT glasses were used due to the presence of lead in the glass. In addition, the radiation shielding contribution of CRT glasses was more pronounced when the mortar was subject to a higher level of X-ray energy.
Original languageEnglish
Pages (from-to)321-327
Number of pages7
JournalJournal of Hazardous Materials
Publication statusPublished - 15 Jan 2012


  • Cathode ray tubes
  • Cement mortar
  • Density
  • Glass recycling
  • Radiation-shielding
  • Strength

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis


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