Oil cracking waste catalyst as an active pozzolanic material for superplasticized mortars

Kung Chung Hsu*, Yun Sheng Tseng, Fan Feng Ku, Nan Su

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

45 引文 斯高帕斯(Scopus)

摘要

Superplasticized mortars containing waste catalyst (EPcat) have been characterized. This waste catalyst comes from catalytic crackers of oil companies. It consists mainly of silicon oxide and aluminum oxide, and shows some amorphous structure. Test results indicate that more superplasticizer or water is required for maintaining the workability of mortars incorporating EPcat. Nevertheless, mortars with EPcat exhibit greater compressive strength than those without. The strength improvement could be attributed to high pozzolanic activity of the waste catalyst. One evidence is that earlier temperature rise was observed in EPcat mortars during hydration than plain ones. Besides, the microstructure analysis indicates that both ettringite and monosulfoaluminate were produced in the early curing period of EPcat mortars. These confirm that EPcat could accelerate the cement hydration by inducing a pozzolanic reaction between the catalyst and calcium hydroxide, the cement hydrated product.

原文英語
頁(從 - 到)1815-1820
頁數6
期刊Cement and Concrete Research
31
發行號12
DOIs
出版狀態已發佈 - 2001 十二月

ASJC Scopus subject areas

  • 建築與營造
  • 材料科學(全部)

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