• Title/Summary/Keyword: 순환유동층보일러애쉬

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Development of Autoclave Aerated Concrete Using Circulating Fluidized Bed Combustion Ash (순환유동층 보일러애쉬를 활용한 경량기포 콘크리트 개발)

  • Lee, Chang Joon;Song, Jeong-Hyun;Chung, Chul-Woo
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.9 no.1
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    • pp.58-65
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    • 2021
  • In this study, as a method to increase the recycling of circulating fluidized bed combustion ash(CFBCA), CFBCA was utilized to produce autoclave aerated concrete product since CFBCA contains quicklime and calcium sulfate components that are required for the manufacture of autoclave aerated concrete. Successful achievement of such objective will bring cost reduction with high value addition, saving of natural resources, and the reduction of environmental load. Various mixing designs were designed to evaluate the properties of autoclave aerated concrete made of CFBCA. Based on series of experimental program, prototypes mix design for factory manufacturing was obtained. According to the experimental results, it was confirmed that gypsum can be replaced with CFBCA through the method of pre-treating the CFBCA as a slurry. It was possible to produce competitive autoclave aerated concrete products using CFBCA.

Evaluation of Anti-Stripping Performance in Asphalt Concrete using Byproduct Ash produced from Circulating Fluidized Bed Boiler (보일러 부산 애쉬를 이용한 아스팔트 콘크리트의 박리저항성 평가)

  • Kim, Yooseok;Kim, Nakseok
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.38 no.2
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    • pp.319-325
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    • 2018
  • Pot-holes are steadily increasing due to abnormal climate such as heavy rainfall and frequent snowfall. Pot-hole related to traffic accidents cause injuries, car damage and distress of road facilities. To reduce pot-holes, the use of an anti-stripping agent is mandatorily recommended to asphalt concrete mixture. Hydrated lime is commonly used as anti-stripping agent due to the convenience and economics. Byproduct ash from circulating fluidized bed boiler was reviewed as an anti stripping agent. According to the test results, the byproduct ash is satisfied with TSR specification using 1% to 3% by weight of the asphalt mixture. The byproduct ash was examined under various condition changes of aggregate and asphalt concrete mixture considering quality movement. According to the results, using the byproduct ash was measured average 0.87 of TSR and coverage rates of 60% after rolling bottle test. Test results also revealed that the byproduct ash showed stable performance. Using the byproduct ash to decrease pot-hole in asphalt concrete pavement is suitable for demonstrating stable performance as anti-stripping agent.