Journal of the Japanese Society for Experimental Mechanics
Print ISSN : 1346-4930
ISSN-L : 1346-4930
Recycling of Waste Concrete and Fixation of Carbon Dioxide by Micro Bubble Jet Flow
Toshihiko SHAKOUCHIJyunichi TAKAMURAKoichi TSUJIMOTOToshitake ANDO
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2011 Volume 11 Issue Special_Issue Pages s59-s65

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Abstract

The severe problem of the disposal of various wastes continue to increase, one of which is waste concrete. In relation to global warming, reducing the generation and fixation of CO2 gas must also be solved. This paper experimentally examines an efficient recycling system to reuse the sand in waste concrete whose mean size is about 0.3mm. We found that the liquation of Ca2+ with waste concrete in a hydrochloric acid water solution of pH≈2.5 is optimum. Next, we show a new efficient CO2 gas fixation method by the reaction of carbonic acid with a micro bubble CO2 gas jet flow. Finally, a new process system to efficiently recycle waste concrete and to improve CO2 fixation and its performance is examined.

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© 2011 The Japanese Society for Experimental Mechanics
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