2012 Fiscal Year Final Research Report
Development of a new recycling process of the aggregate recovered from waste concrete
| Project/Area Number |
23656484
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Properties in chemical engineering process/Transfer operation/Unit operation
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| Research Institution | Yamagata University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2012
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| Keywords | 粉粒体操作 / リサイクル / 骨材 / 廃コンクリート / 酸溶液 / 劣化反応 / 撹拌ミル |
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| Research Abstract |
A new recycling process of the aggregate from waste concrete was suggested by using the chemical degradation of concrete and the grinding operation. After the waste concrete was immersed into some acid solutions and then was ground autogenously by a stirred-mill, the recovery ratio of the aggregate was investigated. The results were revealed that the recovery ratio increased effectively with the acid immersion, and especially was attained to about 70% in the case of a nitric acid immersion. The aggregate recovered was also confirmed to be high quality aggregate without usage restrictions.
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