Development of a new recycling process of the aggregate recovered from waste concrete

开发废混凝土骨料回收新工艺

• 批准号: 23656484
• 负责人: HASEGAWA Masahiro
• 金额: $ 2.5万
• 依托单位: Yamagata University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23656484/
• 关键词: 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; コンクリート; 骨材分離; 粉砕操作; 分離度

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.

提出了一种利用混凝土的化学降解和粉磨作用回收废弃混凝土骨料的新工艺。将废弃混凝土浸泡在酸性溶液中，然后用搅拌磨进行自磨，研究了骨料的回收率。结果表明，酸浸能有效地提高回收率，尤其是硝酸浸，回收率可达70%左右。回收的骨料也被证实是没有使用限制的高质量骨料。

项目成果

酸浸漬による廃コンクリートからの粗骨材の回収

酸浸法回收废弃混凝土中的粗骨料

• 发表时间: 2012
• 作者: 黒川恵史;中塚憲章;安田秀幸;吉矢真人;柳楽知也;渡部剛士・小竹直哉・木俣光正・長谷川政裕
• 通讯作者: 渡部剛士・小竹直哉・木俣光正・長谷川政裕