Complete recycling of concrete without additional bonding material

2014 Fiscal Year Final Research Report

• Project/Area Number: 26630201
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Civil engineering materials/Construction/Construction management
• Research Institution: The University of Tokyo
• Principal Investigator: SAKAI Yuya 東京大学, 生産技術研究所, 助教 (40624531)
• Project Period (FY): 2014-04-01 – 2015-03-31
• Keywords: コンクリート / リサイクル / 再生 / 圧縮成形 / 炭酸化

Outline of Final Research Achievements

A novel methodology is proposed to achieve complete recycling of concrete waste without any additional binding material. The concrete waste was crushed, milled and compacted to get compacts. When the size of the milled concrete powder was around 100 micron and the compaction pressure was 200 MPa, the average strength of the obtained compacts was 10 MPa. The obtained results showed that as the powder is finer and the applied pressure is higher, the strength of the compacts increases. Carbonation treatment was adopted and the obtained compacts had compressive strength of 30 MPa. As seen above, the objective of this research is successfully reached.

Free Research Field

コンクリート工学