Development of a CO2-solidification method for recycling concrete wastes

Toshiyuki Hashida, S. Teramura, J. C. Ha, H. Takahashi

Research output: Contribution to conferencePaperpeer-review

2 Citations (Scopus)


A new method for solidifying concrete wastes is proposed which utilizes a CO2-activated hardening process in this study. The CO2-solidification method has been applied to consolidate milling dust of Autoclaved Lightweight Concrete (ALC). It has been shown that the CO2-method allows pressure-moulded compacts of the ALC milling dust to be hardened at 20-100°C within 24 hr. The CO2-treated compact is shown to give relatively high bending strength, 12 MPa and to have good moisture control performance. Furthermore, polymeric short-fibers have been incorporated into the compact in order to overcome the brittleness of the CO2-treated material. The advantage of introducing multiple-cracking with short-fiber reinforcement is discussed in order to improve the strength and toughness of the CO2-treated concrete waste.

Original languageEnglish
Number of pages10
Publication statusPublished - 1996 Dec 1
EventProceedings of the 1996 4th Materials Engineering Conference. Part 1 (of 2) - Washington, DC, USA
Duration: 1996 Nov 101996 Nov 14


OtherProceedings of the 1996 4th Materials Engineering Conference. Part 1 (of 2)
CityWashington, DC, USA

ASJC Scopus subject areas

  • Building and Construction


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