Feasible Use of Recycled Concrete Powder as a kind of Mineral Admixture

Title: Feasible Use of Recycled Concrete Powder as a kind of Mineral Admixture
Author(s): Xiaoyan LIU, Junqing ZUO, Kaiqiong LIU, Aihua LIU
Paper category : conference
Book title: 2nd International Conference on Waste Engineering and Management - ICWEM 2010
Editor(s): J.Zh. Xiao, Y. Zhang, M.S. Cheung and Reuben P. K. Chu
Print-ISBN: 978-2-35158-102-5
e-ISBN: 978-2-35158-103-2
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 722 - 728
Total Pages: 7
Nb references: 9
Language: English

Abstract: Reusing the waste concrete can not only resolve the problem of dealing with the garbage, but also realize saving the energy and reducing the pollution. In this paper, recycled concrete powder is obtained by crushing and grinding the waste concrete. Three different concrete mixes are studied and compared: normal concrete, concrete containing fly ash and ground granulated blast-furnace slag, concrete containing fly ash and recycled concrete powder.
Experimental results of strength test show that recycled concrete powder has a similar pozzolanic activity to ground granulated blast-furnace slag. The results of the slab test show that the recycled concrete powder can help to delay the initial cracking time, decrease the maximal cracking width and length, and decrease the total cracking area. The results of shrinkage test also show that concrete containing recycled concrete powder has the minimal shrinkage strain. So recycled concrete powder can help to improve the early anti-crack performance of concrete. All of these experimental results show that recycled concrete powder is feasible to be used as a kind of mineral admixture.

Online publication: 2011-01-25
Publication type : full_text
Public price (Euros): 0.00