The Application of Recycled Aggregates in Self-Consolidating Concrete

Title: The Application of Recycled Aggregates in Self-Consolidating Concrete
Author(s): T. Tu
Paper category : conference
Book title: SCC'2005-China: 1st International Symposium on Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Zhiwu Yu, Caijun Shi, Kamal Henri Khayat and Youjun Xie
Print-ISBN: 2-912143-61-6
e-ISBN: 2912143624
Publisher: RILEM Publications SARL
Publication year: 2005
Pages: 145 - 152
Total Pages: 8
Nb references: 12
Language: English

Abstract: The utilization of recycled aggregates can reduce the over-development of the environment and slow the huge consumption of natural resources for concrete use. However, recycled aggregates are not suitable in the production of Self-Consolidating Concrete (SCC) due to their relatively high absorption capacity, unstable properties and the weaker strength of the recycled aggregates. Such dilemma can be overcome through carefully examining the characteristics of recycled aggregates and then adopting proper mixture proportions. In this paper, recycled aggregates generated from demolished construction wastes were examined and the Densified Mixture Design Algorithm (DMDA) was applied for batching SCC. Results show that most DMDA applied SCC specimens can have a slump of more than 180mm and a slump flow larger than 550mm during the initial stage. As a result of the high amount of recycled aggregates and cement added into the mixture, several DMDA specimens were not high-flowing and self-consolidating after 1 hour had lapsed. As to durability, both concrete resistivity and chloride ion penetration of DMDA specimens were all much better than those of traditional concrete at the age of 91 days.

Online publication: 2005-04-11
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143624.014