|Table of Contents|

Investigation on Low-strength Recycled Concrete and Its Application(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年02期
Page:
20-26
Research Field:
Publishing date:

Info

Title:
Investigation on Low-strength Recycled Concrete and Its Application
Author(s):
XIAO Jian-zhuang;  ZHANG Hang-hua;  TANG Chen-jun;  CHEN Xuan-yu;  DUAN Zhen-hua;  ZHANG Qing-tian
(College of Civil Engineering, Tongji University, Shanghai 200092, China)
Keywords:
waste concrete;  recycled aggregate;  recycled powder;  recycled foamed concrete;  engineered materials arresting system
PACS:
TU528
DOI:
10.19815/j.jace.2018.02009
Abstract:
A method of recycling construction and demolition waste was provided based on the analysis of previous investigations and experimental verifications. The recycled materials, including recycled aggregate(RA)and recycled powder(RP), could be used to produce a new kind of recycled foamed concrete. The processing technique and properties of RA and RP were introduced. Mechanical behaviors and application of recycled concrete(RC)and foamed concrete were assessed, especially the major influence factors on property of foamed concrete. Based on this, an effective combination of RC and foamed concrete was proposed. A kind of recycled foamed concrete with proposed mix proportion was produced and tested to confirm the mechanical behaviors. Finally, some further research was suggested. The possibility of recycling the engineered materials arresting system(EMAS)materials for second or even multiple times after destroyed was put forward, which made the applicability of this material more valuable. The results show that, with the same mixture, the strength and density of foamed concrete are much lower than those of RC. The strength and density of foamed concrete will be further reduced by totally replacing the sand with recycled fine aggregate. In addition, the recycled foamed concrete can meet the requirements of energy dissipation ability in the code Engineered Materials Arresting System(MH/T 5111—2015), which validates the feasibility to apply this kind of concrete in the EMAS at the runway end safety area(RESA).

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Last Update: 2020-04-21