Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24515
Title: The cause and influence of self-cementing properties of fine recycled concrete aggregates on the properties of unbound sub-base
Authors: Poon, CS 
Qiao, XC
Chan, D
Issue Date: 2006
Publisher: Pergamon Press
Source: Waste management, 2006, v. 26, no. 10, p. 1166-1172 How to cite?
Journal: Waste management 
Abstract: The use of coarse recycled concrete aggregates (CRCA) in conjunction with fine recycled concrete aggregates (FRCA) as sub-base materials has been widely studied. Although research results indicate that it is feasible to employ both CRCA and FRCA as granular sub-base, the influence of the unhydrated cement in the adhered mortar of the RCA on the properties of the sub-base materials has not been thoroughly studied. Generally, it is known that the strength of the sub-base materials prepared with RCA increases over time. However, this mechanism, known as the self-cementing properties, is not well understood and is believed to be governed by the properties of the fine portion of the RCA (<5 mm). This paper presents an investigation on the cause of the self-cementing properties by measuring X-ray diffraction patterns, pH values, compressive strength and permeability of various size fractions of the FRCA obtained from a commercially operated construction and demolition waste recycling plant. Their influence on the overall sub-base materials was determined. The results indicate that the size fractions of <0.15 and 0.3-0.6 mm (active fractions) were most likely to be the principal cause of the self-cementing properties of the FRCA. However, the effects on the properties of the overall RCA sub-base materials were minimal if the total quantity of the active fractions was limited to a threshold by weight of the total fine aggregate.
URI: http://hdl.handle.net/10397/24515
ISSN: 0956-053X
DOI: 10.1016/j.wasman.2005.12.013
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

49
Last Week
0
Last month
2
Citations as of Sep 19, 2017

WEB OF SCIENCETM
Citations

41
Last Week
0
Last month
1
Citations as of Sep 17, 2017

Page view(s)

58
Last Week
1
Last month
Checked on Sep 17, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.