High-strength structural concrete with recycled aggregates

Ngo, Nelson, Shing Chai (2004) High-strength structural concrete with recycled aggregates. [USQ Project]


Download (3MB)


Recycled aggregates are comprised of crushed, graded inorganic particles processed from
the materials that have been used in the constructions and demolition debris. The aim for
this ongoing project is to determine the strength characteristic of recycled aggregates
for application in high strength structural concrete, which will give a better understanding
on the properties of concrete with recycled aggregates, as an alternative material to coarse
aggregate in structural concrete. The scope of this project is to determine and compare the
high strength concrete by using different percentage of recycled aggregates.
The investigation was carried out using workability test, compressive test, indirect tensile
test and modulus of elasticity test. There were total of eight batches of concrete mixes,
consists of every 20% increment of recycled aggregate replacement from 0% to 100%.
Moreover, 100% of recycled aggregate mix batches included fly ash, water/cement ratio
of 0.36 and 0.43. The workability of concrete considerably reduced as the amount of
recycled aggregate increased. This was evaluated through standard slump test and
compacting factor test. For strength characteristics, the results showed that a gradually
decreasing in compressive strength, tensile strength and modulus of elasticity as the
percentage of recycled aggregate used in the specimens increased.

Statistics for USQ ePrint 21
Statistics for this ePrint Item
Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering (Up to 30 Jun 2013)
Date Deposited: 11 Oct 2007 00:12
Last Modified: 02 Jul 2013 22:30
Uncontrolled Keywords: high strength structural concrete, recycled aggregates
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400510 Structural engineering
URI: https://sear.unisq.edu.au/id/eprint/21

Actions (login required)

View Item Archive Repository Staff Only