Civil Engineering Reference
In-Depth Information
1.0
0.9
0.8
Kou and Poon (2009)
Mukesh (2009)
Taha and Nounu (2008a)
Wang and Huang (2010b)
0.7
0.6
0
10
20
30
40
50
60
70
80
90
100
Recycled glass content (%)
11.4
Normalized compressive strength at 28 days of recycled glass
concrete with different recycled glass content.
compressive strength of recycled glass concrete shows a great improvement,
though the early compressive strengths for concrete with different content
of recycled glass content are not higher than that of the control group.
Concrete with glass powder
Being amorphous and containing relatively large quantities of silicon and
calcium, glass is, in theory, pozzolanic or even cementitious in nature when it
is finely ground. Moreover, the texture and shape properties of glass particle
can be improved as the size is further reduced; thus, their negative effects on
the strength decrease. Many investigations have confirmed that its pozzolanic
reactivity increases as its fineness increass. Besides, a high content of Na
2
O
in glass is easy to leach out as the size of glass particle is reduced, hence
influencing the strength of concrete, especially at early ages.
Based on observed compressive strength, the pozzolanic properties of glass
are first noticeable at particle sizes below approximately 300 mm (Federico
and Chidiac, 2009). Below 100 mm, glass can have a pozzolanic reactivity
which is greater than that of fly ash at a low percentage of cement content
and after 90 days of curing (Shi et al., 2005; Schwarz et al
.
, 2008). Meyer
et al. (1996) postulated that below 45 mm, glass may become pozzolanic.
