Research Study in a nutshell
USE OF Waste Glass Powder in Concrete as cement replacement
?
Waste glass powder as cement replacement upto 40% (by 5%).
?
With 20% replacement – produces best strong & sulphate resistant source.
?
In every site, a lot of broken glass pieces 5% of solid waste glass containers, window glass,
windscreens, bottles, tube lights bulbs and electronic equipment – disposal is a problem.
?
Concrete in marine structures– deterioration due to sulphate attack due to water penetration &
sulphete salt concentration.
?
To reduce energy consumption & co2 emission from construction processes.
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Finely divided glass powder as a partial replacement of cement; waste glass – sio2 72.5% - finest
powder (0.02311) – sio2 reacts with alkalis in cement (pozzolanic reaction) to form cementitious
product with higher strength and durability, besides reduces the sulphate attack in concrete .
?
OPC 43 cement – sand with sp.gty 2.62; broken stone (Coarse aggregate) sp.gty 2.93…20mm
down size water with pH value 6.50 – superplasticizer also used as admixture concrete mix for
M20…. 1:2.35:4.47 with w/c ratio of 0.45.
Test Results :
i) 20% replacement ? ? 27.05N/mm2 / 33.50 N/mm2 (+ 24%) increase in compressive strength.
ii) Sulphate attack ------ 25.45N /mm2 / 31.85 N/ mm2 (+25%) increase in strength.
iii) Surphate attach reduction -------- 370.40 mg/ lit / 82.31 mg/lit (-77.77%).
Ref : The Indian Concrete Journal... July 2013
Table : Enhanced Properties of Concrete mixed with Waste glass Power
Mix
GP%
Compressive Strength
Compressive Strength
(28 days) MPa (%)
Subjected to sulphate
Attack (28 days) (%)
(SO4) (mg/lit)
Sulphate
in
content(SO4)
concrete
with
suplate attack
Reference
00
27.05
-
20.62
-
370.40
-
GP - 5
05
28.58
+6
21.83
+6
205.78
-44.44
GP - 10
10
29.77
+10
22.57
+9
164.62
-55.55
GP - 15
15
31.56
+17
24.36
+18
102.89
-72.22
GP – 20
20
33.50
+24
26.75
+30
82.31
-77.77
GP – 25
25
30.52
+13
23.00
+12
246.93
-33.33
GP – 30
30
24.22
-10
17.09
-17
308.67
-16.66
GP - 35
35
22.44
-17
15.71
-24
339.53
-8.33
GP - 40
40
19.03
-30
12.67
-39
360.11
-2.77
- Ref: The Indian Concrete Journal July 2013
fl;Lkhdg; nghwpahsh;
27
mf;Nlhgh; 2013
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