Environmental Engineering Reference
In-Depth Information
Table 8. Mixture design parameters with responses
Run
Order
Jarosite
waste
(gm)
Clay
(gm)
PCCRs
(gm)
Comp.
Strength
(kg/cm
2
)
Water
Absor-
ption (%)
Shrin-
kage
(%)
Density
(g/cc)
10
395.00
278.75
326.25
36.03
17.27
15.72
1.55
5
275.00
500.00
225.00
20.87
18.63
12.75
1.64
13
275.00
275.00
450.00
19.28
18.87
8.18
1.52
3
800.00
110.00
90.00
115.62
11.23
44.37
1.94
9
657.50
218.75
123.75
85.40
14.51
29.96
1.76
4
500.00
500.00
0.00
53.36
18.26
12.26
1.74
2
275.00
275.00
450.00
20.38
17.26
7.83
1.56
11
800.00
110.00
90.00
113.28
11.48
42.13
1.91
14
500.00
500.00
0.00
57.30
18.16
11.96
1.69
1
440.00
110.00
450.00
8.15
15.89
13.13
1.45
6
515.00
282.50
202.50
60.02
16.10
22.07
1.63
12
275.00
500.00
225.00
20.87
18.43
12.75
1.68
8
650.00
350.00
0.00
88.19
17.26
12.55
1.77
7
620.00
110.00
270.00
33.16
13.91
26.70
1.67
3.2. Characteristics of Jarosite Waste Composite Bricks
3.2.1. Effect of Jarosite Clay Ratio and CCRs on Compressive Strength
of Bricks
S/S jarosite waste composite bricks are shown in Figure 8. S/S of jarosite
waste was done with other additives like CCRs and clay to provide structural
integrity with specific shape and size for easy transportation and economic
storage of the waste. Normally, s/s products, would not reach the specific
strength and other properties so as to enable its utility as a value added
products. In the present study, sintering was done to assess its suitability for
possible utility of the composites as a construction material. A correlation
between the compressive strength, water absorption capacity, shrinkage and
density of jarosite waste composite bricks was done and the effect of CCRs on
mechanical properties of jarosite waste composite bricks are shown in Figure 9
a,b,c,d. The results from the preliminary experiments revealed that the
compressive strength of the bricks made with 3:1 ratio of jarosite waste: clay
without CCRs was as high as 140.8 kg/ cm
2
. Increase in concentration of
CCRs, decreased the compressive strength, shrinkage, density and increased
the water absorption (Asokan, 2007). On the contrary, work carried out by
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