Improving ‘waste reduction’ and ‘recycling techniques’ is currently being advocated worldwide. For transforming our words into action, finding a remedy became imperative. Our intentions drifted our attention towards efficiency of water treatment, dissipation of wealth for partially recovering its potability and conserving the precious water resource for sustainable development. With the world advancing in concrete technology and growing scarcity of usable water, we are compelled to start with replacing the use of potable water in construction by ‘industrial waste water’. The feasibility of using industrial effluents as mixing water and the effect of its constituents on cement mortar properties were experimentally evaluated. Cement mortar specimens were cast using crude waste water and deionised water for comparison. This paper examines the effect of industrial waste water (from electroplating industry) on cement mortar properties like setting time, density and compressive strength. Using fairly conservative assumptions regarding the life of concrete prepared using water tainted with metallic ions, the rate of chemical deterioration and with a greater emphasis on cost effectiveness, it can be shown that this breakthrough most likely achieves overall positive social benefits.
Presentation on using industrial waste water in making of plain concrete @ intell by raghavendra
1. A
Paper
Presentation
EFFCECT OF METAL IONS IN WASTE
WATER ON CEMENT MORATAR
PROPERTIES
R.RAGHAVENDRA
K.SHIVA
III B.Tech, Civil
yours.raghu113@gmail.com
III B.Tech, Civil
shiva.kuncharapu@gmail.com
FROM
J.N.T.U College of Engg., Anantapur.
For
INTELL TECHNOLECT 2K11
2. INTRODUCTION
RESEARCH SIGNIFICANCE
MATERIALS
METHODS
RESULTS AND DISCUSSIONS
CONCLUSION
REFERENCES
9. SAND
Particle size a/c to the BIS specifications
washed with deionised water
Oven dried for 24 hours at 100±10ºC
cooled to a room temperature of 27±2ºC.
Sl.No.
Properties
Results
1.
Specific Gravity
2.63
2.
Bulk Density (Oven dry)
15.54 KN/m3
3.
Water Absorption
1.2%
4.
Fineness Modulus before sieving
2.72
5.
Particle size variation
0.15 to 2.0mm
6.
Loss of weight with Conc. HCl
0.124%
Properties of sand
10. WATER
Deionised water (DW)
Treated wastewater (TW)
Impurity
DW
Standard
TW
pH
7.3
6-9
7.7
TSS
---
100
1600
TDS
15
---
1884
---
10
Alkalinity
10
Acidity
2.0
---
0
Hardness
2.5
---
2.8
Sulphates
0.2
---
8.2
Chlorides
3.0
1.0
10
Nitrogen
---
50
15
Characteristics of water
(All values in mg/L, except pH)
11. Methods
1) Test for Setting time
27 ± 2
Relative Humidity
2) Test for Density
3) Test for Compressive strength
Temp
90 %
12. RESULTS AND DISCUSSIONS
a) SETTING TIME (30min)
Setting time (minutes)
Effect of M ixing W ater on Setting
Time
350
300
250
200
INITIAL
150
FINAL
100
50
0
DW
TW
Type of mixing water
Effect of different types of mixing water on setting time of concrete
13. RESULTS AND DISCUSSIONS
b) DENSITY
DENSITY VARIATION FOR DAY 7
2650
DENSITY OBTAINED
2600
2550
2500
SW
TW
2450
2400
2350
2300
1
2
NUMBER OF SAMPLES TESTED
3
14. RESULTS AND DISCUSSIONS
b) DENSITY
VARIATION OF DENSITY
ON DAY 90
VARIATION OF DENSITY ON DAY 28
2560
2600
2550
2580
2560
SW
TW
2530
2520
DENSITY
DENSITY
2540
SW
2540
TW
2520
2500
2510
2480
2500
2460
SAMPLES
SAMPLES
16.
To conclude, the type of mixing water did not affect the
density of the cement mortar cubes. However, it did affect
the initial and final setting time. When treated industrial
wastewater was used as the mixing water, the setting times
had significantly retarded. Long-term development of
compressive strength was not affected.
17. REFERENCES
*
USE OF MUNICIPAL WASTEWATER FOR PLAIN
CEMENT CONCRETE CONSTRUCTIONS
Electronic Journal of Environmental, Agricultural and Food Chemistry
*
EFFECT OF METAL IONS IN INDUSTRIAL
WASTEWATER ON CEMENT SETTING, STRENGTH
DEVELOPMENT AND HARDENING
The Indian Concrete Journal
*
INDUSTRIAL EFFLUENTS ORIGIN
CHARACTERISTICS , EFFECTS , ANALYSIS AND
TREATMENT
Manivasagam.N, Sakthi Publications, Coimbatore