presentation on using industrial waste water in making of plain concrete @ intell by raghavendra
DESCRIPTION
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.TRANSCRIPT
APaper Presentation
R.RAGHAVENDRA K.SHIVA III B.Tech, Civil III B.Tech, Civil [email protected] [email protected]
FROMJ.N.T.U College of Engg., Anantapur.
EFFCECT OF METAL IONS IN WASTE WATER ON CEMENT MORATAR PROPERTIES
For
INTELL TECHNOLECT 2K11
INTRODUCTIONINTRODUCTION
RESEARCH SIGNIFICANCERESEARCH SIGNIFICANCE
MATERIALSMATERIALS
METHODSMETHODS
RESULTS AND DISCUSSIONSRESULTS AND DISCUSSIONS
CONCLUSIONCONCLUSION
REFERENCESREFERENCES
INTRODUCTION
CONCRETE
Water
Potable
Non Potable ?...
S.No. Parameters Permissible limits
1 pH > 6
2 Chlorides as Cl-
(for normal concrete work)
< 200mg/L
3 Chlorides as Cl-
(for reinforced concrete work)
< 500mg/L
4 Phenolphthalein alkalinity < 50mg/L
5 Total alkalinity < 250mg/L
6 Total fixed (inorganic) solids < 3000mg/L
7 Total volatile (organic) solids < 200mg/L
8 Sulphate as SO42- < 400mg/L
9 Suspended matter < 2000mg/L Permissible limits prescribed by IS 456-2000
IS 456 -2000
ACI, ASTM
Tay and Yip
Ramana Reddy
Cebeci and Saatci
MATERIALSMATERIALS
CEMENTCEMENT
SANDSAND
WATERWATER
CEMENT Ordinary portland cement
S.No. Properties Results
1. Specific Gravity 3.1
2. Fineness 220m2/kg
3. Initial Setting Time 112 minutes
4. Final Setting Time 190 minutes
5. Soundness 0.5mm
6. Compressive Strength (in N/mm2)
3 days 23.5
7 days 34.2
28 days 44.5
90 days 46.5
Physical properties of cement
S.No. Oxide composition Percentage
1. CaO 65.49
2. SiO221.67
3. Al2O35.97
4. Fe2O33.85
5. SO31.66
6. MgO 0.78
7. K2O 0.46
8. Na2O 0.12
Chemical composition of cement
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
WATER
Impurity DW Standard TW
pH 7.3 6-9 7.7
TSS --- 100 1600
TDS 15 --- 1884
Alkalinity 10 --- 10
Acidity 2.0 --- 0
Hardness 2.5 --- 2.8
Sulphates 0.2 --- 8.2
Chlorides 3.0 1.0 10
Nitrogen --- 50 15
Deionised water (DW)
Treated wastewater (TW)
Characteristics of water (All values in mg/L, except pH)
Methods
1) Test for Setting time Temp
27 ± 2 90 %
Relative Humidity
2) Test for Density
3) Test for Compressive strength
RESULTS AND DISCUSSIONS a) SETTING TIME (30min)
Effect of Mixing Water on Setting Time
0
50
100
150
200
250
300
350
DW TW
Type of mixing water
Sett
ing t
ime (m
inute
s)
INITIAL
FINAL
Effect of different types of mixing water on setting time of concrete
RESULTS AND DISCUSSIONS b) DENSITY
DENSITY VARIATION FOR DAY 7
2300
2350
2400
2450
2500
2550
2600
2650
1 2 3
NUMBER OF SAMPLES TESTED
DE
NS
ITY
O
BT
AIN
ED
SW
TW
RESULTS AND DISCUSSIONS b) DENSITY
2460
2480
2500
2520
2540
2560
2580
2600
SAMPLES
DE
NS
ITY SW
TW
VARIATION OF DENSITY ON DAY 90
2500
2510
2520
2530
2540
2550
2560
SAMPLES
DE
NS
ITY SW
TW
VARIATION OF DENSITY ON DAY 28
RESULTS AND DISCUSSIONS c) COMPRESSIVE STRENGTH (25%)
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.
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
RAGHAVENDRA & SHIVA
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