Environment Friendly Cement
“Environment Friendly Cement” or “Eco Friendly Cement”
may be a new term these days victimization
principally within the housing industry.
we have a tendency to all apprehend that during a construction web
site, the foremost used material
is cement. several of us(specially
the civil engineers & the manufacturer) fathom the producing
of cement and constituents of cement. Before knowing regarding the “Eco Cement” we
must always regarding “Cement”
and it’s constituents.
1.a.Cement is a binding material used in engineering construction. It is
manufactured from calcareous substance(compounds of calcium and magnesium).
There are two classes of cement: Natural cement
& Artificial
cement). Nowadays we use Artificial Cement
or Portland
Cement. Raw materials used for manufacturing of Portland cement
are: calcareous
material( compounds of calcium and magnesium), argillaceous
materials(mainly silica,
alumina and oxides of iron).
Constituents of Portland Cement:
Mineral
Constituents of Portland Cement
Constituents
|
Oxide Composition
|
Abbreviated designation
|
Percentage
|
Tricalcium silicate
|
3CaO.SiO2
|
C3S
|
45 to 55
|
Dicalcium silicate
|
2CaO.SiO2
|
C2S
|
20 to 30
|
Tricalcium aluminate
|
3CaO.Al2O3
|
C3A
|
9 to 13
|
Tetracalcium
aluminoferrite
|
4CaO.Al2O3.Fe2O3
|
C4AF
|
8 to 20
|
Calcium Sulphate
|
CaSo4
|
2 to 6
|
|
Other Compounds
|
-
|
-
|
2 to 8
|
Acid
& Alkaline Constituents of Portland Cement
Constituents
|
Composition
|
Percentage
|
Calcium Oxide
|
CaO
|
60 to 67
|
Magnesium Oxide
|
MgO
|
0.1 to 4.0
|
Silica
|
SiO2
|
17 to 25
|
Alumina
|
Al2O3
|
3 to 8
|
Iron Oxide
|
fe2O3
|
0.5 to 6
|
Sulphur Trioxide
|
SO3
|
1 to 3
|
Potassium Oxide
|
K2O
|
0.3 to 1
|
Sodium Oxide
|
Na2O
|
0.4 to 1.3
|
Loss on Ignition
|
1.8 to 2
|
|
Insoluble Residue
|
0.3 to 0.5
|
Adverse result of Cement producing on Environment:
- Cement manufacture causes environmental impacts in the slightest degree stages of the method. These embrace emissions of mobile pollution within the sort of dirt, gases, noise and vibration once operative machinery and through blasting in quarries, and harm to country from production.
- Cement producing releases carbon dioxide within the atmosphere each directly once carbonate is heated, manufacturing lime and greenhouse emission, and additionally indirectly through the employment of energy if its production involves the emission of carbon dioxide.
1.b.Eco Cement
Methodology in Manufacturing the Eco Cement:
- Magnesite (a compound of magnesium) is obtained from quires and then it heated in a kiln to around 600 to 750 degrees C. The lower terminating temperature of the Tec-Kiln makes it simpler to utilize free vitality, for example, wind or sun oriented or even squander vitality and Tec Eco plan to make an oven that does not utilize non-renewable energy sources and in which the CO2 gases delivered from the magnesium carbonate as it disintegrates is caught and contained for further use or safe transfer.
- Eco cement also wants to grind in the hot area of his kiln for increased efficiency.
- The heating process produces reactive magnesia.
- The reactive magnesia (powder) is added in ordinary Portland cement.
- The resulting blended powder is eco Cement.
For what reason Should We Use Eco Cement/Environment Friendly Cement Over The Portland Cement:
- Normal Portland bond requires a furnace temperature of around 1450 °C. The receptive magnesia in Eco-Cement requires a lower oven temperature of 750 °C, which brings down the vitality prerequisites, and subsequently the utilization of petroleum products and emanation of carbon dioxide (CO2).
- Eco-Cement sets and solidifies by sequestering CO2 from the climate and is recyclable. The pace of assimilation of CO2 differs with the level of porosity and the measure of MgO. Carbonation happens rapidly from the outset and all the more gradually towards finishing. An ordinary Eco-Cement solid square would be required to completely carbonate inside a year.
- Eco-Cement can fuse a more prominent number of modern waste items as total than Portland bond as it is less antacid. This lessens the frequency of antacid total responses which cause harm to solidified cement. Eco-Cement likewise can be completely reused over into bond, should a solid structure become out of date.
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