USE OF PIONEER RICE HUSK ASH
For Strength :
PIONEER RICE HUSK ASH has the potential to be used as a substitute silica fumes or micro silica as a much lower cost , without compromising on the quality aspect . Adding PIONEER RICE HUSK ASH to the concrete mix even in low replacement will dramatically enhance the workability , strength and impermeability of concrete mixes , while making the concrete durable to chemical attacks , abrasion and reinforcement corrosion , increasing the compressive strength by 10% - 20 % .For water proofing :
PIONEER RICE HUSK ASH has excellent water resistance ( impermeability ) properties and is used in waterproofing compounds to give amazing results. It reduces the water penetration by as much as 60 % .For Better Concrete in Marine environment:
Adding PIONEER RICE HUSK ASH to concrete and paints helps to reduce the chloride ion penetration by as much as 50 % into the structure , thus improving life of the building.For Lower heat of Hydration :
Adding PIONEER RICE HUSK ASH to concrete lowers the heat of hydration by as much as 30 % and prevents formation of cracks during casting.TECHNICAL SPECIFICATIONS :
SiO2 – Silica | 85 % minimum |
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Humidity | 2 % maximum |
Particle size | 25 microns |
Colour | Grey |
Loss on ignition at 800°C | 4 % maximum |
pH value | 8 |
Other Uses of PIONEER RICE HUSK ASH :
PIONEER RICE HUSK ASH acts as a very good insulator. PIONEER RICE HUSK ASH is also used for insulation of molten metal in tundish and ladle in slab caster . The temperature of molten metal in the ladle is around 1400 degrees centigrade and above . When this metal flows from ladle to tundish , the temperature drops to around 1250 degrees . This reduction in temperature leads to choking and causes breakdown in the slab caster.SOME DEFINITIONS :
Amorphous Silica : Rice Husk is burnt in controlled temperatures which is below 700 degrees centigrade . This ash generated is amorphous in nature . The transformation of this amorphous state to crystalline state takes place if the ash is exposed to high temperatures of above 850 degrees centigrade .Particle Size , Mesh Size and Grit No. | |||
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I.S.Specification | British Standard | American Standard | Grit No |
IS.460.62 | Specification.B.S.410.60 | Specification.ASTM.E 11.79 | |
5.60 mm | 3 mesh | No.3.50 | - |
4.75 mm | 3.5 mesh | No.4 | - |
4.00 mm | 4 mesh | No.5 | - |
3.35 mm | 5 mesh | No.6 | - |
2.80 mm | 6 mesh | No.7 | - |
2.36 mm | 7 mesh | No.8 | - |
2.00 mm | 8 mesh | No.10 | - |
1.70 mm | 10 mesh | No.12 | - |
1.40 mm | 12 mesh | No.14 | - |
1.18 mm | 14 mesh | No.16 | - |
1.00 mm | 16 mesh | No.18 | - |
850 microns | 18 mesh | No.20 | - |
710 microns | 22 mesh | No.25 | 24 |
600 microns | 25 mesh | No.30 | 30 |
500 microns | 30 mesh | No.35 | 36 |
425 microns | 36 mesh | No.40 | - |
355 microns | 44 mesh | No.45 | 46 |
300 microns | 52 mesh | No.50 | 54 |
250 microns | 60 mesh | No.60 | 60 |
212 microns | 72 mesh | No.70 | 70 |
180 microns | 85 mesh | No.80 | 80 |
150 microns | 100 mesh | No.100 | 90 |
125 microns | 120 mesh | No.120 | 100 |
106 microns | 150 mesh | No.140 | 120 |
90 microns | 170 mesh | No.170 | - |
75 microns | 200 mesh | No.200 | 150 |
63 microns | 240 mesh | No.230 | 180 |
53 microns | 300 mesh | No.270 | 220 |
45 microns | 350 mesh | No.325 | - |
38 microns | 400 mesh | No.400 | 300 |
32 microns | 450 mesh | No.450 | 340 |
25 microns | 500 mesh | No.500 | 380 |
20 microns | 635 mesh | No.635 | 450 |