Micropozz / Fly Ash

The Suyog Laboratory is well equipped with advanced machinery for the testing and evaluation of the physical and chemicals parameters of Micropozz specified in the Indian standard (IS 3812 Part-I).

Physical properties

• « Fineness by Blaine's Permeability method
  
• « Fineness by Retention on 45 micron sieve
  
• « Moisture Content
  
• « Workability
  
• « Compressive Strength

Chemical Properties:

• « Loss on Ignition (Un-burnt carbon content)
  
• « Silica + Alumina + Fe2O3 content
  
• « Silica content
  
• « Reactive Silica content
  
• « MgO content
  
• « Sulphuric Anhydride (SO3) content
  
• « Na2O content
  
• « Total Chlorides
  
• « Calcium Oxide content

The classified fly ash importantly cuts down the amount of unburned particles leading to a practically carbon free material. Maximum reactivity is acquired by rejecting the less reactive crystalline Fly Ash particles and by enhancing the particular surface of the final product. The usage of this modern pozzolanic Fly Ash material offers an impressive reduction of the mixing water needed and advanced strength development, allowing high replacement rates which are literally not possible with moderate cement additions.

The classified Fly Ash importantly cuts down the amount of unburned particles leading to a practically carbon free material. Maximum reactivity is acquired by rejecting the less reactive crystalline Fly Ash particles and by enhancing the particular surface of the final product. The usage of this modern pozzolanic Fly Ash material offers an impressive reduction of the mixing water needed and advanced strength development, allowing high replacement rates which are literally not possible with moderate cement additions.

The main advantages are:

Improved Workability

Addition of Micropozz to a concrete mixture increase the workability. When it replaces with same weight of cement the volume of mixture is much more higher then cement and therefore cementitious paste is greater, this allow more effective coating of the aggregate Also the shape of Micropozz is spherical and it works as a tiny ball bearing for around other particles, which reduce drag against each other

Improved Durability

Strength development in concrete of Micropozz is slower than cement which can grow in the voids left in the hardened cement matrix. Micropozz significantly reduces the void in the construction concrete. This is also beneficial to reduce permeability of concrete and thus improve the resistance to attack from chemical and salt.

Low Heat of Hydration

Because only part of the cementitious material reacts immediately with the addition of water the heat generated by that chemical reaction is also reduced. This is particularly important in warm climates as the risk of thermal stress leading to surface cracking is reduced and the surface of the concrete will be more uniform with the mix. A high quality finish can be achieved which with lower level of cracking.

Cost Effective
It is cost effective than cement as well as it has high bulk volume than cement

 

As Micropozz is a fine material with perfectly spherical particle shape, it produces a more cohesive concrete mix, which looks drier than normal. Usually, Micropozz concrete needs lesser fine aggregate as compared to pure ORDINARY PORTLAND CEMENT concrete in order to produce the best performance from the mix. As a thumb rule, every 10% of Micropozz used needs about 0.5% reduction in fine aggregates in normal concrete. The exception is ‘Self Compacting Concrete’ where the mix is designed to be high in fine material to reduce mix segregation and ensure it is capable of flowing properly.

Micropozz concrete visually appears more cohesive and less workable than pure OPC concrete. However, do not add water as this will reduce the strength and durability of the concrete. Because of the rounded shape of Micropozz particles, when vibrated the concrete will become highly mobile and should move readily within shutters.

Micropozz reduces the rate of bleeding within concrete. Bleed water that collects at the surface of concrete results in a localized increase in the water/cement ratio, reducing the strength and durability. However, because less water rises with Micropozz concretes they must be protected from excessive water loss, e.g. in drying windy weather conditions. If the surface of any concrete dries out before sufficient strength has developed early age drying shrinkage cracking may occur. Protection and curing should be carried out earlier to prevent cracking problems.

Micropozz concrete normally contains less water than the equivalent Ordinary Portland Cement concrete. If used with a water reducing admixture, e.g. plasticizer, the effects of reduced rate of bleeding are amplified. If retarding admixtures are used with concrete the risks of early age drying shrinkage cracking is increased.

GENERAL GUIDELINE
It replaces the significant proportion of cement in construction and will varies from 20 to 35% depend up on the type of construction. It has plasticizing effect on the concrete, thus have reduction in water to get same workability as shown in Portland cement. In addition you may find reduction in sand by 1-3% will be beneficial to the final mix. In general there is a slight slowing down in the setting time of concrete yielding slightly lower 7-days strength as compared to Ordinary Portland Cement Concrete. Although the concrete can be designed accordingly to achieve appropriate 7- days or early strengths.

Micropozz have many usage in civil and construction industries. It is used in Structural Concrete, Ready Mix Concrete, Plastering, Brick Mortar, Cement articles, Hume pipe, Light weight block (AAC).

Mortar for Plaster

Micropozz amends the surface finish of mortars and cut down the level of surface cracking it will also lead to a decrease in water penetration of the hardened product. The use of fly ash in plaster gives a better surface finish, more time for finishing and a virtually crack-free surface, leading to a higher quality look to all walls.

We would recommend a 25% - 40% replacement level of OPC cement by weight.

Mortar for Bricklaying
Fly Ash is an ideal product for bricklaying mortar due to the increased cohesiveness and flow ability of material when added to the mix.
We would recommend a replacement level of 30 - 45% of OPC cement by weight.



PACKING
Products are easily available, based on Client's requirement, in 40 kg HDPE bags, Jumbo bags carrying 1 - 1.3 MT. , loose supply in 20 - 25 MT road tankers (bulkers).


We have our own network of distribution for doorstep delivery to our clients. In a changing business environment we should always be prepared to satisfy our customer`s demand.

FAQs of Micropozz / Fly Ash: