What is polymer modified mortar? - Their types & applications.

 1. What is polymer-modified mortar?

As the name suggests, polymeric admixtures are added with portland cement, sand, & water to enhance certain qualities of the mortar. 

The addition of polymer improves toughness, adhesion, bonding, tensile strength,  flexural strength, chemical resistance, etc. within the mortar.

2. What are the different types of polymers that are used in making polymer-modified mortars?

The different types of polymers are as follows.

▪  Latex polymers

▪ Emulsified polymers.

▪ Water-soluble polymers  👉  polyvinyl alcohol.

▪ Re-dispersible polymers 👉  ethylene vinyl acetate.

3. Where do we use polymer-modified mortar?

They are used in

▪ Waterproofing:

Polymer-modified mortars are good in providing resistance against chemicals & penetration of water. Therefore, they are used in structural works such as water tanks, septic tanks, basements, etc. 

▪ Grouting:

Polymer-modified mortars are the best suitable materials for grouting works in joints, tiles, structural members, walls, etc. 

▪ Repair works:

They have good adhesion & bonding properties. They are less susceptible to shrinkage & thermal variations.

Hence, they are good at patching, resurfacing, or overlaying works of damaged areas. It is also used in repairing cracks in concrete structures. 

▪ Flooring: 

Used in commercial & public buildings as a base layer of floorings. Mostly, they are utilized in the flooring work of warehouses, hospitals, factories, garages, etc.

4. What is the composition (ratio) of polymer-modified mortar?

Fine aggregate to cement ratio 👉 1:2 to 1:3 ( ratio by wt.)

 Water cement ratio 👉  0.3 to 0.5

The percentage of polymer added will be 5 to 20% of cement depending upon the type of polymer & specification.

5. Is polymer-modified mortar waterproof?

The addition of polymer improves the impermeability, viscosity, & durability of mortar. polymer modified mortar has higher crack resistance properties when compared to regular mortars. They also reduce the capillary water absorption & penetration depth of water to a certain extent.

However, they are not replacements for waterproofing compounds.  

For more such explanatory articles, click here.

Thank you for going through this article❤. Have a good day 😄.

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