Dry pack mortar or floor mud or deck mud is a blend of cement, sand, and sufficient water to hydrate cement for undergoing chemical changes. Dry pack mortar is capable to do the following –
- Repair small cracks
- In plasterwork
- Fill gaps between pavers
- Fill drill holes and boreholes
- Level concrete bed
- Fill narrow slots deeper than its breadth
- Acts as a waterproofing membrane
- During tile installation as well as bricks & blocks paving
Dry mix mortar from Bisley International is used to apply in flooring, tiles, facades, industrial grouts, and concrete repairs for more than 20 years. Established in Houston, TX Bisley is a global raw material supplier.
Mixture proportion of dry pack mortar
The sand and cement proportion will depend on the kind of task it is used for. Generally, the proportion is maintained with 2 ½ part sand and 1 part cement. The sand has to be mud or organic material free and easily pass-through sieve number 16. The cement has to be fresh and free from lumps. The amount of water has to be sufficient enough to hydrate and prepare cement for undergoing chemical changes.
This mortar needs to be mixed properly and the consistency of this mixture, when transformed into a ball, must retain its shape when placed on the surface. It must not slump or crumble down. However, the cement and water ratio can differ as it depends on the mixture quality.
When to apply the dry mortar mix?
Dry mortar mix has to be placed instantly on the surface after proper mixing. Nevertheless, ensure to clean the surface thoroughly before placing the mixture. For repair works, pour the surface with a thin bonding grout layer of 1:1 c/s. Make sure to use it before the bond grout turns dry.
Place the mortar layers and compact them with a tamping rod for avoiding pores. Every layer of dry mortar mix must not exceed 10mm. Use a wooden tamping rod instead of metallic rods to even out the surface. When dry mortar mix is used below tiles as a bed then a heavy object is placed on it for 24 hours to improve mortar setting.
Dry mortar mix needs curing for a maximum of two weeks. During the curing process, wet gunny bags are used to keep surfaces wet. Curing enhances the strength of the mortar and prevents cracking.
- Erroneous mixture batching is eliminated and maintains work quality.
- Easy application.
- No need to spend time mixing cement and sand on the job site.
- Used for external and internal purposes.
- Tamped with ease in shapes thus allowing to obtain sloping surface, if necessary.
- A better finishing surface is obtained.
- For large jobs, dry pack mortar usage ensures a consistent mix.
- Not appropriate to use for major repair works.
- The shrinking possibility of dry pack mortar is high.
- Cannot be used for tasks where less mortar thickness is needed.
- Adding proper water amount to maintain consistency is tedious.
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