The mortar that
is used to fill the wall cavity is essentially concrete without stone. The mix design
of the mortar is specifically determined by laboratory tests that are carried out
on local sand or aggregate, to ensure that quality standards are adhered to. The
density of the mortar will vary depending on the sieve grading of the sand used,
but will range between 1600 to 1800 kg per cubic meter. The mortar mixture produces
a fast curing aerated mortar which flows easily, is waterproof and possesses good
thermal and sound insulating properties.
What is
filled with?
One generic cubic meter of mortar consists of: *
- 1800kg or 0.720m3 of local decomposed granite / river sand
- 250kg of ordinary Portland cement: (OPC)
- 5 litres of moladiCHEM, a non-toxic, water based chemical cocktail
- 200 litres of water
* Please note that the above is a generic site mix ratio and will be
variefied with trail mixes at the site mix plant.
Fly ash can be used as an extender to substitute the use of cement in order to reduce
the volume of cement, but will still achieve the same ultimate compressive strength
- mPa. A compressive strength of between 10 and 30 mPa can be achieved in a 28-day
period, depending on the cement: water ratio. Under normal conditions the mortar
usually sets during the night (12 to 15 hours) and the formwork is removed the following
morning. There is no need to vibrate the mortar in order to achieve a smooth finish.
The application of
is 1litre per 50kg of cement. At the start of each project, cube tests are to be
carried out, which would determine the compressive strength of the mix design specific
to each project.
Key Points;
- Custom Mix design
- Fast Curing Aerated Mortar
- Flows Easily
- Waterproof
- Good thermal properties
- Mortar sets during the night
- No need to vibrate