Rødvig Sand Lime

Rødvig Sand Lime
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Product Description

The sand lime is a mixture of 4 parts well-matured Rødvig slaked lime and 1 part sand no. 00 (0,0-0,3) or no. 000 (0,0-0,1) and 3 parts lime water. The product is ready to use but you have to whip it thoroughly before and during use. 

Field of Application

Due to the amount of sand, Rødvig sand lime has a thicker consistency than regular lime milk. Therefore, it is suitable for the first coating of newly polished facades and other surfaces where there is a need to provide a better base for subsequent strokes. This may reduce the number of required layers. It can also be used internally to refresh the walls and ceiling.

Packaging

Sand lime is stored and sold in 13-litre plastic buckets (approx. 18 kg) with hermetic lids. 

The sand lime is also delivered with lime-proof colours on request. 

Additional Information

KALK A/S has been the market leader for many years with products used for renovation of conservation and listed buildings among others. The products can also be used for new construction because of the good physical properties of the material: 

  • Great flexibility in use
  • Great elasticity and adhesion
  • High tensile strength
  • Good porosity, which provides excellent insulation and moisture conditions.

We have extensive experience in assisting clients in the use of our products. The technical guidance, which we can offer, merely serves to aid you with experiences. Therefore, we do not take on the responsibility of being planning technicians. With regards to renovation work, we can refer to technicians who are familiar with renovation work on buildings worthy of preservation. 

 

 

 

 

Mixing

Preparation of sand lime on the site:
A suitable number of buckets of Rødvig slaked lime are available, as well as a suitable number of bags of Kronhøj mortar sand in the desired fraction.

For the manufacturing of sand lime, you mix:
4 parts lime putty
1 part quartz sand
3 parts lime water 

The mixture is stirred thoroughly in a tub by using e.g. drilling machine with a whisk attached.

The sand lime should be prepared in good time before use and stored in plastic buckets with hermetic lids. The purpose of the lid is to stop the passage of the air and thereby a quick hardening on the surface in form of a layer of lime crystals CaCO3 .

The stirring of the sand lime with colour is carried out in the same way as with lime milk.

Execution

It is used where a better base for subsequent lime treatment is desired, or as a preliminary treatment on a difficult base, where it is difficult for the lime to stay whole, e.g. a base of lime cement mortar. Sand lime can also be used as a finishing treatment - with or without colour.

Preliminary treatment:
The facades are cleared of mortar spatters or the like, without the use of acid.

Watering down:
Watering down the base is done with a hose with a spreader nozzle that has been set to spread. An area of the wall is watered down until the wall is shiny (not soaking) and then becomes dull.

Preliminary treatment with lime water:
It is recommended that after watering down, you coat or spray some lime water on the wall before the whitewashing is to be carried out. Lime water serves as a natural grounder and at the same time, it seeps a little into the damp plaster. The watering down ensures that whitewashing is done wet-to-wet, making the sand lime blend together more easily, without dents or stripes. 

It is recommended that after watering down, you coat or spray some lime water on the wall before the whitewashing is to be carried out. Lime water serves as a natural grounder and at the same time, it seeps a little into the damp plaster. The watering down ensures that whitewashing is done wet-to-wet, making the sand lime blend together more easily, without dents or stripes. 

Sand lime treatment must be carried out continuously to places where boundaries are not usually seen, e.g. one side at a time. This process may be interrupted by downpipes or cornice protrusions. When whitewashing, you need to stir in the bucket constantly, otherwise the remaining sand lime in the bucket will be too strong. If you take a break or after you are done, the bucket must be closed hermetically. Whitewashing is done once or twice, usually with a 1-3 day interval. Once you have covered the entire area, you proceed with the subsequent treatments. On those areas where sand lime has been used as a finishing treatment, you finalise with lime water. Whitewashing is done by using a smoothing sponge or a limer.

Subsequent treatments should not be carried out before the previous treatment has dried (hardened), normally after 1 day.

Time of performing:
The time best for working with lime-based products is during the months of spring or fall, when the relative air humidity is around 65-75%. 

Limitations of Use

The best time for carrying out the work is during the spring or fall, due to the relatively high air humidity. The temperature must be above +5° and below +25°. The work should be carried out in the shadow.

Storage

Sand lime should be stored with hermetic lids and in a frost-free location.

 

 

 


You can find product sheet, safety data sheet and performance declaration for Rødvig Lime Water by clicking on the image below.