How do you make a concrete foaming agent?

A standard recipe is 2 parts of cement and fine, dry sand to 1 part water and foam generator. You will want to have a quality foam generator to get the best results.

Why does lecithin foam?

The liquid or puree must be thick and or dense enough to hold its shape. For the foam to hold its shape for a period of time there must be some form of thickening or gelling agent present in the liquid.

How long does soy lecithin foam last?

about 30 to 60 minutes
The foams will usually last about 30 to 60 minutes, though they are constantly, if slowly, losing volume once they are created. The percent of lecithin added is usually between 0.25% to 1% of the weight of the liquid, 0.6% is a good starting point if you are unsure how much to use.

Can you use lecithin granules for foam?

Liquid lecithin doesn’t need to be dissolved to be used where powder and granules do. Lecithin can be used in cooking to make foams or emulsions (mixtures).

What makes a foaming agent good for concrete?

Synthetic agents are made from petroleum products. As far as I have been able to discover, some of them use a base material that is the same as used in shampoo. From there on there are other ingredients added that makes it more suitable as foaming agent to make foamed concrete.

Why are protein based foams used in concrete blocks?

Uses and formation: Protein based is commonly used for the low density and for higher densities synthetic foaming agents were preferred. Foam can create through forcing the chemical, air and water by restriction which results foam formation. Synthetic foam requires less energy while protein foams need more.

When does the fluidity of foam concrete increase?

With the increase of the dilution ratio, the fluidity of the foam concrete slurry increases gradually when the dilution ratio of foaming agent is in the range of 20-40 and 60-80, while it increases rapidly when the dilution ratio of the foaming agent varies from 40 to 60.

Which is the best foam to use on concrete?

Foam produce no reaction on concrete but it serves as a layer which is air trapped and forms no fumes or toxic. Protein based foaming agent requires comparatively more energy to make foam. It is prepared with raw material in presence of Ca (OH)2 and a small portion of NaHSO3.