The present invention relates to a foaming agent for lightweight concrete. It provides a formulated anionic surfactant that can provide stable foam in low density lightweight cementitious formulations.
It also has a range of particle size to promote the embedding of air bubbles in the concrete mix and improve the strength. It may be used in a small proportion not less than about 0.3% by weight of the cement.
A formulated anionic surfactant that can be mixed with air from an air pressure foam generator to produce a stable foam. It is an ideal choice for use in a variety of lightweight cementitious materials.
Depending on the production method and technology, the consumption of the foaming agent can vary between 200 g/m3 to 800 g/m3. The foaming agent is produced by diluting in water and then producing in a concrete foam generator using compressed air.
The optimum foaming agent mix proportion is determined on the basis of target density, w/c (water/cement) and s/c (sand to cement) of lightweight foamed concrete. It is possible to achieve densities of 1500, 1750 and 1800 kg/m3 by varying the amount of foaming agent.
Foaming agents are produced from a variety of chemicals, including soaps and synthetics designed to make small bubbles and last a long time in the mix. There are many different types of foaming agents, and the choice depends on your requirements and budget.
For a optimum w/c ratio, you need to be sure that the amount of water added is high enough to create a strong mortar. The W/C ratio is also affected by the type of plasticiser used in the slurry. It is common practice to add a superplasticizer to increase the strength of a mortar.