Frequently asked questions

Q. What is it Light weight concrete?

Ans. Lightweight concrete - or foamed concrete - is a versatile material which consists primarily of a cement based mortar mixed with at least 20% of volume air. The material is now being used in an ever increasing number of applications, ranging from onestep house casting to low density void fill. Foamed concrete has a surprisingly long history and was first patented in 1923, mainly for use as an insulation material. Although there is evidence that the Romans used air entrainers to decrease density, this was not really a true foamed concrete. Significant improvements over the past 20 years in production equipment and better quality surfactants (foaming agents) has enabled the use of foamed concrete on a larger scale. Lightweight concrete and free flowing, it is a material suitable for a wide range of purposes such as, but not limited to, panels and block production, floor and roof screeds, wall casting, complete house casting, sound barrier walls, floating homes, void infill, slope protection, outdoor furniture and many more applications. Not everyone knows that density and compressive strength can be controlled. In the light weight concrete this is done by introducing air through the proprietary foam process which enables one to control density and strength precisely. Normal concrete has a density of 2,400 kg/m3 while densities range from 1,800, 1,700, 1,600 down to 300 kg/m3. Compressive strengths range from up to 40 mpa down to almost zero for the really low densities. Generally it has more than excellent thermal and sound insulating properties, a good fire rating, is non combustible and features cost savings through construction speed and ease of handling. The technology is the result of over 20 years of R&D, fine tuning the product and researching the possible applications. It is used in over 40 countries world wide today and has not reached the end of its possible uses.

Q. How strong is it?

Q. What are the advantages of pre-formed foam?

Q. What are the disadvantages of lightweight concrete, compared to typical concrete?

Q. Is segregation a problem

Q. Is lightweight concrete chemically compatible with common additives?

Q. What additives are common to cellular concrete?

Q. What is the correct water to cement ratio for the cement water slurry?

Q. Does lightweight concrete mix contain either fine or course aggregate?

Q. What type of cement is appropriate for lightweight concrete?

Q. Is it appropriate to reinforce cellular concrete with synthetic fibers?

Q. Do the bubbles in lightweight concrete collapse, reducing its volume?

Q. Densities and Strengths

Q. What are the different densities and strengths available?

Q. How much does lightweight concrete cost?

Q. Is lightweight concrete suitable for long-term use as a marine float device?

Q. How do I test lightweight concrete to determine it is performing to specs?