Air, nitrogen, carbon dioxide, or oxygen is delivered into the concrete slurry, after which it’s miles foamed by using bodily or chemical strategies. In the end, it is cured and made right into a tangible product with more micro-closed air holes and specific strength. It is called foam concrete.
(1) special substances
Lightweight aggregate is the use of lighter aggregates as opposed to regular sand and gravel aggregates.
foam concrete uses traditional aggregates.
(2) distinct overall performance
Due to the fact, the lightweight combination is lightweight, lightweight concrete has the characteristics of lightweight, correct thermal insulation, and fireplace resistance.
foam concrete makes use of physical foaming or chemical foaming strategies to introduce a huge variety of air bubbles into the pavement in order that the concrete has lighter bulk density and decreases thermal conductivity.
(3) special bulk density
The weight of lightweight concrete is 800-1400kg/m3. The power and thermal conductivity of light-weight concrete are better than foam concrete.
foam concrete has bubbles, and the bulk density is typically appropriate underneath 600kg/m3.
At this degree, physical foaming particularly makes use of the air compressor as an instrument to blow air into the foaming agent, the foaming agent solution is made into foam, and the slurry and foam are combined to reap foam concrete. Physical foaming can modify the overall performance of foam concrete by controlling the quantity of the foaming agent. The precept of the compressed air method is particularly to apply strain to blow air into the froth technique to form foam.
What’s a concrete foaming agent?
Currently generally used bodily foaming marketers include resin soap foaming agent, vegetable protein foaming agent, aluminum sulfonate foaming agent, animal protein foaming agent, hydrolyzed blood gel foaming agent, rosin acid soap foaming Agent. From the attitude of chemical composition, physical blowing agents specifically consist of surfactants and proteins. The more polar corporations within the surfactant structure include more hydrophilic agencies, the stronger the hydrophilic effect, and the better the bubble performance. However, the water content material on the surface of the froth layer is exceedingly high, which makes the stableness of the froth worse. On the identical time, the surfactant can interact with the cement particles, restrict the hydration response, and decrease the power of the foamed concrete. Protein-based foaming agents generate small molecules through the cleavage of peptide bonds and grow hydrophobic companies to form interfaces. Besides, hydrogen bonds are shaped between special businesses inside the unit, so that the solution paperwork a foam liquid movie with better strength. The vegetable protein foaming agent is soluble in water, hardly affected by water hardness, non-toxic, odorless, robust foaming ability, and dense and creamy foam. But, the stability of the foaming agent product is susceptible, and the foam stabilization time is short, which cannot obtain huge-scale use. Animal protein foaming agent has the characteristics of excessive foaming ratio, high electricity, brilliant balance, and low fee.
In precis, the method of the use of the foaming agent to make foamed concrete is greater appropriate for foamed concrete over four hundred kg/m3. The foam formed by means of mechanical rotation of the foaming machine or packed with gas, the cells are notably uniform, the radius is small, and the stability is especially solid. Most of the cells are closed cells, there are few connected cells, and the water absorption is exceptionally low.