With the increasing density of the world’s population, there is a clear need for resource and energy efficient construction methods. These trends position autoclaved cellular concretes (BCA) as a matter of course in the context of sustainable construction solutions. BCA is produced by mixing quicklime with cement, sand, gypsum, water and aluminum powder. This consequences in a swelling reaction of the mixture for forming light blocks having an airy honeycomb structure. These blocks are then placed in an autoclave in order to guarantee their resistance. They have outstanding thermal and sound insulation elements.
Get autoclaved aerated concrete Malaysia like this: a fine mixture of concrete is poured into special shapes in half the volume. At the same time, a shock load acts on it. When this happens, heat is generated due to the lime quenching. The temperature of the autoclave rises to 80 degrees.
After that, the reaction of lime with aluminum, which releases oxygen. For this reason, the concrete mass rises to the edge of the form. Pressure, like temperature, increases. Under the action of these values, the cement hardens, leaving the pores and, inside, already air in place of hydrogen. Thus, a concrete structure is formed, the pores of which occupy up to 80% of the volume. You can influence the porosity percentage by changing the amount of aluminum powder.
As a rule, the volume of concrete cement does not exceed 20% and more often uses Portland cement.
The accuracy of the structure of the production process depends on the type of aerated concrete produced. The general processes are as follows:
Preparation of the required number of components;
Preparing the mixture and introducing a blowing agent therein;
Fill in the form;
Remove excess mixture;
The production of autoclaved aerated concrete has a considerable advantage, namely the form of blocks. They have an ideal shape, the corners and edges of which are regular and smooth. The size of the blocks does not even change over time. Even dissimilar batches of blocks have unimportant errors in their size – only 1.5 mm. For units of the lowest category, this parameter can be 3 mm, but in relation to the unit as a whole, this indicator is not significant. For more articles like this one, click here.