The production of these blocks begins with the preparation of a base of silica sand and/or pulverized ash (PFA), lime, cement, gypsum / anhydrite, water and aluminum. Depending on the proportion of these components used, different types of concrete are obtained, each with different mechanical properties. Once the mixture is ready, the blocks undergo a material curing process in an autoclave.
The treatment process consists of:
1- Initial sweep: the steam valve and the aeration valve are opened simultaneously for a programmed time to apply an initial vacuum and expel part of the air inside the autoclave. This process allows to eliminate the pores in the surface of the concrete.
2- Heating and treatment: the steam is introduced in a controlled way inside the autoclave until reaching a temperature of over 190ºC and a steam pressure of 12 bar. Steam conditions are maintained for 6-12 hours to cure the aerated concrete.
3- Cooling: as it is steam treatment, depressurization and cooling are carried out in parallel by discharging the steam from inside the autoclave.
We are ATTSU industrial group
ATTSU manufactures boilers and pressure vessels since 1934. The needs of customers and the level of demand that we have always set, have made ATTSU, has created an industrial group, to give this service with the same philosophy to all Your clients.
Currently the ATTSU industrial group has 4 factories in Spain, Celrà (Girona), Sant Julià de Ramis (Girona), Mostoles (Madrid) and Paterna (Valencia), in which we develop the following activities, within the respective companies that make up the group.
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