This news article was originally written in Spanish. It has been automatically translated for your convenience. Reasonable efforts have been made to provide an accurate translation, however, no automated translation is perfect nor is it intended to replace a human translator. The original article in Spanish can be viewed at Hormigón autocompactable (HAC) en Precat
Precat concrete amount (HAC)
15/12/2005
The company uses the HAC for prefabricated structures.
The amount concrete used in civil engineering in a very limited way, is highly effective in the manufacture of prefabricated structures, thanks both to its high fluidity and resistance to segregation that presents. It is a concrete that allows perfectly fill anywhere in a formwork, regardless of the form and armed you have, simply pouring it and without vibration.
Therefore, Precat opted for the concrete amount since its inception, in 2002. The company, with headquarters in Vila-Rodona (Tarragona), dedicated to the manufacture of prefabricated structures for industrial buildings and construction of public and private use, uses the HAC in all its production, making it the first installation of concrete prefabricated in Spain working with HAC in the entire chain of production.
This implies a number of features identified in Precat installations, from production lines of 300 m to the absence of vibrators coupled to the mould, in the absence of noise by vibration. Prefabricated pieces that meet the highest demands on quality, heavily armed and excellent finishes are obtained with this system.
This implies a number of features identified in Precat installations, from production lines of 300 m to the absence of vibrators coupled to the mould, in the absence of noise by vibration. Prefabricated pieces that meet the highest demands on quality, heavily armed and excellent finishes are obtained with this system.
In this type of installation, the concrete is placed through a rotating cuba that moves on a rail above the production line. Thus, concrete kneaded continuously before his placement while employed dumping system allows the adjustment of the fluidity, readitivando in the case it is necessary (if there were an accidental stop of production)(, etc.).
This achieves take full advantage of the HAC reducing also the time of manufacture.
Precat facilities in Vila-rodona (Tarragona)
Precat counted with the collaboration of Sika to develop the composition of the different HAC required depending on the different types of parts to be manufactured. As well, after analyzing the local materials, they chose to use a crushed aggregate from a nearby quarry. After that, the industrial tests carried out have resulted in concrete of perfect autocompacidad. Currently, Precat is ready to make an average of 200 m3 of HAC per day for the production of their prefabricated.
Related Companies or Entities
Sika, S.A.U.
