Product category:
Concrete, Cement, Admixtures
News Release from: Raumo Automaatika | Subject: Autoclaved aerated concrete
Edited by the Buildingtalk Editorial
Team on 03 February 2005
Production of autoclaved aerated
concrete
SCADA and control systems for production of autoclaved aerated concrete.
Estonian market for autoclaved aerated concrete ( AAC ) was long time dominated by imported production Aeroc Group and Raumo Automaatika LLC established a modern low cost AAC production plant in North-East Estonia
This article was originally published on Buildingtalk on 13 Oct 2004 at 8.00am (UK)
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AAC is an ultralightweight concrete building material produced from sand, lime, cement, water and an expansion agent.
The finished AAC products weigh as little as one-fifth the weight of ordinary concrete.
The weighing and conveying systems supplied by Raumo Automaatika are based on Omron Sysmac PLCs running the Cx-Supervisor SCADA packages under Windows NT or XP.
The batching system consists of three batching weigh vessels for powders materials, slurries and water and one vessel for expansion agent.
The main batching and mixing page shows store tanks of cement, lime, water and weigh vessels used to weigh out the ingredients of raw materials.
After the weighing cycle materials are released into the mixer for a pretermined time.
Finally the mixture is cast into the mould.
Filled moulds moved to the the special chamber where a chemical reaction expands the mixture and forms small, finely dispersed air pores.
Conveying moulds true the chamber is contrelled by another SCADA application.
Target values of ingredients in mix desigd depend on preset values of parameters and a current temperatures of raw materials in the store tanks.
The SCADA system permanently cheks the parameters and automatically calculates new target values for each batching cycle.
Formulas for calculating target values are written by script commands in the Cx-Supervisor.
The office supervision is linked with the control system for the plant floor by the Industrial Ethernet.
This solution helps data exchange between these two floors.
User interface that is created in main server provides common area for production information and platform for development of production application.
All data is integrated into storage location giving user access to the chronologically referenced data.
It brings the potency of the company data base closer to to the manufacturing process.
Before establishing the plant Aeroc was a distributor of imported AAC products.
Today this company is a major indigenous manufacturer of AAC blocks and is known as a reliable supplier and manufacturer in Estonia, Finland, Latvia and North-West Russia.
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