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BHS-Sonthofen receives order from Indonesian precast concrete company

Published by , Editorial Assistant
World Cement,

BHS-Sonthofen (BHS) has received a follow-up order from a player in the Indonesian precast concrete industry. The order was for a twin-shaft batch mixer to be used for concrete pipe manufacturing.

The company’s twin-shaft batch mixers feature special drive technology that can handle demanding tasks. The company has supplied these mixers for a second time to a player in the Indonesian precast concrete industry, PT Calvary Abadi (Calvary). Contrary to popular opinion, this suggests that twin-shaft batch mixers are suitable for use with precast concrete.

PT Detede is authorised to advertise and sell the company’s products as an exclusive Indonesian cooperation and sales partner. The company produces complete concrete and asphalt mixing systems, while BHS supplies the mixers required for concrete manufacturing.

In March 2017, Calvary, the market leader for precast concrete and East Java/Surabaya, requested a BHS twin-shaft batch mixer from Detede – an unusual choice for precast concrete.

Pan and planetary mixers have dominated the precast parts industry for 30 years. It is thought that this is mainly due to the belief throughout the industry that twin-shaft batch mixers would only be suitable for use in precast concrete under certain conditions. According to BHS, industry players have assumed that the drive technology in these types of mixers would not be powerful enough for precast concrete applications, which place high demands on mixing technology. Precast parts require concrete with a lower water content than ready-mixed concrete, for example. This relative dryness makes the concrete tough, posing a challenge to mixing mechanisms and drives.

BHS has integrated type DKX worm gears into its twin-shaft batch mixers. These have operational safety and long service life, even under extreme conditions. Without a firm connection to the mixing trough, the gears are pushed onto the mixer shafts, allowing them to compensate for the changes in load that occur each time the mixer is loaded. BHS has suggested that this opens up a broad range of applications for its twin-shaft batch mixers.

Changing opinions

Before this order, Detede had always supplied Calvary with a pan or planetary mixer. Calvary was convinced and a follow up order was placed in March 2018, for two additional type DKXS 2.25 twin-shaft batch mixers.

The company is keen to ensure that the complete system manufacturers and end customers around the world become more familiar with the high performance of these mixers and their areas of application. It has stated that the pan and planetary mixers that have been the top choices for manufacturing precast parts cannot keep up with the efficiency and space-saving design of the BHS twin-shaft batch mixers. As a result of their complex design, the twin-shaft batch mixers require a smaller installation surface and fewer steel structures, while still enabling the same production volume. It is also possible to empty the mixers more quickly, shortening the mixing cycle and ultimately increasing performance in m3/hour, compared to pan mixers. Depending on their design, circular pan mixers take longer to empty.

The discharge of the company’s batch mixer, which is positioned centrally between mixer shafts, empties within a very short period, as the mixer shafts running opposite each other transport the concrete into the discharge shaft. Twin-shaft batch mixers are also capable of almost complete emptying.

As a result of this, the mixers are able to produce more output at the same batch size, thereby increasing the efficiency of the entire process. The special mixing technology offers customers a wide range of benefits.

“The mixer of type DKXS is highly versatile,” said Philipp Parnitzke, Area Sales Manager of the Asia/Pacific Region for BHS. “It is suitable for verious types of application, from pumped and ready-mixed concrete, to wet mortar and precast parts. We had to do some convincing when collaborating with the supplier on this project. We invented the twin-shaft mixer over 130 years ago and have continuously further developed it ever since. Our special, technically sophisticated drive configuration makes it possible to produce all types of concrete.”

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Cement news 2018