In March 2020, an electric RM 60E with an RM CS2500 post-screen was delivered to Manamah, Bahrain to recycle residues from concrete production. The customer is highly satisfied with his alternative to cost-intensive aggregate purchases and imports from the mainland.

Country Bahrain
Customer Al Kobaisi Group
Machines RM 60E + RM CS2500 2D
Material Residues from concrete production
Feed material < 500mm
Final aggregate 0-5, 5-10mm
Average throughput 25 t/h at about 50% oversize
Application Aggregate for concrete blocks


East of Saudi Arabia and west of Qatar is a small group of islands in the Persian Gulf, which is known worldwide for its high-quality oyster pearls. The Kingdom of Bahrain, which mainly consists of desert, is also home to the Al Kobaisi Group with over 1,500 employees. Besides automobile construction, real estate, tourism and media production, the Al Kobaisi Group specializes in construction and the production of concrete blocks. Today, they are one of the three largest concrete manufacturers in Bahrain. Precisely there, or rather in the capital Manamah, an electric RM 60E recycles residues from concrete production together with an RM CS2500 post-screen since spring 2020.


The last Bahraini quarry was closed five years ago, which is why the company had to rely mainly on cost-intensive aggregate imports from the United Arab Emirates. Thanks to the RM machines, an alternative was created that not only saves money, but also makes the customer Al Kobaisi Block Factory much more flexible: concrete residues are now electrically recycled on site and prepared for the production of new concrete blocks. The purely electrically driven RM 60E impact crusher produces very clean end material that can be recycled entirely.


For the Al Kobaisi Group it’s the first crushing and screening plant ever to be invested in. After thorough research, the decision in favour of RUBBLE MASTER products was quickly made. The compact size and semi-mobility of the impact crusher as well as the excellent throughput capacity and reliable final grain quality convinced the customer. The decision was made to purchase the electrically driven and much more environmentally friendly version of the RM 60, as there is a high level of fine dust pollution in Bahrain.


The Al Kobaisi Group now also benefits from the excellent local after sales service. With the purchase of a RUBBLE MASTER product a long-term partnership begins. RM Lifetime Support with its dedicated, highly trained dealer network ensures the best possible support – throughout the entire machine life.


Kobaisi_Bahrain Beton brechen und sieben

Our crushers in action

RM 60

The RM 60 is the most compact RM crusher and the ideal choice for processing smaller quantities for businesses which are looking to expand their activities and increase profits. Like all RM crushers, the 12 tonne model can also be combined with high-performance pre-screens and post-screens.

RM CS post-screens

The powerful linear oscillation screens in the CS series transform your recycling material and natural rock into high quality standardised grain sizes. Even at high throughputs, these post screens feature 100% screening accuracy between the fractions.

Contact us for more information

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+43 732 73 71 17 – 0

Natural rock

Crushing at a high output and low wear, and that in every possible and impossible location, is not an issue for RM crushers. They manage to generate the highest quality value grain from natural stone on site. Depending on the desired combination of machinery. The end result is always cubic aggregate.

Abrasive rock

Quartz gravel, granite and riverbed gravel are not easy to process because high levels of quartz cause high wear. However, RM crushers are designed for such materials: thanks to their compact size they can achieve high throughputs even in tight spaces, producing valuable aggregate directly on site at all times.

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Demolition work and mobile recycling have been part of Manfred Schrefler’s range of services since 2016; previously he was known primarily for transport and earthwork. In terms of machinery, the Upper Austrian relies on top quality and always has the very latest technology.

Basalt preparation

Crushed basalt is used for a variety of purposes. Most often, it is crushed to be used as an aggregate in construction projects.

Increase in orders with cuboid final aggregate

In Mexico the RM 100GO! replaces a jaw and cone crusher combination. Basalt with a diameter of up to 500 mm is crushed into different sizes of cuboid final aggregate, which is then reused for asphalt production. Final aggregate grades between 0-19 and 0 25 mm are processed to a high standard without any problems.

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The first mobile RM crusher in Gorontalo, Indonesia, has been in operation since spring 2017. The new RM 70GO! 2.0 replaces several machines at once: instead of using the jaw crusher combined with a cone crusher, this mobile crusher unit processes extremely hard river basalt in a single pass.