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Newly formed CoGri Malaysia Sdn Bhd recently completed construction of a very special slab in Tesco’s largest purpose built distribution centre in SE Asia. Sited North of Kuala Lumpur in Bukit Beruntung, the 416 metre long warehouse is a massive 50,000m2 on a 25 acre plot of land which includes another 24000m2 for future expansion.
The main warehouse features 169 loading docks, 54,000 pallet spaces in 11 metre high selective racking.
Face Consultants prepared the design and specified the floor flatness as FM2 Special from the UK Concrete Society’s Technical Report No. 34. This specification is for conventional wide aisle storage that may be converted to very narrow aisle in the future. The tolerances are designed to allow the conversion from conventional to narrow aisle racking storage with very little floor flatness upgrading required.
To avoid casting during the heat, batching plant staff mobilised at 2:30 a.m. and the first truck arrived on site at 4 a.m. For this type of construction the metal fibre is integrated in the concrete truck. CoGri Malaysia chose to do the fibre integration at site with a conveyor. Usually fibres are introduced at the batching plant but doing it at site conserves fibres in the event that a load of concrete is rejected upon reaching the site.
Following fibre batching the concrete was placed direct from the truck in 4 meter wide strips working left to right and then struck to tolerance with a Somero S240 Laser Screed®.The laser controlled head of the S240 Laser Screed® incorporates an auger which strikes the concrete and pushes excess material out to the right side of the twelve foot wide head; a vibrator and a finishing blade smooth the just struck concrete surface. The only manual compaction of concrete done is around the perimeter joints to ensure that the load transfer dowels on the armour joints are fully enclosed with concrete. The last load of concrete was generally placed by 1 p.m. and finishing works completed seven to nine hours later.
Twenty days into casting, the racking and racking sprinklers erection started.
The project was completed on time and our team was demobilised from the site starting from the first week of June.
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The CoGri Group, a leading international specialist in concrete flooring, with offices throughout the world.
