Mixamate’s All-in-One Concrete Pumping Truck has been featured in the February issue of Concrete Magazine, in an article focussing on our recent work with GPSM DiveCo Ltd, a specialist company that provides underwater concreting services.
The job took place in South Quay Plaza, Canary Wharf, and used professional divers to assist in the laying of underwater concrete: “We chose Mixamate as they were able to provide us with the complete package from providing the grout through to cleaning the pump and removing waste” said Alex Smedley, Site Supervisor at South Quay Plaza for DiveCo. “Less personnel were required on site who would normally be mixing and operating the grout pump. For those that were needed, the health and safety risk was reduced due to not needing to handle COSHH materials directly, as it was all mixed internally on the lorry.”
6m3 of a special concrete mix were used to fill fabric formwork vertical socks that created temporary grouted stop-ends between an existing quay wall structure and a new sheet piled wall for the creation of a cofferdam. The grout sock was lowered into a vertical steel recess against the existing wall, with a maximum gap of 350mm at the top and a 135mm at the bottom. The cofferdam seals were then filled with a highly fluid sand-cement micro concrete, to form a near watertight seal between the existing quay wall and the steel sheet piles, which in turn allows works to continue on the quay wall.
For a series of images from the job, click here.