Over 20,000m3 of nuclear-grade concrete was poured using concrete pumps
Workers building the Hinkley Point C nuclear power station have completed the 49,000-tonne base for the station’s second reactor. The pour was completed on schedule – meeting a target date set more than four years ago. The final concrete pour of 8,991m3 set a new UK record for a single, continuous pour. It surpasses by 37m3 the previous record during construction of the base for Hinkley Point C’s first unit in June 2019.
The final concrete pour for Unit 2 continued around the clock
This major milestone in nuclear construction was completed by teams that have had to adapt to new Coronavirus working conditions. Their achievement, known as “J-zero”, comes less than a year after the completion of the first reactor’s base in June 2019. It is the second major goal in 2020 and the successful completion of both follows the achievement of all the project goals in 2019. The date for achieving J-zero on Unit 2 was set more than four years, before the final investment decision was taken.
Final section of the 20,693m3 of concrete being poured into the foundation of Unit 2’s Nuclear Island
Construction during the current Coronavirus crisis was able to continue after the project took a wide range of steps to ensure the safety of workers and the community. This included reducing numbers on site to enable social distancing and concentrating on the most critical areas of construction.
The A14 Cambridge to Huntingdon improvement scheme has opened more than 6 months early. Congratulations to Highways England, the Costain, Skanska, Balfour Beatty jv and especially to the Camfaud team that did such sterling work on this flagship project.
The A14 Cambridge to Huntingdon improvement scheme – now open
Pumping a bridge deck on the A14 Cambridge to Huntingdon improvement scheme
While London whiles away the weekends, Camfaud is at work repairing the capital’s infrastructure.
Our most recent job involved pumping rapid setting concrete underground to form a tunnel trackbed. Our “troglodyte team” manned the pumps (and the pipelines!) round the clock to enable the concrete to be placed as soon as the track was aligned and the slab ready to be poured.
It is usual, when pumping long pipelines, to use 125mm pipeline. However, for this contract, 100mm pipeline was preferred in order to increase the velocity of the material through the line and thus minimise the chance of the rapid setting mix going off in the pipes.
Pumping rapid setting concrete
The troglodyte team in action
Camfaud’s Troglodyte Team
One Nine Elms – 34 hour pour
We recently pumped approximately 5,000 cubic metres of concrete into the basement of One Nine Elms, a mixed-use skyscraper development in South West London. Camfaud supplied four pumps, two Putzmeister pumps and two Schwing pumps for the pour. We also supplied backup pumps though, in the event, these were not required to work.
The pour, was carried out for Careys Civil Engineering. It lasted nearly 36 hours and finished on Sunday 17th March, allowing the Irish contingent a double celebration on St Patrick’s Day.
London Concrete supplied the concrete, a 75% GGBS 25% cement mix. It was their second largest continuous pour after the 5,500 cubic metre pour they carried out in 2009 at the Shard. The success of the pour was highlighted in an article in The Construction Index.
Construction Index article – One Nine Elms