Laing O'Rourke

Everton Stadium

Client

Laing O'Rourke

Completed

Result

3 days saved per pour

Laing O'Rourke is using ground granulated blast-furnace slag (GGBS), a low-carbon cement alternative, at Everton FC's new stadium. Despite GGBS's longer cycle time, the team has been able to save three days per pour thanks to real-time maturity data from Converge sensors.

Supporting the Reduction of Embodied Carbon at Everton Stadium

Laing O’Rourke are pouring a number of different concrete mixes at the new Everton FC stadium which consist of a higher volume of ground granulated blast-furnace slag (GGBS). GGBS is a low-carbon cement alternative that can be up to double its 28-day design strength after 10 years of curing.

The drawback, however, is that the cycle times are longer.

The Solution

By using embedded Converge sensors in the slabs, and analysing real-time maturity data, Laing O’Rourke can claw back this time by striking falsework at the earliest opportunity, without delay.

Key Benefits

Decreased pour-cycle length

After performing a calibration for each mix to be used, Laing O'Rourke were able to see real-time strength data on the ConcreteDNA platform. This allowed them to remove formwork as soon as each pour had reached strength (47 MPa), without delay.

Temperature/Strength graphs available in the platform were used by Engineers to document strike orders to remove formwork after strength had been reached.

On average, pour cycles were shortened by 3 days per pour. This translated to labour savings of 360 hours.

Reliable, wireless, and embedded solution

On a previous project, Laing O'Rourke had used an un-embedded solution which tended to get damaged and lose data.

Although you get value from the traditional test cube processes, being able to supplement these with more accurate real-time data from innovative sensors, has been beneficial in enabling us to determine actual in-situ strength gain within the poured slabs. While Converge Signal is more expensive, it works a lot better and we don't ever worry about losing data since we can collect it from our phones as a failsafe.

Gregory Deane, Senior Engineer, Laing O'Rourke

At Everton we're using low-carbon mixes that have longer strike times. We can claw back efficiency thanks to Converge's embedded sensors, which provide us with real-time curing data, rather than wait for cubes to return from the lab. While the Converge sensor is more expensive, it works a lot better and we don't ever worry about losing data since we can collect it from our phones as a failsafe.
Gregory Deane
Senior Engineer, Laing O'Rourke

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