Calls for carbon rating system for concrete
Experts have proposed a standardised carbon rating system to allow clients and designers to choose low-carbon concrete. The recommendation was made in the Low Carbon Concrete Routemap. The report is a result of a collaboration between the Green Construction Board and the Institution of Civil Engineers (ICE). It brings together experts including the Concrete Centre, Mott MacDonald and Cemex.
The report sets out three decarbonisation routes to 2050. They are based on what action the industry takes and how fast carbon sequestration in concrete advances.
Even under the most modest route, emissions are expected to fall from 10m tonnes CO2e in 2022 to 5m tonnes in 2035. Under the most optimistic scenario, the concrete industry could absorb more greenhouse gases than it emits in the 2040s.
And the report predicts this will lead to cost savings, ranging from £2.5bn to £10.5bn by 2050, depending on how quickly the industry decarbonises.
The recommendations for clients, designers, contractors and suppliers include:
- An industry-wide rating system to disclose the carbon embedded in different concrete mixtures.
- Options for reducing the cement content. These include using limestone and calcined clays as fly ash and blast furnace slag become less available.
- Design approaches that use less concrete or lower-carbon concrete, such as using voids, coffers, non-structural fill and smaller spans between columns.
- Giving concrete suppliers maximum time and flexibility to choose a mix that meets the requirements with the minimum carbon.
- Updating technical standards to reflect the priority of reducing carbon and the latest materials and techniques.
Andrew Mullholland, Chair of the Low Carbon Concrete Group and co-author of the report, said: "The next 10 to 15 years are critical in driving the carbon out of concrete. There are steps we can all take immediately to minimise the quantity of concrete we use and the carbon intensity of production, and this change should be driven by clients. This will require motivation and substantial effort from across the industry."
Andy Mitchell, co-Chair of the Construction Leadership Council, said: "This report pulls together a wealth of practical advice and best practice from across the industry. But more importantly, it charts a route forward to net zero which must increasingly be the guiding principle of every construction project. I call on peers across the industry to read this report and take up its recommendations as soon as possible."
This article first appeared in the CIAT website news section under the same name on May 2 and is available here.
The ICE published report discussed above 'Low Carbon Concrete Routemap' can be downloaded here.
--CIAT
[edit] Related articles on Designing Buildings
- Aggregate.
- Archaeology.
- Admixture, additive or agent.
- Admixtures in concrete.
- Alkali-activated binder.
- Alkali-aggregate reaction (AAR).
- Alkali-silica reaction (ASR).
- Architectural concrete.
- Broad glass.
- Blockwork.
- Cast iron.
- Cast-in-place concrete.
- Cellular concrete.
- Cement and concrete companies release 2050 Climate Ambition.
- Cement-free precast product.
- Cement mortar.
- Concrete batching plants.
- Concrete boom pumps.
- Concrete in aggressive ground (SD 1).
- Concrete joints.
- Concrete masonry unit CMU.
- Concrete repair mortars.
- Concrete-steel composite structures.
- Concrete superplasticizer.
- Concrete to cover.
- Concrete vs. steel.
- Concreting plant.
- Concrete.
- Conservation.
- Clinker in construction.
- Decarbonising concrete in the UK.
- Dust heap.
- Glass blowing.
- Glass.
- Heritage.
- Historic England.
- Limestone calcined clay cement LC3.
- Portland cement.
- Stained glass.
- The 18th century schooner Peggy.
Featured articles and news
Shortlist for the 2025 Roofscape Design Awards
Talent and innovation showcase announcement from the trussed rafter industry.
OpenUSD possibilities: Look before you leap
Being ready for the OpenUSD solutions set to transform architecture and design.
Global Asbestos Awareness Week 2025
Highlighting the continuing threat to trades persons.
Retrofit of Buildings, a CIOB Technical Publication
Now available in Arabic and Chinese aswell as English.
The context, schemes, standards, roles and relevance of the Building Safety Act.
Retrofit 25 – What's Stopping Us?
Exhibition Opens at The Building Centre.
Types of work to existing buildings
A simple circular economy wiki breakdown with further links.
A threat to the creativity that makes London special.
How can digital twins boost profitability within construction?
The smart construction dashboard, as-built data and site changes forming an accurate digital twin.
Unlocking surplus public defence land and more to speed up the delivery of housing.
The Planning and Infrastructure Bill
An outline of the bill with a mix of reactions on potential impacts from IHBC, CIEEM, CIC, ACE and EIC.
Farnborough College Unveils its Half-house for Sustainable Construction Training.
Spring Statement 2025 with reactions from industry
Confirming previously announced funding, and welfare changes amid adjusted growth forecast.
Scottish Government responds to Grenfell report
As fund for unsafe cladding assessments is launched.
CLC and BSR process map for HRB approvals
One of the initial outputs of their weekly BSR meetings.
Building Safety Levy technical consultation response
Details of the planned levy now due in 2026.
Great British Energy install solar on school and NHS sites
200 schools and 200 NHS sites to get solar systems, as first project of the newly formed government initiative.
600 million for 60,000 more skilled construction workers
Announced by Treasury ahead of the Spring Statement.
Comments