University of Manchester spinout Concretene has secured £4.5m in the first close of a Series A funding round to expand production and testing of graphene-enhanced concrete additives. The financing includes £2m from an investment vehicle associated with the Northern Powerhouse Investment Fund II, managed by PXN Ventures. Existing backers LocalGlobe and Molten Ventures also participated, supporting the company’s move towards industrial-scale manufacturing.
Concretene develops an admixture designed to alter the performance of concrete mixes through the use of graphene. Concrete is a widely used construction material, but cement production contributes materially to the embodied carbon associated with many structures. If an additive allows a mix to achieve its required engineering characteristics with less cement, it could reduce that footprint. The scale of the benefit depends on mix design, input materials, performance requirements and the production method used to make the additive itself.
The company has reported earlier trials suggesting that its technology could reduce cement requirements by roughly 10% to 20% in some commonly used mixes without compromising specified strength or durability. These are company-reported findings from development and testing rather than a universal performance guarantee for every construction application. Concrete used in different structures must satisfy different standards concerning workability, curing, strength, exposure conditions and long-term service life. Wider industrial use will require testing within those constraints.
The funding will support expansion of admixture manufacturing and further scaled trials with industrial partners. Concretene is also developing a programme referred to as Manchester graphene, which would use biogas derived from local wastewater systems as a feedstock for graphene production. United Utilities has been identified as a relevant potential source of that material. The company describes an ambition for multi-tonne output and a carbon-negative production route, claims that require lifecycle evidence when implemented at commercial scale.
The investment follows earlier backing from venture investors and links to engineering expertise, including support from Arup. Access to technical partners is significant because construction products must move from laboratory tests into processes that are routine for batching plants and contractors. A useful additive must be consistent, available in sufficient quantity and compatible with established production and quality-control arrangements. Any change that introduces extra complexity or raises costs can hinder adoption regardless of attractive laboratory results.
Graphene production and low-carbon concrete both have established research communities in Manchester, giving the spinout proximity to scientific expertise and potential industrial collaborators. The financing involves a mixture of public-backed investment capacity and private venture capital, a model often used to support capital-intensive technologies that require more development before achieving meaningful production revenue. Concretene’s challenge now is to convert technical potential and trial results into repeatable supply contracts and verified environmental performance.
The nature of the funding round also requires careful interpretation. The £4.5m is the first close of a Series A, not necessarily the final amount the company will raise under that programme. Investors will be assessing whether industrial-scale production can preserve the technical performance achieved in earlier trials and whether costs remain competitive with conventional admixtures. The construction industry tends to qualify materials conservatively because long-term structural performance and liability matter. Independent verification of embodied carbon and durability will be important if the business hopes to sell on environmental as well as engineering advantages. The proposed wastewater-biogas feedstock adds a second industrial-scale process that must also be demonstrated.
The initial Series A close is not evidence that all planned industrial facilities are complete or that the company’s intended carbon reductions have already been achieved across construction projects. It provides capital for the next phase of scale-up, manufacturing validation and commercial engagement. The outputs that matter will be the consistency of production, acceptance by concrete users and demonstrated whole-life environmental outcomes under real construction conditions.
You must be logged in to post a comment.