Concrete is the most globally used material after water, but it comes with a significant carbon cost. Dr Natasha Boulding and her team are tackling this with OSTO, a carbon-negative lightweight aggregate made primarily from plastic waste that would otherwise be incinerated, releasing large quantities of greenhouses gases. By using OSTO, the production of traditional, carbonintensive concrete blocks can be made carbon neutral, reducing global carbon emissions.
Natasha and her team work directly with concrete manufacturers on an individual basis to develop a unique concrete mix design that is compatible with their existing manufacturing processes. They aim to produce OSTO commercially later this year, and in the long term they hope to create an entire portfolio of product-based solutions for the building materials sector.