Displaying items by tag: Bricks

UK: LKAB Minerals and Forterra have partnered to produce recycled calcined clay from unwanted bricks as a traditional cement replacement, with production set to begin at LKAB’s Flixborough plant in Scunthorpe in June 2025. The material is made by crushing bricks sourced from Forterra’s Kings Dyke site in Peterborough.

LKAB Minerals UK managing director Steve Handscomb said “The traditional manufacturing and materials industries have to work harder than other less energy intensive industries, and need significant investments to upgrade equipment. We are committed to playing a role in the transition. In fact, we are already a significant producer of GGBS, and in our minerals division, 45% of the minerals we sell are from recycled sources or by-products.”

Qatar: The Ministry of Environment and Climate Change has organised a symposium to launch a new ‘green’ cement made from sewage waste, with aims to support environmental sustainability and the circular economy in line with the Qatar National Vision 2030. The symposium highlighted the role of scientific research in transforming sewage into green cement. The cement is produced by treating sludge, resulting from solid sewage waste by burning, grinding and mixing it with catalysts, then is practically applied in the manufacture of building blocks and foam concrete. The amount of accumulated sewage waste is estimated at about 40,000t/yr, which can be used to produce 40 million bricks or 150,000m³/yr of foam concrete.

UK: A new study by the Mineral Products Association (MPA), supported by Innovate UK, has found that incorporating reclaimed clays and finely ground brick powder into cement production can reportedly lower the embodied CO₂ by up to 3%. The materials are used as calcined clay in the cement production process. The project aims to offer a viable alternative to fly ash and ground granulated blast-furnace slag, as resources diminish due to the steel industry's decarbonisation efforts.

MPA director Diana Casey said "Using discarded bricks and reclaimed clays will not only lower carbon and reduce the amount of materials sent to landfill but has the potential to create a whole new market if these clays become widely used in the construction industry, helping to retain economic value in the UK, secure jobs and attract investment."

China: Huaxin Cement and Hunan University have started a pilot production line that uses flue gas from a cement production line to manufacture concrete bricks. The process, being tested at the Huaxin Wuxue Industrial Park in Hubei Province, absorbs CO₂ from the flue gas and uses the heat of the gas to cure the bricks, according to the Xinhua News Agency. The average compressive strength of the bricks is above 15MPa. It is estimated that a production line with a brick output of 100m/yr could absorb 26,000t/yr of CO₂.