Displaying items by tag: curing

US: Premier Concrete Products is expanding its Livingston Parish concrete plant in Louisiana with the construction of a new concrete pipes production unit. The company plans to invest US$10m in the line. It will employ 33 workers when operational later in 2024. It will be equipped with an automated concrete batching system, ‘high-level’ curing equipment and overhead cranes.

President Cody Colvin said “We are excited about the partnership we have with the Livingston Parish community.” He added, “This expansion will add jobs and will serve to satisfy a shortage of precast concrete infrastructure that currently exists in Louisiana and the Southern US. We are very excited to work with Livingston Parish President Randy Delatte and the whole Livingston community.”

Canada: Canal Block will begin to produce CarbiCrete's cement-free concrete products under licence from 2025. The partners say that they have installed a new curing system for the purpose at Canal Block’s Port Colborne plant. Innovation cluster NGen awarded them US$4.04m in funding for the project.

Canal Block president Durk Bylsma said "We look forward to offering a carbon-negative masonry unit to Ontario's construction market in 2025.”

CEO Jacob Homiller said "We are tremendously pleased to bring our cement-free concrete technology to Ontario through Canal Block."

Canada: Carbon-negative concrete producer CarbiCrete has signed a deal with Holcim subsidiary Lafarge Canada. Under the deal, Lafarge Canada will process steel slag at its St. Constant cement plant in Québec for use as an ingredient in CarbiCrete’s CO₂-cured cement-free concrete.

CarbiCrete partner Patio Drummond produces carbon-negative concrete blocks using CarbiCrete’s technology at its Drummondville concrete block plant in Québec. The company is on a drive to double the production of CarbiCrete blocks. It first partnered with CarbiCrete during trial production of its material in 2018.

Lafarge Canada vice-president of cement Andrew Stewart said “We are committed to reducing our environmental footprint and leading the way in sustainable construction. Our partnership with CarbiCrete is a testament to our dedication to offering sustainable solutions and actively participating in the circular economy.”

CarbiCrete CEO Chris Stern said “Collaborating with Lafarge allows us to leverage long-established infrastructure and years of expertise in processing steel-related by-products. This enables us to make an immediate climate impact as we scale the deployment of our technology which reduces embodied carbon in concrete by both avoiding emissions and removing carbon through mineralisation.” Regarding the on-going scale-up of production at Patio Drummond’s Drummondville plant, Stern said “Increased production of our carbon-negative blocks brings us closer to our common goal of decarbonising production of the world’s most consumed man-made substance.”

US: A team from the Massachusetts Institute of Technology (MIT) has developed a new method to sequester CO₂ in concrete before curing it. The method is based on the addition of bicarbonate of soda, which reacts with cement to produce a calcium carbonate-calcium silicone hydrate composite. The Journal of Engineering has reported that the method adds the benefits of CO₂ mineralisation during production and casting, doubling the mechanical performance of early-stage concrete. It also eliminates the effects of carbonation reactions in cured concrete, which weaken the concrete by lowering its alkalinity, which accelerates the corrosion of rebar. The method has the potential to sequester 15% of CO₂ emissions from cement production.

The team said “The pre-curing capacity of concrete to sequester CO₂ has been largely underestimated and underutilised. Our new discovery could further be combined with other recent innovations in the development of lower carbon footprint concrete admixtures to provide much greener, and even carbon-negative, construction materials.”