Displaying items by tag: Portland Limestone Cement

US: Summit Materials has announced that its cement plant in Hannibal, Missouri, has been converted to produce 100% Portland limestone cement (PLC). Since 4 August 2022, the plant has only produced PLC, which has embodied CO₂ emissions around 10% lower than ordinary Portland cement (OPC). The company said that the conversion marked an important step towards reaching its overall 2030 and 2050 decarbonisation targets, which were announced in April 2022.

The Hannibal plant is the company's second conversion to PLC in 2022. It earlier converted Continental Cement's Davenport plant to 100% PLC production in April 2022.

US: National Cement Company of Alabama has reported that the new kiln line at its Ragland cement plant will reduce the plant’s CO₂ emissions by 40%. Its energy consumption will also fall by 30% as a result of the upgrade. The new line includes a 78m-high homogenisation silo, vertical crusher, five-stage preheater and automated clay storage system. AF used in the kiln will include waste tyres, woodchip and sawdust. The new kiln will help in the Ragland cement plant’s transition to 100% Portland limestone cement (PLC) production by 2023, further diminishing its carbon footprint.

Vicat CEO Guy Sidos said "Our ambition is to use AF in all our cement plants around the world. In addition to eliminating fossil fuel energy and replacing it with recycled regional waste, our investments contribute directly to local development. We are proud of the modernisation and transformation of our Ragland site, which was our very first acquisition outside France in 1974."

US: Lehigh Hanson’s Lehigh Cement plant in Union Bridge, Maryland plans to fully switch from Ordinary Portland Cement (OPC) to Portland limestone cement (PLC) production by January 2023. It will manufacture its EcoCemPLC product. The company says that the Union Bridge plant is currently the company’s largest cement plant in North America.

The decision to move to PLC follows similar changes at the company’s Mason City plant in Iowa and three cement plants in Indiana. Lehigh Hanson produced over 2Mt of PLC in 2021 and it says it is set to double this figure in 2022.

US: The Nevada Department of Transportation has approved the use of Portland limestone cement (PLC) for road construction and repairs. The department expects the move to reduce CO₂ emissions by 4000t/yr. It uses 45,000t/yr of cement in its projects. Local press has reported that transport contributed 35% of Nevada’s CO₂ emissions in 2022, making it the largest single source.

US: Buzzi Unicem USA plans to switch from producing Ordinary Portland Cement (OPC) to Portland Limestone Cement (PLC) at all of its plants by the end of 2022. It said that it intends to transition from traditional ASTM C150 type I and II (OPC) cements in favour of ASTM C595 type IL cement (PLC). So far its Cape Girardeau and Festus plants in Missouri, Greencastle plant in Indiana, Maryneal plant in Texas and Pryor plant in Oklahoma have already completed the move to the PLC. The San Antonio plant in Texas will complete its transition in June 2022, the Chattanooga plant in Tennessee will switch its product line by September 2022 and the Stockertown cement plant in Pennsylvania will complete its conversion later in 2022. The company added that its engineers will continue working to increase the limestone content in cement by up to the permitted 15% and develop High Early Limestone cement, along with other new cement products with reduced clinker content.

Mexico: GCC has announced its plan for a 100% Portland limestone cement (PLC) transition of its Samalayuca, Chihuahua, cement plant. The producer says that the plant will complete its transition in July 2022. It said that the move is part of its CO₂ emissions reduction roadmap.

US: The state governments of Arizona, Maryland and Vermont have approved the use of Portland limestone cement (PLC) in public construction projects. The rule changes bring the total number of states in which PLC may be used in this way to 44.

The Portland Cement Association (PCA) has welcomed the decision. The association said "Widespread acceptance of PLC marks a significant step to reducing the carbon footprint of concrete construction and advancing the goals laid out in the PCA Roadmap to Carbon Neutrality."

US: Argos USA has launched its new Portland Limestone Cement (PLC) brand EcoStrong.The company says the its will complete its conversion to 100% EcoStrong PLC cement production across all facilities in 2023.Its Roberta, Alabama cement plant and Atlanta, Georgia grinding plant will transition by mid-2022, while its Newberry, Florida cement plant will transition by October 2022.Argos USA plans to use EcoStrong cement at all of its Eastern US ready-mix concretesites by mid-2022.

Cement technical director Steve Wilcox said“I am excited to be part of Argos’ brand announcement for our PLC Type IL product. EcoStrong PLC encompasses everything we have worked for over the past decade, to offer a high-quality product with lower embodied carbon, which contributes to the ultimate goal of decarbonising across our operations. Our PLC product is engineered to reduce the harmful effects on the environment and perform similar to or better than our ordinaryPortland cement (OPC) Type I/II. EcoStrong PLC empowers our customers, specifiers, architects, and engineers to design and execute their projects with resilience and sustainability.”

US: Holcim US has successfully transitioned its 0.5Mt/yr Joppa, Illinois, cement plant to 100% Portland limestone cement (PLC) production. The plant will produce the company’s OneCem brand PLC. The producer says that the facility supplies cement to customers along the Mississippi from Minneapolis to the Gulf of Mexico and up the Ohio as far as Pittsburgh.

Plant manager Michel Klenk said “As a leader in our industry, it’s our responsibility to build a path for others to follow by setting the bar for product innovation and improvement. OneCem fits the bill as a low-carbon product that allows for sustained performance with lower emissions.”

US: CalPortland has converted production at the 1.3Mt/yr Mojave cement plant in California to its Advancement HS, a Portland limestone cement (PLC) product. The plant will reduce its CO₂ emissions by 10% on a per ton basis. The company said the move supported the Portland Cement Association’s Roadmap to Carbon Neutrality and the industry’s overall efforts to address climate change.