Displaying items by tag: Department of Transportation
US fully adopts portland-limestone cement
04 April 2024US: The Portland Cement Association (PCA) has commended the Connecticut Department of Transportation's approval of Portland-limestone cement (PLC), marking its acceptance in all US states and the District of Columbia. PLC, with increased limestone content, maintains traditional portland cement's efficacy but reduces CO₂ emissions by up to 10%. The US avoided more than 4Mt of CO₂ emissions in 2023 by using PLC and other blended cements. This achievement coincides with growing cement consumption by state transportation departments, fuelled by the Bipartisan Infrastructure Law.
Mike Ireland, president and CEO of PCA, said "This milestone is a huge step forward for sustainable American construction. Switching to PLC promises to save millions of tonnes of CO₂. Using a lower-emission product that meets all the performance requirements of traditional cement means the construction sector can build with durability, safety and sustainability in mind."
US: The Department of Transportation has announced a US$5m initiative to investigate the use of steel slag in cement and concrete. This will take the form of a collaboration between the Department of Transportation and a selected US-based steel producer and university partner. The initiative seeks to reduce CO2 emissions in the production of building materials. Prospective participants may view the grant opportunity here.
Transport secretary Pete Buttigieg said "We're proud to make this funding available to help develop the next generation of construction materials so that the future of our transport infrastructure is more resilient, more sustainable and made in America.”
Robert Hampshire, deputy assistant secretary for research and technology and chief science officer, said “This funding initiative will develop and advance innovative materials and technologies that support the nation’s goals to decarbonise the transportation sector by 2050, strengthen resilience of the nation’s transportation infrastructure, and address adverse environmental impacts created by the transportation system.”
US: Martin Marietta Materials recorded revenues of US$4.68bn throughout the first nine months of 2022, up by 20% year-on-year from US$3.92bn. Cement sales contributed US$455m, 9.7% of total revenues, up by 27% from US$358m. Cost of revenues rose by 4% for the group, to US$3.62bn from US$2.92bn. Nonetheless, Martin Marietta Materials successfully recorded nine-month net earnings growth of 25% year-on-year, to US$638m from US$546m.
Chair and CEO Ward Nye said that double-digit price growth drove the company's record profitability. He said "Importantly, we expect a return to expanding margins in the fourth quarter of 2022, as the compounding effect of multiple pricing actions throughout the year offsets continued inflationary pressure and a slowdown in single-family residential construction. Martin Marietta's strategic coast-to-coast footprint is well positioned for long-term growth, driven by favourable population migration trends, housing shortages in our markets and a long-term federal highway bill complemented by healthy Department of Transportation budgets in the company's key states. Near-term, we expect affordability-driven headwinds in the single-family residential end market will be offset by a significant acceleration in public infrastructure investment and continued strength in large-scale energy, domestic manufacturing and multi-family residential projects."
US: Hawaii’s Department of Transportation plans to use carbon-injected concrete for its new projects. This will include a new structure to protect a highway tunnel from rockfalls, according to Reuters. The Department of Transportation was testing CO2-injected concrete on an access road project with CarbonCure Technologies in May 2019. The latest decision follows a resolution by state legislators that city administrators ‘consider’ using CO2-injected concrete in city and county infrastructure where concrete is used.
In late June 2019 CarbonCure announced that its had formed a partnership with HC&D Ready Mix, a local concrete producer, to use its CO2-injected concrete process. It is the second deal with a concrete producer in the state that CarbonCure has arranged.