Displaying items by tag: Colorado

US: Eagle Materials will modernise and expand its Laramie, Wyoming cement plant, increasing its capacity by 50% to approximately 1.2Mt/yr. The expansion includes a new cement distribution facility in northern Colorado. This project aims to cut manufacturing costs by about 25%, generated by the replacement of traditional fuels with lower cost alternative fuels and natural gas, as well as improved operating efficiency. This upgrade will also reduce CO₂ intensity by nearly 20%, according to the company. The US$430m investment also includes upgrading the existing plant, which became operational in 1927 and currently has a capacity of 800,000t/yr. Construction is set to begin immediately, with completion expected in the second half of 2026.

US: Boulder County has initiated action to terminate the operating licence of the Cemex cement plant near Lyons, Colorado, citing improper expansion of use. Dale Case, director of Boulder County Community Planning and Permitting, sent a notice to the company, motivated by a ‘significant’ rise in traffic. The letter said that the increased traffic created a need for new traffic construction and infrastructure, and requires a new access permit from the Colorado Department of Transportation (CDOT).

The plant has been operational since 1965, but faced changes in 1994 when Boulder County amended its land use code, necessitating special use approval for open mining at the Dowe Flats Quarry. The special use approval for the quarry expired on 30 September 2022, leading to termination of all mining operations and multiple complaints alleging the cement plant's non-compliance with county code and traffic congestion. A CDOT study revealed an increase in truck traffic since the quarry's closure, with daily trips increasing by 50% year-on-year.

Cemex now has a 30-day window to contest the director's determination, reduce plant use, or appeal to the Boulder County Board of Commissioners. The plant will continue operating under existing conditions until a final decision is reached.

US: Terra CO₂ has entered into an exclusive agreement with Eagle Materials, under which the cement producer will set up plants to produce Terra CO₂’s supplementary cementitious materials (SCM) in three cities, including Greater Denver in Colorado. Terra CO2's SCM consists of ground, heated glass spheres made from silicate-containing igneous rocks and sediments, which can be used in cement production to lower CO₂ emissions by 70% compared to ordinary Portland cement (OPC).

Terra CO₂'s chief executive officer Bill Yearsley said “New climate tech needs to be deployed quickly to meet 2030 and 2050 climate goals. Terra is working hard to accelerate the deployment of its commercial plants through strategic partnerships, deploying more capital and shortening timelines. We are thrilled to work with a partner like Eagle Materials to build commercial plants for sustainable construction, and act on this urgency through our shared commitment to action. In the absence of a 'climate tech express lane' from the government, working with industry leaders is key to innovating and expediting low-carbon solutions for the industry."

Last week the US General Services Administration (GSA) announced that it was investing US$2bn on over 150 construction projects that use low-embodied carbon (LEC) materials. The funding is intended to support the use of US-manufactured low carbon asphalt, concrete, glass and steel as part of the Inflation Reduction Act. For readers who don’t know, the GSA manages federal government property and provides contracting options for government agencies. As part of this new message, it will spend US$767m on LEC concrete on federal government buildings projects following a pilot that started in May 2023. The full list of the projects can be found here.

This is relevant because the US-based ready-mixed concrete (RMX) market has been valued roughly at around US$60bn/yr. One estimate of how much the US federal government spent on concrete was around US$5bn in 2018. So the government buys a significant minority of RMX in the country, and if it starts specifying LEC products, this will affect the industry. And, at present at least, a key ingredient of all that concrete is cement.

This isn’t the first time that legislators in the US have specified LEC concrete. In 2019 Marin County in California introduced what it said was the world’s first building code that attempted to minimise carbon emissions from concrete production. It did this by setting maximum ordinary Portland cement (OPC) and embodied carbon levels and offering several ways suppliers can achieve this, including increasing the use of supplementary cementitious materials (SCM), using admixtures, optimising concrete mixtures and so on. Unlike the GSA’s approach in November 2023 though, this applies to all plain and reinforced concrete installed in the area, not just a portion of procured concrete via a government agency. Other similar regional schemes in the US include limits on embodied carbon levels in RMX in Denver, Colorado, and a reduction in the cement used in RMX in Berkeley, California. Environmental services company Tangible compiled a wider list of embodied carbon building codes in North America that can be viewed here. This grouping also includes the use of building intensity policies, whole building life cycle assessments (LCA), environmental product declarations (EPD), demolition and deconstruction directives, tax incentives and building reuse plans.

Government-backed procurement codes promoting or requiring the use of LEC building materials for infrastructure projects have been around for a while in various places. The general trend has been to start with measurement via tools such as LCAs and EPDs, move on to government procurement and then start setting embodied carbon limits for buildings. In the US the GSA’s latest pronouncement follows on from the Federal Buy Clean Initiative and from when California introduced its Buy Clean California Act in 2017. Outside of the US similar programmes have been introduced in countries including Canada, Germany, the Netherlands, Sweden and the UK. On the corporate side members of the World Economic Forum’s First Movers’ Coalition have committed to purchasing or specifying volumes of LEC cement and/or concrete by 2030. Examples of whole countries actually setting embodied carbon emissions limits for non-government buildings are rarer, but some are emerging. Both France and Sweden, for example, introduced laws in 2022 that start by analysing life-cycle emissions of buildings and will move on to setting embodied carbon limits in the late 2020s. Denmark, Finland and New Zealand are also in the process of introducing similar schemes. The next big move could be in the EU, where legislators are considering embodied carbon limits for building materials as part of its ongoing revisions to its Energy Performance of Buildings Directive or the Construction Products Regulation legislations. Lobbying, debate and arguing remains ongoing at present.

To finish, Ireland-based Ecocem spent a period in the 2010s attempting to build a slag cement grinding plant at Vallejo, Solano County, in the San Francisco Bay Area of California. The project met with considerable local opposition on environmental grounds and was eventually refused planning permission. The irony is that slag cement is one of those SCM-style cements that Marin County, also in the San Francisco Bay Area, started encouraging the use of just a few years later. Ecocem held its inaugural science symposium in Paris this week. A number of scientists who attended the event called for existing low carbon technologies to be adopted by the cement and concrete sectors as fast as possible. One such approach is to lower the clinker factor in cement through the use of products that Ecocem and other companies sell. A point to consider is, if Marin County’s code or the GSA’s recent procurement directive came earlier, then that slag plant in Vallejo might have been built. Encouraging the use of LEC building materials by governments looks set to proliferate but it may not be a straightforward process. Clear and consistent policies will be key.

Taiwan Cement has just commissioned a 107MWh energy storage project at its Yingde plant in Guangdong province, China. Subsidiary NHOA Energy worked on the installation and has been promoting it this week. The battery storage works in conjunction with a 42MW waste heat recovery (WHR) unit, a 8MWp solar photovoltaic unit and a proprietary energy management system. It is expected to store about 46,000MWh/yr of electricity and save just under US$3m/yr in electricity costs.

NHOA Energy, formerly known as Engie EPS before Taiwan Cement bought a majority stake in it, claims it is one of the largest industrial microgrids in the world. We can’t verify this for sure, but it is definitely large. For comparison, the 750MW Vistra Moss Landing Energy Storage Facility in California often gets cited as the largest such facility in the world. This is run by a power company, as are many other large battery energy storage systems. In its annual report for 2022 Taiwan Cement said it was planning to using NHOA’s technology to build seven other large-scale energy storage projects at sites in Taiwan including its integrated Suao, Ho-Ping and Hualien cement plants.

The aim here appears to be supplying renewable electricity to the national grid in Taiwan. Taiwan Cement is diversifying away from cement production, with an aim to derive over 50% of its revenues from other activities besides cement by 2025. In 2022 cement and concrete represented 68% of its sales, while its electricity and energy division, including power supply and rechargeable lithium-ion batteries, represented 29%. The company is also not using its own batteries at the Yingde plant. Instead it is using lithium iron phosphate batteries supplied by Ningde Times. This is worth noting, as the cement producer’s batteries are used in vehicles.

Global Cement regularly reports news stories on cement plants that are building photovoltaic solar power arrays. However, so far at least, energy storage projects at scale have been rarer. One earlier example of an energy storage system loosely associated with a cement plant includes the now decommissioned Tehachapi Energy Storage Project that was situated next to the Tehachapi cement plant in California. That project tested using lithium ion batteries to improve grid performance and integrate intermittent generation from nearby wind farms. It is also worth noting that Sumitomo Osaka Cement’s sister company Sumitomo Electric is one of the world’s larger manufacturers of flow batteries, although no installation at a cement plant appears to have happened yet. In simple terms, flow batteries are an alternative to lithium ion batteries that don’t store as much energy but last longer.

More recently, Lucky Cement in Pakistan started commercial operation of a 34MW solar power plant with a 5.59MWh energy storage unit at its Pezu plant in Khyber Pakhtunkhwa in late 2022. Reon Energy provided the equipment including a lithium-ion based battery approach to the storage. Then, in March 2023, Holcim US said that it was working with TotalEnergies to build solar power capacity and a battery energy storage unit at the Florence cement plant in Colorado. TotalEnergies will install, maintain and operate a 33MW DC ground-mounted solar array and a 38.5MWh battery energy storage system at the site. Operation of the renewable energy system is expected to start in 2025.

Away from electrical batteries, the other approach to energy storage at cement plants that has received attention recently from several quite different companies has been thermal batteries. The two prominent groups using them at different scales are Rondo Energy and Synhelion. The former company has developed its Heat Battery technology, which uses refractory bricks to absorb intermittent renewable energy and then supply the energy back as a steady stream of hot gas for use in a cement plant mill, dryer, calciner or kiln. Both Siam Cement Group (SCG) and Titan Cement have invested in Rondo Energy. In July 2023 SCG and Rondo Energy said that they were planning to expand the production capacity of a heat battery storage unit at a SCG plant to 90GWh/yr. Synhelion, meanwhile, has been working with Cemex on using concentrated solar power to manufacture clinker. It achieved this on an ‘industrially viable scale’ in August 2023. It has since been reported that the companies are working on building a small scale industrial plant at Móstoles near Madrid by 2026. Crucially for this discussion though, the process also uses a thermal energy storage unit filled with ceramic refractory material to allow thermal energy to be released at night, and thus ensure continuous operation.

The examples above demonstrate that some cement companies are actively testing out storing energy at scale. Whilst this will not solve the cement sector’s process emissions, it does potentially start to make using renewable energy sources more reliable and reduce the variable costs of renewable power. Whether it catches on remains to be seen. Most of these kinds of projects have been run by power companies and that is where it may stay. It is instructive to note that Reon Energy was the only company to state that its battery-based energy storage system has a life-span of 8 - 12 years. Our current vision of a net-zero future points to high electrical usage but it may be shaped by how good the batteries are… from our phones to our cars to our cement plants.

For more information on Rondo Energy read the January 2023 issue of Global Cement Magazine

US: American Fiber Cement Corporation (AFCC) has announced a rebrand to American Fiber Cement. Besides the name change, the producer's new branding will consist of a new logo and brand position, and a website redesign. Additionally, the company's range of former Cembrit brand fibre cement products will be rebranded to include the AFC name.

General manager Donna Anglada said "We are excited to reveal our new branding, but we also want to ensure that our distributors, reps and customers understand that, while the names are changing, we will continue to sell Patina, Patina Inline, Patina Rough, Deco, Solid, Cover and Transparent."

US: Holcim US has appointed TotalEnergies to install, maintain and operate a 33MW solar power plant and 38.5MWh battery system at its Florence, Colorado cement plant. By storing energy with the battery system, the plant can relieve demand on the grid at peak times. Holcim will receive roughly 71,000MWh/yr of renewable energy under a minimum 15-year power purchase and storage services agreement (PPSSA). The partners expect the new systems to reduce the plant's CO₂ emissions by 40,000t/yr and its energy consumption by 40%.

Holcim North America’s vice president for procurement Atl Martinez said "As we work to accelerate green growth across the US, it's critical that we come to the table with partners who share similar goals around circularity and renewable energy. This initiative with TotalEnergies demonstrates an ongoing determination to transform our operations and lower our carbon footprint. It's a milestone investment that will decrease our reliance on other sources of energy and shrink our utility costs through a powerful combination of clean energy and efficient operations."

US: The Environmental Protection Agency (EPA) has announced that 10 cements plants have received its Energy Star certification in 2022 from a total of 86 manufacturing plants across all industries. The certification is awarded to the top 25% performers in energy efficiency in each sector. The EPA cited examples of how Titan America’s Troutville plant in Virginia and its Medley plant in Florida had converted production to Portland Limestone Cement (PLC), and achieved a 12% reduction in electricity use and an 18% reduction in CO2 emissions, respectively, thanks to improved energy management. It also mentioned Cemex’s Miami plant in Florida, which increased its energy performance in 2022 by modifying a finish mill, optimising the ball charge on the largest mill and identifying and correcting potential energy losses while also increasing the production of PLC.

Cement plants awarded the Energy Star certification in 2022 include: Drake Cement’s Paulden plant and Salt River Materials Group’ Clarkdale plant in Arizona; GCC’s Pueblo plant in Colorado, Cemex’s Miami plant and Titan America’s Medley plant in Florida; Argos USA’s Harleyville plant in South Carolina; GCC’s Rapid City plant in South Dakota; Buzzi Unicem USA’s Chattanooga plant in Tennessee; Titan America’s Troutville plant in Virginia; and Ash Grove Cement’s Seattle plant in Washington.

US: CRH-subsidiary Ash Grove Cement has appointed Fernando Valencia as Vice President of Manufacturing – Central Ashgrove. He previously worked as a plant manager at LafargeHolcim’s Ste Genevieve plant in Missouri and the Portland Plant at Florence in Colorado. Prior to this he was the plant manager of Holcim US’ Hagerstown Plant in Maryland and also worked as a commissioning manager. Valencia holds a degree in mechanical engineering from the Anahuac University Network and a master’s degree in business administration from the University of Missouri - St Louis.

US: A team from the University of Colorado Boulder (UCB) has developed a carbon-neutral alternative cement from biogenic limestone. The limestone comes from farmed cocolitophores, which capture CO₂ as they grow.

The UCB scientists collaborated with colleagues from the University of Carolina at Wilmington and the National Renewable Energy Laboratory on the project. Their work has received US$3.2m in US Department of Energy funding.

This news story has been corrected to include the correct name of the University of Colorado Boulder