Displaying items by tag: CICERO

The Portland Cement Association (PCA) has launched a new website to promote the US cement industry’s progress towards net zero. It’s always interesting to see the different approaches the various associations around the world take in promoting the sector especially in response to mainstream media coverage that has often taken a negative view of cement and concrete. As sustainability thinking has permeated into society the stereotype that cement production releases vast amounts of CO₂ for little gain has been a hard one to shake off. Readers can draw their own conclusions on how well the PCA site works by looking at cementprogress.com.

Make no mistake, the PCA’s new website is a marketing tool designed to bring out some of the points of its carbon zero roadmap to a wider audience. Yet it is refreshing to see a national association website attempting to tell the general public what progress the cement industry is making towards reducing its CO₂ emissions. Unfortunately, it then avoids giving out any data that presents an overview of how it’s all actually going. This may come with time though as the roadmap was only released in late 2021. One number that does stick out on the site is that the PCA uses the Environmental Protection Agency’s (EPA) carbon emissions data to calculate that the manufacture of cement accounts for 1.25% of total CO₂ emissions in the US. This is lower than the global figure of 7% that is often used from the Center for International Climate and Environmental Research - Oslo’s (CICERO) research. Both figures appear to be broadly correct based on the available data.

The real story here is to showcase the wide range of actions the PCA is taking as part of its roadmap. In the cement section, for example, the PCA is rightly able to demonstrate its recent work driving the transition to Portland Limestone Cement (PLC) production in the US. This then leads on to the usual beats of resilient construction, carbonation and a ’whole society’ approach to tackling the decarbonisation of the cement industry with suggestions that everybody from citizens to contractors to policy makers can do.

The wider context is that the big challenge facing cement advocacy groups today is that sustainability is a global issue but that such groups have generally been national or regional for most of their history. The national or regional cement associations have existed for decades serving the local needs of their members. This started to change in 1999 when the Cement Sustainability Initiative (CSI) was created with its global approach to sustainability for the sector with its data gathering and technology roadmaps. In the 2010s global media attention started to focus on the large share of CO₂ emissions the cement industry was emitting as, coincidentally, China became the world’s largest cement producer. Then in the late 2010s the two global cement associations - the Global Cement and Concrete Association (GCCA) and the World Cement Association (WCA) - emerged with the GCCA taking over what the CSI did previously.

One problem that the PCA and the other associations face is that decarbonising the cement and concrete sectors is hard to do, expensive and will take decades. Until, or if, carbon capture is suddenly conjured up at scale, all of this work is inherently seen as boring by much of the media compared to, say. young photogenic environmental activists supergluing themselves to roads. One way to fight back against this is to show progress font-and-centre and to try and take back control of the narrative. This appears to be what the PCA is trying out in a more direct fashion than usual. The risk though is that any action by an industry-backed lobbying group to show off the work it is doing will simply be labelled as greenwashing, whether it’s fair or not. Of course, some environmentalists indulge in their own reverse version of this (industry staining?) to make the powerful but simple argument about the necessity of cutting CO₂ emissions but without taking fully into account or underplaying the scale of the societal changes necessary to do so. Either way, the cement industry and its advocates have an uphill struggle on their hands in the years ahead. This may require fresh thinking about how to win over hearts and minds.

The March 2023 issue of Global Cement Magazine includes an interview with Claude Lorea from the Global Cement & Concrete Association (GCCA)

A trio of slag cement stories have been in the sector news this week with reports from Australia, France and Sri Lanka. Of note from the first two reports is a focus on supplies of slag.

The first concerns Hallett Group’s US$80m supplementary cementitious materials (SCM) project in South Australia. This will see the company process slag and fly ash sourced from sites in the region to manufacture blended cement products and standalone SCMs. These will be principally milled, blended and distributed from a site at Port Augusta. However, an additional distribution site at Port Adelaide is also planned that can both import and export the company’s products in a bid to cut down on supply chain risk, particular for its mining customers. The company says it will replace up to 1.15Mt/yr of cement when fully operational, although initial production looks set to be about a third of this based on local media reports. Commissioning of the Port Adelaide distribution hub is scheduled for May 2023, following by the Whyalla Granulator in January 2024 and the Port Augusta processing plant in June 2024. Pointedly, Hallett Group is explicit about where is plans to source its SCMs from: Nyrstar Port Pirie and, potentially, Liberty GFG.

The second slag-themed story hails from France, where Hoffmann Green Cement has acquired ABC Broyage, which operates a slag grinding plant in North Dordogne. Like the project in Australia above, Hoffmann Green is focused on its supply chain. With this acquisition it will be able to grind its own blast furnace slag instead of buying it. Raw blast furnace slag will be imported via the port of La Rochelle where the company has storage silos. It will then be ground at the former ABC Broyage site and sent on to Hoffmann Green’s H1 and H2 production sites, located at Bournezeau in the Vendée region. Finally it will use it to manufacture its H-UKR and H-IONA cement products. There is no mention of how much the acquisition is costing Hoffman Green. Instead the emphasis, according to company founders Julien Blanchard and David Hoffmann, is very much to, “strengthen our control over our supply and secure our margins in the current highly inflationary context.”

Finally, the week’s third slag-themed cement story is from Sri Lanka, where local media reports that Insee Cement has started producing Portland Composite Cement, using SCMs such as slag, at its Ruhunu grinding plant. This story follows the trend of cement producers around the world switching to greater usage of blended cements, often for sustainability reasons. Unfortunately, political events in Sri Lanka are overshadowing everything else locally, with the president having fled amid social unrest provoked by the ongoing and severe economic crisis. To this end Insee Cement has astutely also donated medical supplies this week to the intensive care unit at the Colombo National Hospital.

These slag stories are important for the cement sector can be demonstrated by a recent update to the Center for International Climate and Environmental Research - Oslo’s (CICERO) research on global CO₂ emissions from cement production. When it published its estimate for 2021 it found that overall emissions were 2.6Bnt in 2021 or just over 7% of the world’s total CO₂ output. What is worse though, is that its data suggests that cement-based emissions have steadily grown year-on-year from 1.2Bnt in 2002. Apart from a dip in 2015 they have kept on rising! This can mostly be attributed to the growth of the Chinese cement industry in the early 2000s suggesting that a tipping point may be reached in the current decade as lowering cement production CO₂ intensity finally kicks in.

Slag and other SCM-based blended cements fit in here as they are one of the ‘easiest’ ways to reduce the clinker factor of cement and concrete and thereby reduce the sector’s CO₂ levels. Hence they keep popping up on the various roadmaps and reports for the cement industry to reach net zero. The flipside of this however is that slag is becoming harder to source as the demand for granulated blast furnace slag increases and less new steel plants get built, especially in North America and Europe. Hence the focus on the supply of slag in the first two news stories above. Blended cements may be the future but getting there will be far from simple.