Displaying items by tag: Tarmac
UK: Tarmac will utilise River Logic's Digital Planning Twin™ for enhanced supply chain capabilities in its cement division.
Jim Dutton, cement supply chain planning manager at Tarmac, said "We're pleased to have commissioned River Logic as a partner to work with our cement business in the UK. Working with River Logic means we have further support to simplify, connect, and optimise our supply chain efforts. With this third-generation system, we can look at CO2 emissions data in addition to supply and demand information which supports our planning."
Tarmac digitises its rail logistics with Everysens
15 January 2024UK: CRH subsidiary Tarmac has successfully deployed France-based software developer Everysens’ Transport Visibility & Management System (TVMS) in its total operations processing system (TOPS) for rail transport. The TVMS digitally tracks trains, enabling the customer to measure performance, analyse patterns and ensure smooth anticipation and collaboration between stakeholders. Tarmac expects the upgrade to streamline its delivery monitoring and also allow for proactive decision-making.
Tarmac head of rail Chris Swan said "Everysens' integration with TOPS has significantly supported Tarmac to digitise its rail freight operations. Tracking our freight trains has become a lot easier and more precise through digital solutions. With real-time ETA data, we can optimise routes, manage resources, and provide an even higher level of service to our customers. This integration underscores our commitment to staying ahead in technology and embracing digitisation for more efficient and streamlined operations."
Tarmac and Cambridge Electric Cement participate in trial melt of Cement 2 Zero carbon neutral cement project
03 October 2023UK: The Cement 2 Zero project has successfully concluded its first trial melt of recovered cement paste in an electric arc furnace at the Materials Processing Institute’s Teesside campus. The project uses the paste as flux for electric steel recycling. Cambridge Electric Cement (CEC) has demonstrated that the ‘slag’ from this process can be ground into fine clinker that, when mixed with gypsum and supplementary cementitious materials (SCMs), produces net zero CO2 cement. The Cement 2 Zero project to produce CEC’s cement at an industrial scale launched in March 2023, with US$7.85m in funding from UK Research and Innovation. Tarmac will grind the clinker from the project’s trial melts for testing in order to obtain certification and specification as a usable cement product.
UK: A court has fined CRH subsidiary Tarmac US$516,000 for failing to ensure the provision of moveable guards fitted to an interlocking device connected to a rotary mill at its Dunbar cement plant between January 2019 and April 2021. The East Lothian Courier newspaper has reported that the failure resulted in a worker’s loss of fingers after he came into contact with the unit’s rotary valve on 30 April 2021. The producer has until 20 September 2023 to pay the fine.
UK: Aggregate Industries, Breedon, Lhoist and Tarmac have announced the launch of the Peak Cluster, a carbon capture and storage cluster of cement and lime plants. The partners aim to eliminate 3Mt/yr of emissions from operations across their plants in Cheshire, Derbyshire and Staffordshire by capturing 100% of their CO2 emissions. Progressive Energy will oversee the capture and transportation of CO2 from the plants for storage below the Irish Sea. Possible storage partners for the cluster are Liverpool Bay CCS or the upcoming Morecambe Net Zero storage project. When operational, the Peak Cluster will eliminate 40% of emissions from UK cement and lime production. Participating cement plants are Aggregate Industries' 1Mt/yr Cauldon cement plant in Staffordshire, Breedon's 1.5Mt/yr Hope plant in Derbyshire and Tarmac's 0.8Mt/yr Tunstead plant in Derbyshire.
Mineral Products Association (MPA) energy and climate change director Diana Casey said “The launch of the Peak Cluster is an exciting and vital step forward in the journey of the cement and lime sectors towards net zero. The region is a historic heartland for cement and lime production providing highly skilled jobs for local communities, and a secure supply of essential materials to the UK economy." She concluded "The UK Concrete and Cement Industry Roadmap to Beyond Net Zero highlighted the importance of carbon capture for the decarbonisation of the cement and concrete supply chain, and the Peak Cluster is an essential part of that transition. This launch demonstrates the commitment of cement and lime producers to transition to net zero to secure the future of these important industries, and the vital products they produce, in a net zero world.”
Update on recycled concrete paste, February 2023
08 February 2023Cement 2 Zero (C2Z) has officially launched in the UK this week. The project is an industrial scale pilot of the Cambridge Electric Cement (CEC) process. The Materials Processing Institute will lead on this stage with two-year funding of around Euro7m provided by UK Research and Innovation (UKRI). Partners include the University of Cambridge, Atkins, Balfour Beatty, Brewster Brothers, Celsa Group, Day Aggregates and Tarmac.
CEC’s method uses recycled concrete paste in place of lime-flux in steel recycling. Slag is formed as the steel melts and this is then used in place of clinker to make more cement. This way of making cement cuts out the decarbonisation of limestone step from conventional clinker production. If renewably-sourced electricity is used to power the heating and grinding parts of manufacture, then cement production in this way could potentially cut out most of its CO2 emissions. The first phase of trial melts by C2Z will be conducted by the Materials Processing Institute using a 250kg induction furnace and this will be scaled up to 6t in an electric arc furnace (EAF). Later, industrial scale melts will be tested in Celsa Steel's EAF in Cardiff, Wales.
CEC is taking a similar approach to HeidelbergCement with its research into using recycled concrete paste. However, HeidelbergCement says it is using the paste to help capture CO2 in an enforced carbonation step it is testing at cement plants. It too though wants to create a secondary cementitious material (SCM) afterwards. There are also links here to construction and demolition waste and electric cement kilns as covered by Global Cement Weekly previously. The latter is different with regards to what CEC is doing because it is recycling concrete waste to produce an SCM (slag) rather than using an electrically powered kiln to make clinker from limestone. Coolbrook, VTT and the like have had to build electric kilns effectively from scratch or adapt technology from elsewhere for their approaches whilst CEC appears to be about to use existing EAFs in its industrial scale pilot.
Figure 1: Projection of how the Cambridge Electric Cement production process could be used at scale in the UK. Source: UK FIRES. Click to view larger version.
CEC’s forecast of how its process could be used at scale in the UK can be seen above in Figure 1. If the majority of the country’s steel scrap was recycled in this fashion each year then 2.4Mt/yr of CEC cement could be produced. This would represent a quarter of the c10Mt of cement sales reported by the MPA in 2021. Assuming the EAFs were powered by renewables then this could reduce the cement sector’s CO2 emissions significantly. Although it would still leave the industry looking for other decarbonisation routes for the other three-quarters of cement demand.
C2Z and CEC offer a novel spin on cement production by recycling concrete waste, using an electrical heating step and dodging the process emissions associated with normal ordinary Portland cement (OPC) clinker production. If it did progress to a commercial stage then it would see a continued relationship between steel and cement producers. Currently this is mainly centered around iron and steel slag usage as a SCM. One point of interest here would be how much higher levels of steel recycling and a process like CEC being used regularly would affect existing slag usage as an SCM. It doesn’t look like CEC could solve the cement sector’s CO2 emission problem all on its own but it could certainly make a difference if it progressed to a commercial stage. As ever with cement sector decarbonisation there appear to be a range of options available to producers.
UK: Tarmac has appointed Craig Kirkland as the plant manager of Tarmac’s integrated Dunbar plant in Scotland. Kirkland first started working for the subsidiary of Ireland-based CRH in the mid-1990s as its Landfill & Recycling Manager. He later became its Commercial Manager in 2015 before becoming the Head of Transformation at the Dunbar plant in 2021.
Tarmac’s Tunstead lime kiln uses hydrogen fuel
01 July 2022UK: Tarmac has successfully produced lime at its Tunstead, Derbyshire, plant using net zero hydrogen to fuel its kiln. The achievement was the culmination of a series of trials substituting various proportions of hydrogen for natural gas.
Tarmac’s lime director Graham Cooper said “Lime has been manufactured in the Peak District for centuries and this forward-thinking project aims to ensure the future of this nationally significant industry as the UK transitions to net zero.”
UK: Tarmac has supplied its Toptint Glow glow-in-the-dark concrete for a major mixed-use commercial development called The Glass Yard in Chesterfield, Derbyshire. Construction company Blue Deer used Toptint Glow in the main walkways and first-floor balconies of the office, restaurant and retail complex. France-based Chryso supplied its Lumintech glow-in-the-dark chippings for use in the concrete. The supplier said that the chippings are fully recycled. They are available in white, stone, light grey, agate and jade to match the colour of the concrete mix. Each has a corresponding glow colour of blue, green turquoise or blue turquoise. Tarmac says that glow-in-the-dark concrete helps to enhance the nighttime built environment.
Product development manager Glanville Norman said “Tarmac is always looking to develop new and exciting materials that can complement bold design. This is the first time that Toptint Glow has been used on a major commercial development and we were delighted to be able to propose a solution that not only has high aesthetic and environmental quality but also helped to improve safety and visibility.”
In the two and a half years since Calix brought together cement producers across corporate and national boundaries to form the first Low Emissions Intensity Lime And Cement (LEILAC-1) consortium and commissioned a carbon capture installation at the Lixhe cement plant in Belgium on 10 May 2019, carbon capture and storage (CCS) has passed some major milestones. New installations have made Global Cement headlines from Canada (at Lehigh Cement’s Edmonton plant in November 2019) to China (at a China National Building Material (CNBM) plant in July 2021). Twelve other European cement plants now host current or planned carbon capture trials – including the first full-scale system, at HeidelbergCement’sBrevik plant in Norway. A second Calix-led project in Germany, LEILAC-2, attracted Euro16m-worth of funding from the European Union in April 2020.
The work of LEILAC-1 – backed by HeidelbergCement, Cemex, Lhoist, Tarmac and others, with Euro12m in funding – set the benchmark in innovation. Its pilot plant successfully captured 100% of 'unavoidable' process emissions by indirectly heating raw materials inside a vertical steel tube. Called direct capture, the model removes a CO2 separation step, as our subsequent price analysis will reflect.
1) Both limestone and raw meal may be processed;
2) CO2 is successfully separated;
3) The energy penalty for indirect calcination is not higher than for conventional direct calcination.
Additionally, Calix’s first departure into the cement sector has demonstrated that its model exhibits no operational deterioration, does not suffer from material build-up and has no impact on the host plant when used in cement production. The plant’s clinker capacity remained the same as before the trial. Most importantly of all, the Lixhe cement plant recorded no process safety incidents throughout the duration of the trial.
The study has also put an evidence-based price tag on industrial-scale CCS at a cement plant for the first time: Euro36.84/t. Figure 1 (below) plots the full-cycle costs of three different carbon capture installations at retrofitted 1Mt/yr cement plants using 100% RDF, including projections for transport and storage. Installation 1 is an amine-based carbon capture system of the kind installed in the Brevik cement plant’s exhaust stack; Installation 2 is the Calix direct capture system and Installation 3 consists of both systems in combination. Direct capture’s costs are the lowest, while the amine retrofit and the combination installation are close behind at Euro43.68/t and Euro43.25/t respectively.
Figure 1: Full-cycle costs of three different carbon capture installations at retrofitted 1Mt/yr cement plants using 100% RDF
Installations 1 and 3 both entail additional energy requirements for the separation of CO2 from flue gases and air. With the inclusion of the CO2 produced thereby, the cost of Installation 1 rises to Euro94/t of net CO2 emissions eliminated, more than double that of Installation 2 at Euro38.21/t. The combination of the two in Installation 3 costs Euro67.3/t, 76% more than direct capture alone. Figure 2 (below), breaks down the carbon avoidance costs for each one and compares them.
Figure 2: Carbon avoidance costs of three different carbon capture installations at retrofitted 1Mt/yr cement plants using 100% RDF
The Global Cement and Concrete Association (GCCA)’s seven-point Roadmap to Net Zero strategy puts CCS at the forefront of concrete sector decarbonisation. CCS is expected to eliminate an increasing share of global concrete’s CO2 emissions, rising to 36% in 2050 – by then 1.37Bnt of a total 3.81Bnt. This will depend on affordability. Calix’s model has reduced the capital expenditure (CAPEX) of a carbon capture retrofit by 72% to Euro34m from Euro98m for the amine-based equivalent. When built as part of a new plant, the CAPEX further lowers to Euro27m. Both models may also be retrofitted together, for Euro99m. In future, Calix expects to install direct capture systems capable ofachieving Euro22/t of captured CO2. By contrast, the cost of emitting 1t of CO2 in the EU on 11 October 2021 was Euro59.15.
In what it calls the Decade to Deliver, the GCCA aims to achieve a 25% CO2 emissions reduction in global concrete production between 2020 and 2030, in which CCS plays only a minor part of less than 5%. LEILAC-1 presents a visionof affordable carbon avoidance which complements cement companies’ 2030 CO2 reduction aspirations.
Unlike conventional CCS methods, however, direct capture only does two thirds of a job – eliminating the emissions of calcination, but not combustion. This would appear to make it unsuited to cement’s longer-term aim of carbon neutrality by 2050 in line with the Paris Climate Accords’ 2°C warming scenario. On the other hand, direct capture is not designed to work alone. Calix recommends use of the technology in conjunction with a decarbonised fuel stream to eliminate the plant’s remaining direct emissions. This increases the price - by 47% to Euro56.05/t of CO2 avoided for biomassand by more than double to Euro104.48/t for an E-kiln.
The Lixhe cement plant’s carbon capture story is one of a successful crossover from one industry into another: Calix previously applied the technology in the Australian magnesite sector. Realisation of the Calix carbon capture vision in the global cement industry is a challenge primarily due to the scale of the task. It will require continued collaboration between companies and with partners outside of the industry. Further than this, parliaments must continue to enact legislation to make emission mitigation the economic choice for producers.