Displaying items by tag: Clinker factor
LafargeHolcim US to convert Midlothian plant to Portland Limestone Cement production
15 September 2021US: LafargeHolcim US says that the integrated 2Mt/yr Midlothian plant in Texas will become the first cement plant in the country to fully convert to Portland Limestone Cement (PLC) production. The unit will switch to producing the company’s OneCem product, a blended cement manufactured with up to 15% of finely ground limestone. The move is intended to help LafargeHolcim US and its customers meet sustainable construction goals and lower carbon emissions.
“This is an important, but not unique, step for us. We were the first to produce OneCem, a PLC product, in one of the fastest-growing metro areas in the country, and fuel our industry’s step towards a zero carbon future,” said Patrick Cleary, senior vice president of sales, LafargeHolcim US Cement.
The company is promoting OneCem as an alternative to Ordinary Portland Cement in terms of concrete workability, set time, durability and strength development. It can be incorporated into a broad spectrum of applications that will support foundational structures. The product is available in the Western and Southern regions of the US and the company plans to ‘rapidly’ expand production.
India: Vedanta Aluminium has expressed interest in a long-term collaborative partnership with a cement producer. The Economic Times newspaper has reported that, in such a partnership, Vedanta would supply the producer with fly ash and bauxite residue with which to produced reduced-CO2 cement. The company said that a cement producer could be its ‘perfect circular economy partner.’
Chief executive officer Rahul Sharma said "We hope the Indian cement producers come forth to work with us on this innovative solution, which is a true win-win scenario for the industry and environment.”
Switzerland: The Swiss cement association Cemsuisse has published Roadmap 2050, a plan for the achievement of net carbon neutrality by 2050. As part of the plan, the association says that Swiss cement producers will launch carbon capture and storage (CCS) installations at their plants from 2030. Individual companies’ plans also involve the reduction of products’ clinker factors and alteration of cement kiln fuel mixes.
Cemsuisse lobbied the government to approve producers’ mining permits in order to prevent an increase in imports from 686,000t in 2020. The figure corresponds to 15% of the nation’s 4.70Mt consumption.
California Nevada Cement Association releases plan for Californian cement industry carbon neutrality by 2045
31 March 2021US: The California Nevada Cement Association (CNCA) has published a plan for the Californian cement industry to meet its target of carbon neutrality by 2045. The plan consists of three pathways, namely: a reduction in process emissions including by alterations to clinker factor and type of additives; an increase in alternative fuel (AF) substitution; and a switch to renewable energy. The association said that the aims are achievable by close stakeholder coordination, constructive public policy engagement and a situational approach based on a flexible portfolio of pathways.
Mexico: Cemex says that the ongoing coronavirus pandemic will not delay its ‘Climate Action Strategy’ that was previously announced in February 2020. The building materials producer has developed a CO2 reduction roadmap to help guide it towards a towards a targeted 35% reduction in net specific CO2 emissions between 1990 and 2030.
The roadmap consists of: reduction of CO2 emissions of clinker through “the production of novel clinkers with lower heat consumption”; use of “alternative decarbonated raw materials”; increased alternative fuel substitution; and increased substitution of clinker with “alternative cementitious materials, using admixtures to enhance strength, and adopting new grinding technologies to improve performance”; in addition to the increased use of renewable energy.
Cemex chief executive officer (CEO) Fernando Gonzalez said, “Climate change is one of the biggest challenges of our time, and we believe that we can continue to address it as a fundamental component of our efforts to recover from the Covid-19 pandemic.”
Cementos Argos enjoys sales and EBITDA boom in 2019
25 February 2020Colombia: In 2019 Grupo Argos subsidiary Cementos Argos’ sales rose by 11% year-on-year to US$2.8bn from US$2.5bn in 2018 and its earnings before interest, taxation, depreciation and amortisation (EBITDA) rose by 14% year-on-year to US$0.5bn from US$0.4bn in 2018. Cement dispatches rose by 0.6% to 16Mt. In the US, its main market, the company sold 6.3Mt of cement, up by 9.5% from 5.8Mt in 2018.
Argos CEO Juan Estaban Calle praised the company’s successes in 2019, such as the completion of its Thermally Activated Clays (TAC) project at its 1.4Mt/yr integrated Cementos Rioclaro plant in Colombia. “This allows for production and distribution of green cement with a greatly reduced clinker factor, 38% lower CO2 emissions and 30% of the energy consumption of ordinary Portland cement (OPC) production,” he said.
Germany: Holcim Deutschland has announced the successful development of Holcim EcoPact Zero, a net-zero carbon concrete. It says that it is in talks with customers in Germany and will make the first deliveries of EcoPact Zero in early 2020. Holcim Deutschland CEO Thorsten Hahn said, “The use of clinker-reduced cements and the optimisation of the binder content play a central role. The still unavoidable CO2-footprint is fully offset at with the support of various certified environmental projects.”
Mexico: A team led by José Iván Escalante Garcíaat at the Saltillo unit of the Center for Research and Advanced Studies of the National Polytechnic Institute (Cinvestav) is researching the use of volcanic ash in making blended cements and concrete. Volcanic ash is being considered to reduce the clinker factor of cement due to its abundance, low cost and its appropriate chemical composition. A clinker substitution factor of up to 80% has been achieved using volcanic ash. The research group has developed 15 alternatives to Ordinary Portland Cement (OPC) using waste or materials or minerals.
Cementa’s Skövde plant working on grinding optimisation project
16 January 2019Sweden: Cementa’s Skövde plant working on project to optimise its grinding process and reduce the clinker factor of the cement it produces. The project is looked at grinding limestone separately as opposed to grinding it with clinker and gypsum, which it currently does. The plant is using a mill it only uses occasionally to grind the limestone to the desired size. A full-scale trial was run in the autumn of 2018. Products from the trial are now being tested at a laboratory.
Cement Sustainability Initiative report shows Indian cement industry meeting 2030 carbon emission targets
03 December 2018India: A report by the Cement Sustainability Initiative (CSI) shows that the local cement sector is on track to meet its 2030 targets from the low carbon technology roadmap (LCTR). Direct CO2 emission intensity fell by 5% in 2017 in the Indian cement sector compared to the 2010 baseline. CO2 emission intensity, including onsite or captive power plant (CPP) power generation, was reduced by 6.8% compared to the 2010 baseline. The alternative fuels thermal substitution rate (TSR) increased by 5 times from 2010 to 2017. The sector consumed more than 1.2Mt of alternative fuels in 2017.
“Sustainability is a journey, not a destination. In our globalised and interconnected world, no one can solve alone the challenges ahead of us and the only opportunity to succeed is through collaborative partnerships, where the common interests of all are considered as more important than the sum of individual interests. This is exactly the spirit that has animated the CSI’s low carbon journey since 1999. This flagship project - with its members - has developed, implemented and shared collective solutions for measuring, reporting and improving its greenhouse gas reduction performance, year after year,” said Philippe Fonta, managing director CSI.
The CSI and the International Energy Agency (IEA) worked with nine local CSI member companies - ACC, Ambuja Cements, CRH, Dalmia Cement (Bharat), HeidelbergCement, Orient Cement, Shree Cement, UltraTech and Votorantim Cimentos - to carry out the status review on the sector’s performance trends, continuous implementation measures and notable achievements based on the milestones set in the 2013 LCTR. The Status Review Report was developed in consultation with Confederation of Indian Industry (CII), with support from International Finance Corporation (IFC) and the Cement Manufacturers Association (CMA).
The findings of the report show that the direct CO2 emission intensity was reduced by 32kgCO2/t cement to 588kgCO2/t cement in 2017 mainly due to an increased use of alternative fuel and blended cement production, coupled with a reduction in clinker replacement factor. However, the study also shows that significant efforts will be needed to meet the 2050 objectives of 40% reduction. The CO2 emission intensity (including onsite or CPP power generation) has reduced by 49kgCO2/t cement to 670kgCO2/t cement in 2017 compared to the baseline year. The report has highlighted the adoption of waste heat recovery (WHR) systems by local cement plants.
The alternative fuels TSR increased to 3% in 2017 from 0.6% in 2010. More than 60 cement plants in India have reported continual usage of alternative fuels, with 24% of the total alternative fuels consumed as biomass. The share of blended cements used in the total quantity of cement manufactured increased to 73% in 2017 from 68% in 2010, largely due to the market’s growing acceptance of blended cement, emerging awareness of sustainability concepts, the availability of fly ash from thermal power plants and the use of advanced technology. The production of Pozzolana Portland Cement grew to 65% in 2017 from 61% in 2010. The share of Portland Slag Cement in cement production remained flat, at less than 10%, over the same period. The clinker factor reduced to 0.71 in 2017 from 0.74 in 2010.
In August 2018 the Global Cement and Concrete Association (GCCA) said it was taking over the work previously done by the CSI from 1 January 2019.