Cement News tagged under: CO2 emissions

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Belterra clay could replace limestone in cement production

11 October 2021, Published under Cement News

In a study, funded partly by the Brazilian Ministry of Education, Martin Luther University Halle-Wittenberg (MLU), Germany, and Brazil’s University of Pará, have found that CO2 emissions can be reduced during cement production by up to two-thirds by adding Belterra clay, unused overburden from bauxite mining. "This layer of clay can be up to 30 metres thick and covers the bauxite deposits in the tropical regions of the earth, for example in the Amazon basin," explains Professor Herbert Pöl...

Clay calcination – accelerating cement’s green transition

30 August 2021, Published under Cement News

With the cement industry’s goal of working towards saving the planet, FLSmidth proposes a simple switch: replace 30 per cent of clinker with calcined clay for up to a 40 per cent reduction in CO 2 emissions. In this article the company outlines why the move is not only smart and efficient but is something almost every cement manufacturer could do right now. By Steven Miller, FLSmidth, Denmark. Figure 1: FLSmidth’s clay calciner system With seven per cent of all global carbon em...

Producing boron cement

24 August 2021, Published under Cement News

The creation of low-energy belite clinker is a specific area of research that aims to reduce CO 2 emissions from the cement manufacturing process. Boron minerals, of which Turkey has 73 per cent of the world’s reserves, are a possible raw material that can be used in the production of belite cements. TÜRKÇIMENTO, the Turkish cement manufacturers’ association has carried out a study into the use of colomonite boron ores to determine their suitability for the production of boron cement. By Se...

ACC sets out 2030 sustainability targets

13 August 2021, Published under Cement News

ACC has become the first company in the Indian construction sector to sign the “Business Ambition for 1.5°C” commitment with 2030 intermediate targets approved by the Science Based Targets initiative (SBTi), according to a press release. ACC has committed to reducing scope 1 GHG emissions/t of cementitious material by 21.3 per cent and scope 2 GHG emissions/t by 48.4 per cent by 2030, compared with a 2018 base year. "At ACC, we continuously strive to become a responsible and sustainable c...

Green hydrogen at Hanson

26 July 2021, Published under Cement News

Hanson is collaborating with researchers at the Energy Safety Research Institute at Swansea University, UK, looking at innovative technologies to reduce industrial carbon emissions. A new hydrogen demonstration unit, which generates green hydrogen through renewable energy, has been developed and installed at the cement producer’s Regen GGBS works in Port Talbot, UK, to replace some of the natural gas used to power the plant. By Dr Charlie Dunnill, Energy Safety Research Institute, UK. ...

Cemex sets aggressive new 2030 carbon emission targets

25 June 2021, Published under Cement News

Cemex has set a more aggressive carbon reduction target of below 475kg of CO 2 per tonne of clinker produced, approximately a 40 per cent reduction in CO 2 emissions by 2030. The new target is below the two degree global warming scenario of the Science Based Targets Initiative (SBTi). Cemex is also planning to set a new target of 520kg of CO 2 /t of clinker produced by 2025, equivalent of a 35 per cent emission reduction. The company is also reducing CO 2 emissions from its concrete bu...

Republic Cement launches AI tool to optimise raw mix

24 May 2021, Published under Cement News

Philippines-based Republic Cement is rolling out a new AI tool to all its cement plants to reduce its CO 2 emissions and produce a stronger cement. The tool will optimise concentrations of raw ingredients in the cement mix by harnessing complex algorithms to save time and resources in its Bulacan and Batangas works as well as running the software as a pilot in its Teresa works in Rizal. “Our next step is to deploy this in all sites by the end of the year,” said Republic Cement’s Vice Pres...

The industry’s response to the decarbonisation challenge

05 May 2021, Published under Cement News

Dr Michael Clark discusses the cement sector’s response and strategies in terms of the large-scale challenges involved with decarbonisation. LafargeHolcim’s Richmond plant in Canada, where it launched Project CO 2 MENT In last month’s Technical Forum we discussed the new CemNet online training material regarding the decarbonisation of cement manufacturing. This month we will turn our attention to the industry’s response to that challenge. There is no doubt that the world’s ma...

Alkali-activated materials

16 March 2021, Published under Cement News

While blastfurnace slag and metakaolin are known to produce a binder phase following alkali activation, the range of alkali-activated materials is wider than these two materials. This month Arthur Harrisson provides an overview of low-and high-calcium precursors that are subjected to alkali activation to produce binders. Figure 1: fly ash, a low-calcium AAM precursor Materials that arise as waste or a by-product from industrial processes other than Portland cement manufacture ha...

Lehigh Hanson partners with Fortera to reduce carbon emissions

15 March 2021, Published under Cement News

North America's Lehigh Hanson (HeidelbergCement) and Fortera Inc have announced a collaboration project to reduce emissions from Portland cement production. The two companies will work together to construct and operate a small commercial plant at Lehigh's cement facility in northern California. The plant will capture CO 2 from the kiln exhaust and convert it into a cementitious material. This can then be blended with Portland cement and used by ready-mix concrete producers as an SCM or us...