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News Alternative raw materials

Displaying items by tag: Alternative raw materials

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Hoffmann Green Cement Technologies launches Swiss joint venture with construction company

06 July 2022

Switzerland: Hoffmann Green Cement Technologies has launched a new joint venture with a Switzerland-based construction industry partner. Hoffmann Green Cement Technologies will hold a minority stake in the new subsidiary, which will produce its reduced-CO2 clinkerless cement at an upcoming plant. The producer says that the unit will apply the vertical production model of its existing H2 plant in France.

Co-founders of Hoffmann Green Cement Technologies Julien Blanchard and David Hoffmann said "After signing our first contract outside France more than a year ago, we are proud to accelerate our international development through a licensing model for Hoffmann Green technologies and processes. The opening of this first subsidiary in Switzerland proves the attractiveness of our carbon-free solution without clinker outside our borders, and constitutes a structuring step in the development of Hoffmann Green."

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Betolar customers to produce 250,000t/yr of Geoprime concrete by 2023

05 July 2022

India: Three new Indian concrete companies have separately secured agreements for the use of Finland-based Betolar’s Geoprime alkali-activated slag and fly ash additive. Reuters News has reported that the companies are Balaiji Cement Products, Shiv Tiles and SNEH Precast. Engineering company Godrej & Boyce has also signed a letter of intent with the supplier for pilot production of concrete blocks, paving slabs and other elements.

Betolar expects producers to achieve global concrete production volumes of 250,000t/yr of concrete containing Geoprime by 2023.

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Eco Material Technologies secures Georgia Power ash mining contract

30 June 2022

US: Eco Material Technologies has won a contract with Georgia Power to mine 600,000t/yr from the energy company’s Plant Bowen ash dump in Cartersville, Georgia. Eco Material Technologies will use the ash to produce its 99% reduced-CO2 building materials, including an alternative cement with 20% greater compressive strength than ordinary Portland cement (OPC) after 28 days, according to the company.

Grant Quasha, CEO of Eco Material Technologies, said "As the largest partnership of its kind in the US, this project will not only use material from landfills and ash ponds, but also keep millions of tonnes of CO2 from going into the atmosphere."

Published in Global Cement News
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Nevada Department of Transportation approves Portland limestone cement for road projects

28 June 2022

US: The Nevada Department of Transportation has approved the use of Portland limestone cement (PLC) for road construction and repairs. The department expects the move to reduce CO2 emissions by 4000t/yr. It uses 45,000t/yr of cement in its projects. Local press has reported that transport contributed 35% of Nevada’s CO2 emissions in 2022, making it the largest single source.

Published in Global Cement News
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Karbonite UK develops new supplementary cementitious material

27 June 2022

UK: Karbonite UK has developed a new supplementary cementitious material consisting of mineral feedstock, geopolymers and waste biomass. The process also involves CO2 sequestration and liquid-infused CO2 absorption within the mineral structure. The material, called Karbonite, is activated at 750 – 850°C, releasing water, which is captured for recycling. Its CO2 emissions are 2.7kg/t, according to Karbonite UK. The developer says that Karbonite ground with 50% clinker yields a cement of equal compressive strength to ordinary Portland cement (OPC).

Karbonite UK is currently preparing a final report on the product for a major cement producer.

Managing director Rajeev Sood said “Karbonite offers a wealth of potential to an industry targeting net zero. We are excited to talk to cement and concrete producers about how they could integrate Karbonite technology into their existing process.”

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Holcim France produces 100% recycled clinker

21 June 2022

France: Holcim France has announced its successful industrial-scale production of the world's first 100% recycled clinker. The La Tribune newspaper has reported that the company's Altkirch, Alsace, cement plant produced the clinker. Holcim France chief executive officer Francois Petry said that the plant's team collaborated with researchers at the Holcim Innovation Center to develop a recipe that incorporated multiple waste streams, including mineral wastes and wood ash. The producer says that most of the waste materials were locally sourced.

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Cemex España to import 10,000t/yr of slag for Lloseta cement plant

21 June 2022

Spain: Cemex España has received clearance from the Balearic Islands Environmental Commission (CMAIB) to import up to 10,000t/yr of granulated blast furnace slag (GBFS) to Majorca. Ultima Hora Online News has reported that the producer will substitute some of the limestone used in the company's Lloseta plant's cement production with the material.

Waste management company Tirme previously handled the Lloseta cement plant's slag supply.

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Progressive Planet Solutions develops new supplementary cementitious material from diatomaceous earth

10 June 2022

Canada: Progressive Planet Solutions has successfully produced a new supplementary cementitious material (SCM) called PozDE from diatomaceous earth. The company says that it developed PozDE using calcium bentonite-containing diatomaceous earth from the Red Lake mine in Kamloops, British Colombia. The SCM’s seven-day and 28-day strength activity index (SAI) values are 101% and 120% those of ordinary Portland cement (OPC) respectively, while its water demand is lower at 98%.

Chief operating officer Ian Grant said “It is uncommon to see SCMs exceed the 7-day strength of the control Portland, so we are excited to see better strength while indicating lower water demand."

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Prometheus Materials develops cement-free blocks using algae

10 June 2022

US: Prometheus Materials has successfully developed cement-free blocks from a material produced by biomineralising cyanobacteria. Dezeen News has reported that the American Society for Testing and Materials (ASTM) has approved the materials for construction applications.

Director Wil V Srubar III said "Coral reefs, shells and even the limestone we use to produce cement today show us that nature has already figured out how to bind minerals together in a strong, clever and efficient way. By working with nature to use existing microalgae to bind minerals and other materials together to create new types of sustainable biocomposite building materials, we can eliminate most, if not all, of the carbon emissions associated with traditional concrete-based building materials."

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LafargeHolcim Brasil secures environmental certification for blast furnace slag cement

24 May 2022

Brazil: The Falcão Bauer Quality Institute (IFBQ) has certified LafargeHolcim Brasil’s CP III-32 blast furnace slag cement for all construction applications. The certificate confirms that the product offers 50% reduced CO2 compared to the average cement on the Brazilian market.

The Jornal Dia Dia newspaper has reported that sustainability manager Bruno Hallak said “The IFBQ is an institution recognised by the market and this certification confirms that we are on the right track. The production processes and methodologies evaluated can even be reproduced in other units, according to their local characteristics, increasing the gain for the environment.”

LafargeHolcim Brasil previously obtained IFBQ certification for its CP III-40 blast furnace slag cement, which offers a slightly less reduced clinker factor than CP III-32 cement, in 2021. It was the first cement of its type in Brazil to receive the certification. The company produces both cements at its Vitória grinding plant in Espírito Santo.

Published in Global Cement News
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