Displaying items by tag: alternative raw materials

US: Holcim US has announced the launch of its ECOPact reduced-CO₂ concrete in the Fargo, North Dakota, and Twin Cities, Minnesota, metropolitan areas. ECOPact products offer up to 80% reduced CO₂ emissions compared with ordinary Portland cement (OPC)-based concretes, and can also integrate construction and demolition waste. Holcim US has sold the ECOPact range in Boston, Massachusetts, and Washington DC since 2020.

Holcim US' North Central regional senior vice president Randy Gaworski said "With countless developments already in the pipeline, and so much on the horizon, engineers, architects and developers are driving demand to integrate sustainable building practices throughout the region. This is an exciting opportunity to offer our customers high-quality, low-carbon products for meeting our shared commitments to sustainability and net-zero construction."

Namibia: Ohorongo Cement Namibia has supplied 3000m³ of cement to the site of NamPower's upcoming Sekelduin power plant in Swakopmund. Ohorongo Cement used 730t of its CEMIR cement, which contains 30% fly ash, combined with an additional 30% fly ash in the concrete mixer. The producer said that the extra ash increases the finished product's density, reducing permeability.

Ohorongo Cement said that the project is 'near completion,' having begun in mid-2021.

Belgium: The EU Innovation Fund has awarded Euro4.5m to a consortium consisting of Prefer, gas provider Fluxys Belgium, lime producer Lhoist and carbonation technology developer Orbix. The collaborators are working on a project called CO2ncrEAT. The project will carbonate steel sector by-products with captured CO₂ from Lhoist's Hermalle lime plant to produce alternative building materials. CO2ncrEAT will be the first project to employ Orbix's innovative technique for the purpose. Fluxys Belgium's pipeline technology will convey the Hermalle plant's emissions over a distance of 2km to a Prefer concrete blocks plant.

The consortium said that it will use 12,000t/yr of CO₂ to produce 100,000t/yr of reduced-CO₂ concrete blocks. The use of alternative raw materials in the blocks will further reduce their carbon footprint by 8000t/yr.

Prefer managing director Raphaël Grimont said “As market leader, we must ensure the sustainability of our business by offering innovative and eco-friendly products to our customers. With the CO2ncrEAT project, our building materials will be produced through a sustainable and efficient process and based on local, circular raw materials. The Prefer masonry block of tomorrow will retain all the advantages of the traditional block, with the difference that it will benefit from a negative carbon footprint. We are proud to develop this exceptional project together with key industrial partners, while benefitting from the trust of the European, Belgian and Walloon authorities.”

Canada: Lafarge Canada has signed an agreement with power provider TransAlta to recover and process fly ash from the site of the latter's decommissioned Edmonton coal-fired power plant. The project will use Ash-TEK's Ponded Ash Beneficiation System (PABS) fly ash beneficiation technology. The processed ash will then be able to replace up to 25% of cement in low-CO₂ concrete production.

TransAlta previously secured with Lafarge Canada for the supply of renewable power to its Exshaw, Alberta, cement plant in February 2022.

Australia: First Graphene has partnered with Suvo Strategic Minerals to develop graphene-enhanced metakaolin for use in cement and concrete production. Metakaolin is a pozzolanic material derived from kaolinite clay. The partners believe that the technology has commercial potential to improve concrete performance and reduce CO₂ emissions.

Colombia: Cemex has announced the launch of the Tunjuelo Circularity Centre at its former Tunjuelo quarry near Bogotá. Having rebuilt parts of the 50m-deep quarry with demolition waste, Cemex will now work on its ecological restoration, while continuing to receive excavation waste for reconstruction of the ground. It will meanwhile divert demolition waste deliveries for recycling in aggregate production. In Bogotá, Cemex has launched an initiative for urban construction partnerships in collaboration with local authorities. It will also collect municipal solid waste (MSW) there for use in its cement production and collect its used plastic cement bags for recycling in building materials production.

Cemex’s Colombia and Peru president Alejandro Ramírez said "This is a pioneering model for Cemex in the construction materials industry globally, which we aim to position as a benchmark for circularity within the sustainable development of large cities in Colombia and the world. A piece of land that supplied materials for Bogotá's development for decades has received construction and demolition waste for its redevelopment and was transformed into a green area to the south of the city, an epicenter of the circular economy and an opportunity for urban development for the capital city of Colombia."

China: A team at Southeast University has developed an alternative concrete that contains 8% cement. It uses coral reef limestone fragments and biodebris with an upper particle size of 53mm as fine aggregate. The researchers concluded that the material proved suitable for use in precast concrete paving slab production.

India: Finland-based Betolar has launched its first concrete products manufactured using Geoprime on the Indian market. Geoprime is an additive designed for use in cement-free concrete production with ash and ground granulated blast furnace slag (GGBFS). The new concrete product range consists of precast blocks, paving slabs and tiles, and is currently on display at World of Concrete India in Mumbai, Maharashtra.

Betolar's India managing director Abhishek Bhattacharya said "We are happy to introduce our first products to our customers for the Indian markets. We have now moved from laboratory tests into the production phase, and can show concretely how well this solution works. It is great to hear the feedback from the concrete industry in the region to our sustainable solution. Decarbonisation of the concrete industry is a very current and important topic."

Argentina: ECOPact reduced-CO₂ concrete accounted for 50% of Holcim Argentina’s cement deliveries at the end of the first half of 2022, a higher share than in any other country apart from the UK. Holcim launched ECOPact concrete across its markets in June 2021. Holcim Argentina plans to execute new investments to further increase its distribution of the product.

The company’s head of concrete José Villacreses said “We have set ourselves even more challenging goals. We will be the undisputed ally for sustainable projects throughout Argentina. Whoever wants to measure their carbon footprint to offer sustainable construction will find in Holcim the necessary solution to be able to achieve the certifications that society demands today.”

Spain: CRH’s Catalonian ready-mix concrete subsidiary Beton Catalan has partnered with Grapheno Smart Materials in order to implement the latter’s graphene technology in its high-performance concrete products.

Beton Catalan’s quality director Alberto Arenillas said that the company’s high-performance concrete products require ‘a significant amount of CEM I cement,’ He said “By introducing the graphene additive, the nominal amounts of this cement can be reduced or changed to cement with a lower carbon footprint, improving its performance.” The company will sell the graphene-enriched concrete under its BeGreen reduced-CO₂ products label.