Displaying items by tag: fly ash

India: Tata Steel has begun the export of Linz-Donawitz (LD) slag from its steel production processes to Bangladesh. The United News of India has reported that a Bangladeshi cement producer has purchased the material for use in its cement production. China-based cement shipping company Cemcoa will deliver the slag.

Chief operating officer Subodh Pandey said that Tata Steel continually pursues operational and market-facing innovations by creating value out of its by-products, as part of its quest to a sustainable future. It has achieved 100% granulated blast furnace slag (GBFS), fly ash and LD slag recycling.

Finland: Betolar has launched Geoprime, an alkali-activated additive for slag and fly ash used in concrete production. The company says that the product will enable concrete production from raw materials with 80% lower CO₂ than ordinary Portland cement (OPC). It aims to meet the growing demand for sustainable and cost-effective construction materials. Geoprime enjoys fast global scaling potential thanks to Betolar’s intellectual property licensing business model, which enables the use of existing production facilities, according to the company.

Chief executive offcier Matti Löppönen said “We have seen a massive shift in the concrete manufacturing and construction industries driven by investor pressure for environmental, social and governance data transparency and Net Zero commitments, and now people are keen to hear what we have to offer.”

UK: DB Group and Wolfenden Concrete have announced the upcoming launch of Supa Green, a range of cement-free agricultural concrete products produced using DB Group’s Cemfree technology. The partnership says that this assures a 62% maximum CO₂ reduction compared to concrete products made with Ordinary Portland Cement (OPC). It further says that the products have increased acid resistance. Cemfree is a low carbon concrete made using ground blast furnace slag (GGBS) and pulverised fly ash.

DB Group chief executive officer Wayne Zakers said, “DB Group’s mission is to improve the durability and sustainability of construction, working most intimately with our innovative partners. Working with Wolfenden will enable us to embed that innovation within the agricultural sector and to extend the benefits of our Cemfree technology to dairy farmers across the UK. The testing of Supa Green products has proven extremely successful, and so we look forward to the launch of the range, and to helping Wolfenden’s customers meet and exceed environmental targets.”

Russia: The Ministry of Energy has launched its roadmap for the use of slag and ash by the cement industry and in road building. Soyuztsement has reported that the roadmap lists pilot projects for the products’ use. Currently, 5 – 7% of ash and slag waste (ASW) is used. Under its Comprehensive Plan to Increase the Utilisation of Solid Fuel Combustion Products bill, published in mid-2020, the ministry plans to increase the ASW utilisation rate across Russia to 50% by 2035. This amount could cut 6.2Mt/yr of the cement industry’s direct CO2 emissions, corresponding to under 1% of its emissions in 2020. Additionally, it would lead to the production of lighter and reduce the thermal conductivity of concrete.

The bill is due for submission before the Russian parliament in April 2021, followed by a second bill to provide for incentives to slag and ash producers in September 2021.

UK: DB Group has supplied its Cemfree concrete product to a site in Birmingham, West Midlands for use by the Environment Agency in a flood defence project. It says that the agency will use the concrete “for kerb bedding and backing over several kilometres in conjunction with various recycled products in an effort to reduce the projects’ carbon footprint.” Cemfree is a low carbon concrete made using ground blast furnace slag (GGBS) and pulverised fly ash.

US: CRH subsidiary Ash Grove Cement says that it is undertaking an upgrade of its Port Manatee, Florida deep water cement terminal to install a high capacity FLSmidth Kovako unloader and modernise existing material transfer and electrical systems, as well as establishing self-loading capabilities. The aim of the upgrade is “to improve Ash Grove’s capacity to import cement clinker, slag and fly ash to meet the existing and future needs of customers in the Florida and South Georgia markets.

Regional president Monica Manolas said, “The underlying fundamentals in the Florida market are positive with good population and employment growth. The upgrade of the Port Manatee import terminal will expand our capabilities and strengthen our ability to meet growing demand in the region.”

The company says that construction will begin in early 2021 and the upgraded terminal will open in late 2021.

Australia: Researchers from the University of New South Wales (UNSW) and CRC for Low Carbon Living (CRCLCL) are testing a geopolymer concrete made from fly ash and blast furnace slag on a road in Sydney. A 30m stretch of road is being trialled with 15m of traditional concrete and 15m of a geopolymer concrete. Nine sensors have been positioned under the concrete to monitor and compare how the geopolymer concrete performs. The results from the trial will be used to create the first set of industry guidelines for geopolymer concrete.

“While we’ll monitor the road performance for up to five years, a lot of the data collected in the first three to 12 months of this world-first trial will be used to confirm our models and strengthen our predictions,” said Professor Stephen Foster, Head of the School of Civil and Environmental Engineering at UNSW and the CRCLCL project lead.

US: Charah has opened a slag grinding plant at the Port of Coeymans near Albany, New York. The unit uses the company’s proprietary process to grind granulated blast furnace slag (GBFS) to create supplementary cementitious materials (SCMs). The site is accessible by ship, truck and rail and will sell materials to concrete producers in the northeast of the country.

The new plant will also produce slag cement that is marketed under the MultiCem brand. Slag cement will be distributed throughout Charah Solutions’ MultiSource materials network, a nationwide distribution system of more than 30 sourcing locations that provide ready mix concrete (RMX) producers and other customers SCMs, including fly ash and slag cement.

China: Lushan Conch has completed preparation for a project to use slag and fly ash. The subsidiary of Anhui Conch said that it has completed transport bidding work and had completed an underwriting process to support production usage. The plant is also making arrangements to use synthetic gypsum.

The company surpassed its target of 200,000t for production and sales of cement in September 2018 with 215,300t and 217,700t respectively. 105,800t of the total sales were sold as bulk cement.

US: Charah has purchased SCB International to jointly develop and deploy technologies including fly ash beneficiation and mineral grinding technologies. Its intentions are to target: the beneficiation of fly ash for sale to concrete producers; processing kiln dust to remove mercury for emissions regulations compliance; and grinding granulated blast furnace slag (GBFS) and pozzolan for sale to concrete producers. Charah says that the acquisition will also allow it to more than double the volume of materials available to its customers.

“By leveraging SCB’s diversity of materials available and by benefiting from their experience in sourcing materials overseas, we see great potential in marketing the fly ash beneficiation and grinding technologies to our customers, both utilities and concrete producers,” said Scott Ziegler, Vice President of Ash Sales and Marketing at Charah.

As part of this agreement, Charah has acquired SCB’s proprietary fly ash beneficiation technology which will allow Charah to improve the quality of fly ash produced by electric utilities and to increase Charah’s supply of fly ash to concrete producers in the US. Charah also will deploy grinding technologies for GBFS and pozzolan and will market these supplementary cementitious materials (SCMs) to the manufacturers of concrete products.

Both the ash beneficiation and the mineral grinding technologies will support Charah’s expanding MultiSource fly ash distribution network. The MultiSource fly ash network will help ensure that Charah can provide a steady and reliable supply of SCMs for ready mix concrete producers throughout the US.

Charah provides ash management, fly ash sales and marketing and utility support services for the coal-fired power generation industry. Its services include landfill design, construction, management, operations and closure; fly ash, bottom ash and gypsum sales and marketing; ash pond management and closure; structural fill projects; and power plant support services including limestone supply and flue-gas desulfurisation operations