Displaying items by tag: ground granulated blast furnace slag

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.”

Canada: Carbicrete has secured US$1.5m in funding from US-based SQN Venture Partners (SQNVP). The funds will finance research and development activities at its new Lachine laboratory, as well as operations at its Drummondville pilot plant in Quebec. It said that this brings its total funding received from major investors in 2020 to US$8m with investment already agreed from Harsco Environmental, the Quebec Ministry of Energy and Natural Resources and Sustainable Development Technology Canada (SDTC). The technology company is developing concrete products made with steel slag for the construction industry.

Chief executive officer (CEO) Chris Stern said, “This venture debt cash injection following our equity financing further underlines the thesis that the financial markets are believing in value-added, carbon-negative technologies such as CarbiCrete that mitigate CO₂ in our atmosphere. We are proud to have SQNVP as an investor in our company.”

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.

Egypt: Suez Cement subsidiary Ready Mix Beton says that it has secured a contract for the supply of concrete for the construction of two new monorail lines projects. Due to begin in late-2020, the contract covers the construction of a monorail line between Cairo and the New Administrative Capital and another between 6 October City and Giza. The company says that it will use Suez Cement’s CEM III/A ground granulated blast furnace slag (GGBFS) cement to produce concrete for the 96km monorail network.

Suez Cement said, “CEM III/A cement is highly recommended when building thick concrete supports and massive structures because its hydration temperature of less than 210kJ/kg reduces cracking compared with Ordinary Portland Cement (OPC) when the applied concrete is subjected to dual exposure to sulphates and chloride ions, as happens in coastal areas.”

India: The Bureau of Indian Standards' Hyderabad branch office has granted a licence for a slag cement product made by UltraTech Cement. The ground granulated blast furnace slag product is for use for use in cement, mortar and concrete according to Indian Standard IS 16714:2018, according to the Press Trust of India.

UK: Fairport Engineering has revealed details on its work on Hanson’s 1Mt/yr Purfleet ground granulated blast furnace slag (GGBS) grinding plant. The plant includes two closed circuit ball mills and a vertical roller mill. Fairport Engineering worked on a project to improve the raw material intake facilities at the unit to replace a storage bunker with a new feed hopper and ramp. In the next phase the bunker is likely to be removed and replaced with a second feeding system.

The new system includes a reinforced concrete access ramp that will allow front-end loaders to deposit raw material into a 30t capacity Hardox lined hopper before being metered, at up to 200t/hr, by a vibrating feeder, onto an exiting conveyor belt that feeds the GGBS plant. The entire installation was completed in six weeks.

US: The United State Geological Survey (USGS) estimates that 16Mt of ferrous slag was produced in 2018. Blast furnace slag accounted for about 50% of the sales volume. Nearly 90% of this value was from sales of granulated slag. Steel slag accounted for almost all of the remainder. 2.2Mt of slag was imported. Slag was processed by about 25 companies servicing active iron and steel facilities or reprocessing old slag piles at about 140 processing plants in 30 states.

The USGS said that locally produced granulated blast furnace slag was in limited supply in 2018 due to granulation cooling only being available at two active US blast furnaces. Supply of basic oxygen furnace (BOF) steel slag was similarly affected due to plant closures. As per 2017, ground granulated blast furnace slag (GGBFS) sales volumes have failed to match increases set by the overall US cement industry since 2010 despite positive long term trends.

US: The United State Geological Survey (USGS) estimates that 15Mt of ferrous slag was produced in 2017. Blast furnace slag accounted for about 50% of the sales volume. About 85% of this value was from sales of granulated slag. Steel slag accounted for almost all of the remainder. 2.2Mt of slag was imported. Slag was processed by about 25 companies servicing active iron and steel facilities or reprocessing old slag piles at about 175 processing plants in 30 states.

The USGS reported that the supply of blast furnace slag continued to be ‘problematic’ in the US due to the closure of blast furnaces and depleted slag piles. Supply of basic oxygen furnace (BOF) steel slag was similarly affected due to plant closures. However, ground granulated blast furnace slag (GGBFS) sales volumes have failed to match increases set by the overall US cement industry since 2010 despite positive long term trends.

Ireland: Ecocem says that its slag cement products have saved 10Mt of CO₂ emissions compared to regular cement since it started trading in 2002. It produces cement products from ground granulated blastfurnace slag (GGBS). It says its GGBS cement has a carbon footprint of 32kg CO₂/t compared to 850 - 900kg CO₂/t for Ordinary Portland Cement (OPC). The Irish company operates four plants in Europe with a production capacity of 2.4Mt/yr.

UK: HeidelbergCement’s subsidiary Hanson is supplying its Regen GGBS (ground granulated blastfurnace slag) cement replacement for a project to build a new tidal barrier across the New Cut River in Ipswich. The Euro24m project is being managed by the Environment Agency to protect properties at risk of flooding.

The work is being carried out by VBA, a joint venture between VolkerStevin, Boskalis Westminster and Atkins, and is due to be fully operational by September 2018.