R/€ = 14.15
R/$ = 10.32
Au 1230.27 $/oz
Pt 1359.50 $/oz
Mar 26, 2004
Plasticiser allows two hours of concrete workabilityBack
Chryso France|Chryso South Africa|South Africa|Norman Seymore|Chrysofluid Optima
© Reuse this A plasticiser providing unprecedent- ed two-hour-long workability of concrete, called Chrysoplast Omega 101, has been launched by Chryso South Africa. The new product created significant interest when launched by Chryso France at the Paris Batimat expo in November, last year, and will be welcomed by large- and small-scale concrete producers in South Africa, says MD Norman Seymore. He adds that the development of the new nontoxic plasticiser was as a result of Chryso customers increasingly calling for concrete – whether readymix, pumped or construction concrete, to retain its workability for longer periods; concrete plasticity at the time of pouring to maintain this workability – from batching to pouring on site; and improvement of the general aesthetics of the concrete. “These were significant technical challenges for Chryso. “In the first place, we had to design an admixture able to add record consistency to concrete, using relatively small plasticiser dosages. “Moreover, the plasticiser also had to offer flexibility, and has a more pleasing final appearance than ordinary concrete. “The new plasticiser, Chrysoplast Omega 101, is sufficiently flexible to be used within a wide range of dosages from 0,2% to 1,2% of cementitious content, ranging from low-workability concrete to fluid concrete. “Fluidity can be maintained for up to two hours to accommodate problems on site, the management of truck fleets, and to add a level of reactivity that enables the shuttering to be struck at 16 hours instead of 28 hours, even at low temperatures,” says Seymore.
He adds that the improved aesthetics of the concrete was achieved by the production of homogenous concrete devoid of bleeding characteristics.
Chryso France met the product development challenges by creating an entirely new molecule. “Chryso is the only admixture producer to have evolved structures based on the chemistry of polyoxyethylene diphosphonates. “These structures improve concrete performance and maintain workability. “Further, the company is a leader in the chemistry of polyoxyethelene polycarboxylates with, for example, the recent development of its Chrysofluid Optima and Premia ranges of new-generation water-reducing admixtures. “Given the expertise in these two areas and in organo-mineral interactions, Chryso created the molecule and Chrysoplast Omega 101 emerged,” Seymore explained.
Recent tests of the new plasticiser showed that it improves concrete cohesion substantially through maximum aggregate coating, and prevents bleed-water rising to the surface. Further, European and local trials showed that workability can be maintained for two hours, using dosages ranging from 0,3% to 0,5% of cementitious content.
Edited by: zeena isaacs© Reuse this Comment Guidelines
Other Chemicals and Petrochemicals News
Petrochemicals company BP’s first Ads to Bags donation, which has given the vinyl skins from its old advertising billboards a second life as useful school products, reached 8 000 learners this year.
Companies that use and manufacture hazardous chemicals are realising the importance of having a chemicals management system in place, as being proactive rather than reactive and implementing best-practice requirements for the safe management of chemicals puts them in...
The X-BT system offers high performance in corrosive environments and is best suited to fastening solutions in the petrochemicals industry, fastening systems manufacturer and supplier Hilti tells Engineering News.
Recent Research Reports
Defence 2013: A review of South Africa's defence industry (PDF Report)
Creamer Media’s 2013 Defence Report examines South Africa’s defence industry, with particular focus on the key players in the sector, the innovations that have come out of the defence sector, local and export demand, South Africa’s controversial...
Road and Rail 2013: A review of South Africa's road and rail infrastructure (PDF Report)
Creamer Media’s Road and Rail 2013 Report examines South Africa’s road and rail transport system, with particular focus on the size and state of the country’s road and rail network, the funding and maintenance of these respective networks, and the push to move...
Liquid Fuels 2013 (PDF Report)
Creamer Media’s 2013 Liquid Fuels report examines South Africa’s liquid fuels market, focusing on the business environment, oil and gas exploration, the country’s feedstock supplies, the development of South Africa’s biofuels industry, fuel pricing,...
Projects in Progress - Second Edition (PDF Report)
Creamer Media’s second Projects in Progress supplement considers some of the major project developments under way, including high-profile energy and transport projects, as well as a few of the lower-profile public and private developments. What remains apparent is...
Water 2013: A review of South Africa’s water sector (PDF Report)
Creamer Media’s Water 2013 report considers the aforementioned issues, not only in the South African context, but also in the African and global context, and examines the issues of water and sanitation, water quality and the demand for water, among others.
Canadian Mining Roundup for June 2013 (PDF Report)
The June 2013 roundup includes details of the development of TSX-V-listed Aldridge Minerals’ flagship Yenipazar polymetallic project, in Turkey; the Canadian Nuclear Safety Commission’s renewal of Cameco’s uranium mining licence pertaining to the Cigar Lake...
This Week's Magazine
Mitsubishi Motors South Africa (MMSA) has introduced a 4x2 derivative of its Pajero Sport sports-utility vehicle (SUV), which will give it access to a substantial slice of the full-size SUV market, where it will compete with the likes of the Ford Everest, Chevrolet...
South African Energy Minister Ben Martins has affirmed that the government wants the country to be globally competitive in the nuclear sector. "Our responsibility has always been ... to ensure that, in nuclear energy, South Africa can compete with the rest of the...
Mercedes-Benz South Africa (MBSA) president and CEO Dr Martin Zimmermann describes the new S-Class as “a special place to be”, with the car creating a sense of “wellness” once you are seated inside the German brand’s flagship model. It is difficult to argue...
Water scarcity and water-quality issues are broadly recognised and understood in most political, business and civil organisations in South Africa, but solving water issues will require wide and continuous action in catchments and municipalities by organisations and...
Work is well under way on the R212-million Imvutshane dam, 30 km north-west of Stanger, in KwaZulu-Natal, which is a key link in supplying people in rural Maphumulo with a reliable source of safe drinking water.