http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 13.93Change: 0.00
R/$ = 12.67Change: -0.01
Au 1095.49 $/ozChange: 0.31
Pt 984.00 $/ozChange: 2.00
 
 
Note: Search is limited to the most recent 250 articles. Set date range to access earlier articles.
Where? With... When?








Start
 
End
 
 
And must exclude these words...
Close Main Search
Close Main Login
My Profile News Alerts Newsletters Logout Close Main Profile
 
Agriculture   Automotive   Chemicals   Competition Policy   Construction   Defence   Economy   Electricity   Energy   Environment   ICT   Metals   Mining   Science and Technology   Services   Trade   Transport & Logistics   Water  
What's On Press Office Tenders Suppliers Directory Research Jobs Announcements Letters Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
Mar 25, 2004

Plasticiser allows two hours of concrete workability

Back
Construction|Expertise|Africa|Aggregate|Concrete|Design|Readymix|Water|Africa|Product|Water
Construction|Expertise|Africa|Aggregate|Concrete|Design|Readymix|Water|Africa||Water
construction|expertise|africa-company|aggregate|concrete|design|readymix|water-company|africa|product|water
© 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 (150 word limit)
 
 
 
 
 
 
 
 
Other Chemicals News
SANITATION PRODUCTS GreenWorx sells its biological sanitation products for use in urban systems
Bacteria of the Bacillus subtilis species secrete four enzymes that break down organic material to enable the bacteria to digest it, and microbiological cleaning company Green Worx Cleaning Solutions uses their natural functions to clean organic waste in sanitation...
Article contains comments
The South African Nuclear Energy Corporation’s (Necsa’s) subsidiary company NTP Radioisotopes has, in conjunction with the Steve Biko Academic Hospital/University of Pretoria and Germany’s ITG Isotopes Technologies Garching, undertaken a new anti-cancer procedure in...
AECI CEO Mark Dytor
Explosives and specialty chemicals company AECI’s R400-million bulk property sale, in Somerset West, paired with a maintained market share, despite a difficult environment, pushed its headline earnings for the six months to June 30, up 45% to R632-million, compared...
More
 
 
Latest News
Embattled South African steel producer ArcelorMittal South Africa (AMSA) has offered insight into the “fair pricing model” it has tabled before government in return for tariff protection and a government stipulation that locally manufactured steel be designated for...
Telecommunications group Telkom on Friday said it had posted a 1.7% uptick in net revenue for the three months to June 30, on the back of a strong performance by mobile on data revenue and higher fixed-line subscription revenue. Mobile net revenue for the first three...
Dangote Cement revised its 2015 spending plans to $1-billion from the $700-million estimated nine months ago after it commissioned two new African plants this June, Nigeria's biggest listed company said on Friday. The company, majority owned by billionaire Aliko...
More
 
 
Recent Research Reports
Real Economy Year Book 2015 (PDF Report)
There are very few beacons of hope on South Africa’s economic horizon. Economic growth is weak, unemployment is rising, electricity supply is insufficient to meet demand and/or spur growth, with poor prospects for many of the commodities mined and exported. However,...
Real Economy Insight: Automotive 2015 (PDF Report)
Creamer Media’s Real Economy Year Book comprises separate reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, gold, iron-ore and platinum sectors.
Real Economy Insight: Water 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
Real Economy Insight: Construction 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
Real Economy Insight: Electricity 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
Real Economy Insight: Road and Rail 2015 (PDF Report)
Creamer Media’s Real Economy Year Book has been divided into individual reports under the banner Real Economy Insight and investigates key developments in the automotive, construction, electricity, road and rail, steel, water, coal, gold, iron-ore and platinum sectors.
 
 
 
 
 
This Week's Magazine
Daimler truck test engineer Dirk Stranz pushes one button, and then retracts his hands from the steering wheel of the Mercedes-Benz Future Truck 2025. “And now the truck is driving itself.”
The statutory body responsible for skills development and support in the banking sector, BANKSETA, was investing R68-million in the capacity building project of the University of Venda (UniVen), announced Bankseta company secretary Caroline King at a media event in...
LIONEL MOYAL Cloud services providers must compete against other cloud services providers for business by providing up-to-date systems and services
Legacy information technology (IT) systems are becoming increasingly obsolete because of the maturity, efficiencies and cost effectiveness of cloud-based IT services, says information and communication technology major T-Systems subsidiary Intervate head Lionel...
ARMANDÉ KRUGER Balancing the collection and processing of data must be aligned to strategy
Many complementary services enable companies to derive broad value from data inside and outside them. The complexity of data management means that companies’ strategies determine the various data systems and functions they will use, says PBT Group regional sales...
The South African Civil Aviation Authority (SACAA) has announced that it had awarded the country’s first remotely piloted aircraft systems (RPAS) pilot’s licence. It was issued on Friday, July 10, to SACAA employee and qualified commercial pilot Nicole Swart,...
 
 
 
 
 
 
 
 
 
Alert Close
Embed Code Close
content
Research Reports Close
Research Reports are a product of the
Research Channel Africa. Reports can be bought individually or you can gain full access to all reports as part of a Research Channel Africa subscription.
Find Out More Buy Report
 
 
Close
Engineering News
Completely Re-Engineered
Experience it now. Click here
*website to launch in a few weeks
Subscribe Now for $96 Close
Subscribe Now for $96