Jul 20, 2012
New cement to be used for road stabilisation applicationsBack
AfriSam|Lanseria Airport|OR Tambo Inter-national Airport|Cement|Construction Materials Supplier|Road Stabilisation Applications|Specialist Product|Mike McDonald|Stephan Olivier|A New Specialist Product, Roadstab Cement|Roadstab Cement
© Reuse this
Construction materials supplier AfriSam has launched a new specialist product, Roadstab Cement, for road stabilisation applications.
The new cement has been undergoing research, development and testing for the past three years.
“This product has been developed to achieve superior stability across a range of road material types. It offers enhanced performance, even with soils with a high plasticity index,” says AfriSam product manager Mike McDonald.
He adds that the cement will offer civil engineers a good alternative for road design.
The construction materials supplier reports good results from tests conducted on the higher-clay-containing soils found in the Free State. The product was used in road stabilisation trial projects on the N8, in Tweespruit, the N1 from Fonteintjie to Wurasoord, the N6 at Smithfield and the N5 from Bethlehem to Kestell.
Consistently good outcomes were achieved, states AfriSam.
“The same excellent results have been demonstrated on projects in Gauteng. These include the Kaalfontein road, in Midrand, the R21 between Boksburg and OR Tambo Inter-national Airport and on runways at Lanseria Airport,” the supplier adds.
Stabilisation using cement improves the engineering properties of granular materials. When cementitious material is mixed with granular material in predetermined portions and adequately compacted and cured, a bound material with significant strength forms.
AfriSam states that cement with extended setting times, such as Roadstab Cement in the 32.5 strength class, is more suitable for soil stabilisation applications, because of the longer working times required to place and compact the material.
McDonald says a minimum of 2% cementitious material is required to ensure a uniform distribution of the stabilising agent throughout the stabilised layer, as cement content lower than this may result in the required strengths not being achieved, even though prior laboratory tests have indicated otherwise.
The selection of the cement type influences the time between the placing and the compaction of the stabilised layer.
“Cement starts hydrating as soon as it comes into contact with moisture. If most of the hydration has occurred by the time the material is compacted, the chemical bonds that have been formed between the cement and the soil will be broken down by the compaction process and further chemical bonding will be limited,” notes McDonald.
The release of Roadstab Cement follows AfriSam’s recent revision of its entire cement product portfolio.
“The upgrade of our cement product range forms part of our strategic vision and [the aim is] to position AfriSam as a company committed to sustainable inno- vation,” says AfriSam CEO Stephan Olivier.
Edited by: Chanel de Bruyn© Reuse this Comment Guidelines
Other Construction Materials and Equipment News
Recent Research Reports
Automotive 2014: A review of South Africa's automotive sector (PDF Report)
The report provides insight into the business environment, the key participants in the sector, local construction demand, geographic diversification, competition within the sector, corporate activity, skills, safety, environmental considerations and the challenges...
Construction 2014: A review of South Africa's construction sector (PDF Report)
Construction data released during 2013 hints at a halt to the decline in the industry during the last few years, with some commentators averring that the industry could be poised for recovery. However, others have urged caution, noting that the prospects for a...
Electricity 2014: A Review of South Africa's Electricity Sector (PDF Report)
This report provides an overview of the state of electricity generation and transmission in South Africa and examines electricity planning, investment in generation capacity, electricity tariffs, the role of independent power producers and demand-focused initiatives,...
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,...
This Week's Magazine
Creamer Media’s Electricity 2014 report provides insight into South Africa’s electricity generation, exploring the issues of State-owned power utility Eskom's generated power, coal supplies, electricity tariffs and demand-focused initiatives, as well as the...
This month’s report includes details of junior miner Papillon Resources’ mining permit for its flagship Fekola gold project, in Mali; the Waterberg Coal Company’s feasibility on the development of an opencast mine, in Limpopo, to produce ten-million tonnes a...
A structured approach, wherein managers personally engage at each level of the project, is necessary to mitigate delays to the workflow on mega construction projects, says State-owned Eskom Kusile power station projects GM Abram Masango. The 4 800 MW Kusile power...
Construction of transmission lines to evacuate power from a regional hydroelectric project in East Africa, which was hanging on the balance following the withdrawal of financing by key partners, is now back on track. After six months of uncertainty, the African...
Three Memorandums of Understanding (MoUs) were signed between South African and Malaysian companies at the Malaysian High Commission in Pretoria on Friday. These MoUs are part of the indirect offsets programme South Africa is providing in return for Malaysia’s...