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Cement and Concrete

Fibre optics and ultrasonic concrete testers

By: System Author     9th July 1999 French fibre optic control systems monitor construction and building sites to provide real-time location of all structural defects, with an accuracy of 100  

R5,4-million concrete strand supply contract

By: System Author     9th July 1999 LOCAL company Haggie Wire and Strand has supplied prestressed concrete strand to the value of R5,4-million to the 250 ha Century City development outside Cape Town. “The product is a 15,24 mm diameter unbonded strand that is being supplied over a period of 12 months and the first delivery... 

Independent cement producers get a voice

By: System Author     4th June 1999 A new association has been established to give independent cement producers a voice in the industry, and to recognise their hard-won credibility. This is the Independent Cement Producers’ Association (ICPA) chaired by Ian McKenzie. He tells Engineering News that what has happened... 

‘Demanding’ new standards set minimum test parameters

By: System Author     4th June 1999 The new standard for common cements is far more demanding than the previous South African Bureau of Standards (SABS) standards, with producers having to perform tests (that is, auto control) for a period of at least six months, and a maximum of a year, in order to assess conformity, as well as... 

Textile concrete launched

By: System Author     4th June 1999 A new material devel- oped in South Africa and known as textile concrete (TC) could prove to be a shot in the arm for the textile industry as well as boost cement sales, believes inventor Don Hourahane. He predicts that TC will eventually develop into a separate industry at least the size of the... 

Fly ash producer is one of world’s largest

By: System Author     4th June 1999 Producing 1,2-million tons of fly ash a year from three plants based at Eskom’s Matla, Kendal and Lethabo power stations, Ash Resources is one of the world’s largest, GM Bert Dijkema tells Engineering News. Fly ash is used as a partial replacement (or extender) for cement in concretes... 

Safety and productivity questions underpin standards debate

By: System Author     4th June 1999 THE South African Bureau of Standards (SABS) mark, which is now mandatory for all cement producers, only represents the minimum standard, and compliance with these standards is essential. This is the view of Concor Holdings MD Gavin Hardy, who points out that a big marketing exercise needs to be... 

Management program a first for SA concrete sector

By: System Author     4th June 1999 In a first for the South African concrete industry, Durban-based company Concrete Management (CM) has developed a computer program that offers a superior materials- and strength-management system. “The manufacture, supply and management of fresh concrete has by no means been excluded from... 

Design, application must be cast in stone

By: System Author     4th June 1999 The correct design and application of concrete products are the main challenges faced by the concrete industry and, as such, the Concrete Manufacturers’ Association (CMA) produces large quantities of literature to enable the designer, architect, engineer and contractor to do this correctly,... 

Workshops set to probe latest in concrete

By: System Author     4th June 1999 A series of workshops to discuss develop- ments and advances in concrete technology will be co-ordinated by Professor Mark Alexander of the department of civil engineering of the University of Cape Town (UCT). Based on extensive research done by the department, the industry and other engineering... 

1998 cement demand shows –3% decline

By: System Author     4th June 1999 Although the new cement standards, effective since July 1 last year may make it more difficult to make cement, as they are more stringent, they will benefit the consumer in that a more consistent product will be manufactured, maintains Cement & Concrete Institute executive director Dr Graham... 

Traditional slag properties enhanced by new strategy

By: System Author     4th June 1999 As part of its strategy to regain market share in the South African cement industry, specialist slag producer Slagment has employed leading-edge technology to develop Slag 5000, a more finely-ground blast-furnace slag that enhances the properties of traditional slag, reveals MD Shaun Patterson.... 

Concrete and asphalt squaring up

By: System Author     28th May 1999 While asphalt is generally regarded as first choice in high-quality road construction, concrete block paving (CBP) is a good alternative for roads where load-bearing capacity is the chief concern. This was stated in a paper on CBP presented by SR Bangma of the University of Twente, the... 

R400-million project on schedule

By: System Author     21st May 1999 THE R400-million Nedcor North Site development in Sandton, Gauteng, is on track to be completed on time in October 2000, reports project manager Ampros Developments (Amdev) a year after excavations began. Amdev senior project manager Eddie Beckwith says the development’s ambitious deadline... 

Cordless tools offer no strings

By: System Author     30th April 1999 An innovative new system offered by Bosch, combining a cordless tool, a battery pack and a charger, guarantees outstanding performance and long life of components. The extensive range of Bosch cordless tools offers a cable-free solution for many applications, such as concrete and masonry... 

Electronic rotary hammer

By: System Author     30th April 1999 Industrial power-tool company Metabo Power Tools, of Johannesburg, a subsidiary of Metabo Germany – which has just purchased four stationary woodworking companies, making Metabo the largest woodworking-tool company in the world – has launched a new product in its cordless range in... 

African concrete supply contracts secured

By: System Author     9th April 1999 CONCRETE products supplier Grinaker Duraset has secured two contracts north of South Africa’s border. In Tanzania the company has completed a contract for the supply of 7 500 m2 of its industrial paving product Stelcon Raft to Protecon for the construction of Trans Africa’s new... 

Concrete industry slump

By: System Author     12th February 1999 THE South African Reinforced Concrete Engineers’ Association (Sarcea) has predicted that tough times lie ahead for the industry. While the 187 000 tonnage achieved during the year ended June 1998 showed a slight improvement on the previous year, Sarcea director Arthur Dubery said the... 

Polymers prevail

By: System Author     5th February 1999 A range of ultra high molecular weight (UHMW) polymers from Poly Hi Solidur South Africa is increasingly used in the concrete- manufacturing industry to line or replace steel and wooden moulds due to its unique non-stick properties. The company’s UHMW polymers are suitable for wet products,... 

Concrete road design methods reviewed 

By: System Author     5th February 1999 In order to make the use of concrete competitive in the construction of all types of roads, the Cement & Concrete Institute is in the process of reviewing the design methods for concrete roads, technical manager Bryan Perrie tells Engineering News. At present the South African market for road... 

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