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Readymix concrete

Readymix overview

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Introduction to Holcim

Holcim (South Africa) (Pty) Ltd have long been established as the leading supplier of raw materials to the

building and construction industry in South Africa. Holcim products, including Cement, Aggregate and

Readymix concrete, are the building blocks of society and the structures in which we live and work. Our

Vision is to be the leading supplier within our industry, creating value for all shareholders, our employees

and the communities in which we work. At Holcim we are proud to deliver products within a framework

of sustainable development. By conducting environmental impact studies and employing environmentally

friendly production processes, we endeavour to optimise the recovery of natural resources and the use of

by-products to sustain natural resources.

About Holcim Readymix ConcreteHolcim Readymix products are available from over 30 Readymix plants in Gauteng, KwaZulu-Natal and

the Western Cape allowing builders, developers, architects and engineers to use Holcim expertise in

computerised weightbatching, concrete pumping services, technical backup and quality assurance backed

by 30years experience in the Readymix concrete market.

Holcim are the supplier of choice for Readymix concrete.

Holcim cater for projects ranging in size from the smallest DIY home application to the largest

construction projects.

Holcim is committed to quality products and service excellence.

Holcim have the largest range of well equipped pumps for all your pumping requirements.

With300trucks on national roads, we have the most comprehensive lorry owner driver (LOD) fleet in

South Africa.

Holcim have a SANAS accredited R & D laboratory.

Holcim have ISO 9001certification.

The advantages of using Holcim Readymix concrete are:

Holcim have the resources and technical expertise to provide a wide range of mixes and to match the

right mix design to the right application.

Holcim are able to meet changes to the construction programme within 48hours.

Holcim Readymix Concrete can be supplied to several positions in one delivery.

The speed of discharge of the Holcim Readymix concrete on site, has become a great benefit in todays

tight construction deadlines.

Holcim Readymix Concrete is cost effective.

Holcim take responsibility for the quality control of concrete production.

Holcim provide technical solutions to construction problems.

Benefits of Holcim Readymix Concrete

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Holcim Readymix branded product range

Application Brands:

Speciality Mixes:

Flowcrete, Poolmix, Hydrafil and Trenchcrete

Mixed Right. Delivered On Site!

Readymix overview 3

Post Tension

Mix

Normal concrete and customised mixes

In addition to our range of branded readymixed products, Holcim Readymix produces concretes to specific

mix designs, and also designs customized mixes to solve the unique problems of the designer, builder and

owner.

Holcim Readymix has successfully designed and delivered.

70MPa pumped concrete for the Lost City at Sun City.

Special ballast mix pumped into ships for stability.

Rollcrete (RCC) for roads, parking lots and dam walls.

Steel-fibre-reinforced low shrinkage flooring.

Heavy-weight concrete for shielding X-ray rooms.

Highly flowable concrete for the Nelson Mandela bridge.

Holcim Readymix has a technical team which finds solutions for specific applications such as

high-performance concrete for high-rise buildings, exposed aggregate for architectural finishes, porous,

heavy-weight and light-weight concrete. This service includes research and development, optimisation of

mixes and on-site technical advice relating to concrete technology.

The more workable or the higher the slump of the

concrete mix, the easier it is to place, compact and finish.

This will relate to the application or available equipment.The two slumps traditionally used are: 100mm and

125mm. All of the brands may be manufactured in any

of the strength categories. However, all have an optimal

mix, based on performance and economics.

Workability

100mm 125mm 150mm

StrengthGain(MPa)

Workability : Slump (mm)

Post TensionMix

Enhanced

Standard

Rapid

7 8 9

4 5 6

1 2 3

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Readymix overview4

Holcim performance based concrete is aimed at ensuring the best product solution, cost effectively. This is

achieved by ensuring that the concrete gains strength at a suitable rate for the application. Shown below is

a typical 25MPa concrete strength gain curve depicting the three differential strength gain options which

provide the basis for strength gain solutions.

General strength gain curve and performance matrix

Shown below is a typical 30 MPa Post Tension Mix strength gain curve showing the expected MPa

achievement over the 28day cycle. Rapid strength gains is required in order for Post Tension Mix to achieve

the 3day hurdle, and allow for tensioning of the slab.

No. of days

0

MPa

5

10

15

20

25

30

1 3 7 14 28

Typical minimum 28-day strength curve for Post Tension Mix

27

18

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Readymix Plant Locations

Gauteng Mpumalanga KwaZulu-Natal

Alrode Evander CoedmoreEikenhof Middelburg LadysmithFerro Witbank NewcastleJukskei OttawaKwagga MgeniKya SandsNancefield NorthWest Western CapeOlifantsfontein Brits BellvilleRosslyn Marikana City

Scoop Rustenburg PhilippiSpartanTechnikon BotswanaVanderbijlpark GaboroneVereenigingWadevilleWynberg

Contact the regional office in your area for Sales or Technical Services

or any other information.

Gauteng: 0860 200 500 (011) 670 5777KwaZulu-Natal: 0800 313 151 (031) 460 9000Western Cape: 0860 009 114 (021) 689 9114

Botswana: 0926 73500172 (Tel) 0926 73500173(Fax)

www.holcim.co.za

May 2004

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