MAZIYA AT WORK ON SA’S NEWEST PATHOLOGY LAB

Johannesburg will soon boast one of the most modern forensic pathology laboratories in the southern hemisphere, with work proceeding apace alongside the Helen Joseph public hospital near Auckland Park. Construction is being undertaken by black-owned contractor Maziya General Services, partnering with construction materials leader AfriSam for its supply of readymix concrete and bagged cement

MAZIYA AT WORK ON SA’S NEWEST PATHOLOGY LAB

Johannesburg will soon boast one of the most modern forensic pathology laboratories in the southern hemisphere, with work proceeding apace alongside the Helen Joseph public hospital near Auckland Park.

Construction is being undertaken by black-owned contractor Maziya General Services, partnering with construction materials leader AfriSam for its supply of readymix concrete and bagged cement. When completed in May 2020, the new Johannesburg Forensic Pathology Laboratory will become the main centre for these pathology services in the city. It is being built for the Gauteng Department of Infrastructure Development.

In addition to the laboratories themselves and the related office space, the building will also include educational facilities as training is an important element of the facility’s role. The building therefore includes a double-volume, state-of-the-art auditorium, according to Chris Delport, managing member of Maziya General Services. This will serve the universities in the area, and the nurses training colleges.

AfriSam is the supplier of choice for the supply of the projects bagged cement and readymix requirements

The building’s façade is a Grade 2 smooth concrete finish with no treatment, so care is taken to achieve a uniform colour throughout. To ensure a high quality finish, AfriSam constantly optimises the mixes supplied, says AfriSam territory manager Antonio Benjamin.

As the building is Green Star rated, the concrete being supplied contains slagment as an extender and this reduces the carbon footprint of the product. Standard mixes use 50% slagment, while enhanced mixes use 28%.

A total of over 15 000 m3 of readymix concrete will go into the project by the time it is complete, says Benjamin. Supplied from AfriSam’s Prolecon plant, readymix deliveries began in August 2017 and will continue until the finalisation of concrete work around May 2019. The readymix has been provided in three strength categories – about 260 m3 of 15 MPa for blinding, 10 500 m3 of 30 MPa for the in-situ casting of slabs and 1 300 m3 of 40 MPa for the columns and walls.

15 000 m³ of readymix concrete will go into the project by the time it is complete

 

Earthworks kicked off in October 2017 and continued for about three months, says Delport. Considerable levelling was required due to the slope on the site, with 15 to 20 metres of excavation required.

Following the earthworks stage, extensive piling, to accommodate the stepping on the sloping ground, was done for the four different levels. Over 200 piles – usually 450 mm or 600 mm in diameter – have been driven and poured to a depth of eight to 10 metres. He says that various ground conditions were dealt with, including quartz, hard-scale and sand. The piling was completed by early 2019, and pile caps were then poured on which columns could be constructed.

The building includes a basement at minus 2 level, where there will be parking and service rooms for generators, water plants and heaters. Above the basement, three floors are being constructed, completed with a roof slab. After completion of the concrete work, there will be some limited brickwork with partitioning and aluminium window frames and glazing. Maziya General Services will manage subcontractors and take the building through to full finish, where it can be handed over as a fully functional laboratory.

Between 50-70 young workers from the local area have been employed and upskilled over the project’s two-year construction period

The project is an Expanded Public Works Programme (EPWP), one of government’s key initiatives for providing poverty and income relief through temporary work for the unemployed. The programme provides an important avenue for labour absorption and income transfers to poor households.

We employ between 50 and 70 young workers from the local areas and upskill them over the project’s two year construction period,” says Delport. “This is an important strategy for us to be able to ‘give back’ to the community in the way we conduct business.”

With management, administration and subcontractors on site, there are about 150 people working on the project at any one time, he says. Maziya General Services deploys a range of its own large and small plant on the project, including a tower crane, two mobile cranes, a water bowser, tractor-loader-backhoes (TLBs), excavators, bobcats and compactors.

As the building is Green Star rated, the concrete being supplied contains slagment as extender and this reduces the carbon footprint of the product

Established in 1999, Maziya General Services has expanded its offerings into the broader infrastructural development value chain. With capacity and resources to deliver a range of projects, it holds a Grade 9 rating from the South African Construction Industry (CIDB).

Our multi-disciplinary skills base means that we can offer a single-point responsibility to our clients,” says Delport. “We are known for delivering solutions to clients on time and within budget in a socially and environmentally responsible manner.”

A commitment cast in concrete

A commitment cast in concrete

Hannes Meyer – Cementitious Executive, AfriSam *

In April 2018, at its Peninsula Quarry operations near Cape Town, AfriSam’s top management team re-affirmed it’s long term commitment, further entrenchment and investment of assets and resources in the Western Cape.

AfriSam is renowned for its presence and dedication over decades of construction in the Western Cape, including the supply of cement, concrete and readymix for numerous iconic structures – to the benefit of the City of Cape Town, the Western Cape region and their communities as a whole.

Concrete, after water, is the most used

AfriSam plays an extensive and ongoing infrastructure development role in Cape Town and the Western Cape

product on the planet

With our considerable assets in the region, coupled with our innovative logistics operations in directing clinker from Gauteng to the Western Cape, we are able to maintain our competitive edge and deepen our commitment to Cape Town and the Western Cape,” said Hannes Meyer, AfriSam’s Cementitious Executive.

Richard Tomes, Sales and Marketing Executive for AfriSam

AfriSam’s top management team engage with the medai at the company’s Peninsula Quarry near Cape Town *

Richard Tomes, Sales and Marketing Executive for AfriSam, noted that the company is recognised as the market leader in the combined manufacture and supply of concrete materials, namely, cement, aggregates and readymix.

The AfriSam Peninsula Quarry *

We are aware of the progressive migration of people to Cape Town and the Western Cape, and note too that the turnaround of growth in construction will still take some time, however we have in place comprehensive plans for ongoing expansion in the region – to which we remain historically committed,” continued Tomes.

According to Meyer, AfriSam has in place fully approved and signed-off plans for expansion of its facilities in Saldanha Bay. This programme will build out on its existing limestone quarry in Saldanha with the addition of an EIA approved cement plant to be constructed when market conditions are favourable. “This project will enable significant expansion of all AfriSam products in the Western Cape.

Shaughn Smit, AfriSam’s National Sales Manager for Aggregates

Re-construction of the Silos is well advanced – 2016

Building on Meyer’s presentation, Shaughn Smit, AfriSam’s National Sales Manager for Aggregates, described a number of huge forthcoming developments in the Cape Town region: “AfriSam’s projected commitment programme is in direct support of the published 25 year build plan for the V&A Waterfront – where we continue to supply concrete on a daily basis; the “WES Cape” 25 year build plan (a project similar to Century City) which has already been approved by the City of Cape Town; the “Harbour Edge” development by Amdec which is in the pipeline for the Culemborg foreshore area near the Yacht Club; as well as the “joining of the bridges” which will result in another huge development below the bridges.”

De-construction and re-construction of the atrium progresses apace – 2016

Our finest example of commitment,” said Richard Tomes, “is without doubt our participation with the design of concrete for the iconic Zeitz Museum of Contemporary Art Africa (MOCAA) – the only contemporary art museum in Africa. Here AfriSam sponsored the supply of concrete at cost – and continues to play a key role as a stakeholder through active participation in educational and community programmes revolving around the museum.”

The Zeitz Museum of Contemporary Art Africa (MOCAA) and AfriSam

Project manager, Franette Ventura

A majestic work of modern engineering and concrete art

Originally completed in 1924, the 57 m high Silo dominates the Cape Town skyline.

Constructed by SA Railways and Harbours, the facility processed hundreds of thousands of tons of wheat, maize, soya and sorghum. It was sited to take advantage of its connectivity to the docks and the supporting rail infrastructure. An iconic building, it is considered an important contributor to Cape Town’s urban character.

Custom-built lifts operate inside two of the cut-away silo cylinders – servicing the six floors of art galleries above and providing visitors with a view into the atrium *

According to lead design architect, Thomas Heatherwick of the famed Heatherwick Studios in London, “We expected a rather cold surface inside the museum, but as we began to work with portions of the old concrete, we realized that it imparts a rather unique character to the building inside – a rather warm one at that.

Inside we were in danger of losing the extraordinary cellular structure, so we created a space that would help the visitor understand the building. So, you would walk in and navigate around. We took the idea of taking just one of those billions of grains of corn so that we could scale it up and use it as a model for the cutting tool to cut through.”

The cut through the concrete of the silo wall must be “like a knife through butter” – Thomas Heatherwick, architect

“like a knife through butter”

A core concept in reinforcing the strength of the remaining silo tubes so that they could be left in place and cut to the architect’s design, is the use of an inner concrete ‘jacket’. Using concrete supplied by project partner, AfriSam to engineer’s specification, the inner circumference of each silo tube was re-lined with 200 mm thick reinforced concrete to its exact cut dimension.

The top of the bins is capped with a glass roof which lets light enter the atrium from above. The bottom of the atrium is formed by graded steps that naturally contour the rounded space forming a flexible amphitheatre space that can be used for both events and displays.

In addition, a rooftop floor is dedicated to a restaurant, an education centre and a rooftop sculpture garden. It is from this level that visitors may embark on their ‘walk of faith’ across a high-performance glass floor that looks down into the atrium. Visitors arrive on this level by using one of two scenic lifts. These lifts operate inside two of the cut-away silo cylinders – with a view into the atrium. A third adjacent partly cut-away silo provides the third panoramic option – a steel spiral staircase. There are also conventional service lifts and the usual fire escape staircases, in line with standard building safety requirements.

There be Dragons in the Atrium

A spiral staircase winds up six floors to the rooftop *

This museum is a symbol and an icon of the confidence we feel about being Africans, the confidence we feel about our place in the world” said Mark Coetzee, Executive Director and Chief Curator.

 

Deep in the basement are the original silo grain release valves *

* Photos: John Thomé

Acknowledgements: Gareth Griffiths – extracts on Zeitz Museum

Tri-Star works with AfriSam on top-drawer Infinité apartments

As the readymix concrete supplier of choice, AfriSam will supply approximately 17 500 m3 of readymix concrete for the construction of various structures of the Infinité Apartments

Tri-Star works with AfriSam on top-drawer Infinité apartments

A glittering new residential development featuring fluid spaces, transparency and the spectacular use of glass is under construction in the suburb of Bedfordview, east of Johannesburg, with Tri-Star Construction as lead contractor and AfriSam supplying the readymix concrete.

Developed by Fatasy Property, Infinité is a luxury ten storey block of 198 high specification apartments, most ranging in size from 40 m2 studios to 79 m2 two bedroom units. Eighteen of the units will be the exclusive penthouses, complete with double volume areas to further enhance the sense of spaciousness and elegance.

In one of the largest pours that the contract will require, AfriSam delivered and poured 590 m3 for a basement slab during September 2017

Infinité will be the first high rise residential offering in the Bedfordview area, boasting both north facing and south facing apartments. The generous facilities will include two levels of underground parking, meeting rooms, a gym, an outside pool and a club house.

Glass balustrades all around the building and on every floor add to the modern design which, according to the architect Adrian Maserow of AMA Architects, “embodies the ambition of contemporary architecture”. The style is further enhanced by light colours with muted hues of charcoal, stone, brushed steel, oak and iceberg white.

Construction

Numbers of workers on site will peak at about 460, including sub-contractors and their staff

With earthworks kicking off early in 2017, Tri-Star Construction was on site to start piling work in May 2017 and full construction activities began in July the same year. The company will take the building right through all the construction phases to final finishes.

We are building in three sections – west, centre and east,” Tri-Star Construction contracts manager Daniel van Jaarsveld, says. “While these are being done almost concurrently, we will advance with the core section – where the lifts are situated – slightly ahead of the east and west sections, which will then follow together.”

The partnership with AfriSam on this project began with the supply of readymix for the over 110 pile caps – each taking between six and nine cubic metres of concrete – and the foundations for the building. AfriSam will supply some 17 500 m3 over the course of the project, according to AfriSam sales consultant Liza Rossouw, supplied from the company’s Prolecon and Spartan plants.

The size of the project also requires substantial quantities of reinforcing steel. Over the duration of the construction period, about 2 700 tonnes of reinforcing bar will find its way into the concrete elements of the structure

Construction of pile caps, columns and basement floors is followed by the transfer slab on the first floor. The concrete specified for the 1,5 metre by 2 metre beams is 50 MPa, while the columns demand 40 MPa strength. In one of the largest pours that the contract will require, AfriSam delivered and poured 590 m3 for a basement slab during September 2017.

The size of the project also requires substantial quantities of reinforcing steel. Over the duration of the construction period, about 2 700 tonnes of reinforcing bar will find its way into the concrete elements of the structure.

Where special concrete mixes are required – such as for the swimming pool deck – AfriSam will create the required mix at the plant and deliver to site. In the case of the pool, the roof and some areas on the first floor where garden areas are planned, a chemical admixture will provide the concrete with improved waterproofing qualities by reducing its porosity.

Concrete quality is, of course, high on our agenda and we test every pour ourselves, as well as make use of the services of a well-respected and independent service provider,” says Van Jaarsveld.

Infinité will be the first high rise residential offering in the Bedfordview area, boasting both north facing and south facing apartments

AfriSam conducts tests for our own purposes,” says Rossouw. “This is a crucial element of the quality control for which we are well-known in the readymix concrete sector, helping customers to safeguard their own standards and effectively manage their risk.”

The main structure will be completed by June 2018, while brickwork will continue until October; about 4,3 million bricks will be laid in the building of Infinité, along with the consumption of 38 000 bags of cement which will be batched on site mainly for bricklaying and plastering purposes. The maximum height of the building is scheduled to be reached in September 2018.

With our focus on the quality of our work and the safety of everyone on site, we place high importance on working with sub-contractors with experience, in whose ability we have the highest confidence,” says Van Jaarsveld. “High quality finishes are non-negotiable in a contract of this nature, as the client and end-consumer will be expecting flawless results in every aspect of their living area.”

The quality finishes include Bosch and Hansgrohe appliances and fittings. Large windows open each living space to expansive surrounding views.

The sub-contractors will be responsible for applying 63 000 m2 of plaster on the walls of the building, all to the high standards expected by the contractor – as well as 180 000 m2 of paint. Numbers of workers on site will peak at about 460, including sub-contractors and their staff.

Among the challenges when building this scale of project in a residential suburb, he says, is the potential disturbance caused by construction noise.

It is therefore vital for us to engage continuously with residents of the area, so that we can do all we can to accommodate them, while maintaining our construction schedule,” he says. “There are particular demands of the building process, however, that can make this difficult. When pouring large slabs, for example, we still need to power float the concrete for some time to achieve the desired finish and this may extend well over normal working hours.”

The main structure will be completed by June 2018, while brickwork will continue until October 2018. The maximum height of the building is scheduled to be reached in September 2018.

What is important, he notes, is to communicate with residents well in advance, and to keep the noise levels as low as possible and within working hours as far as can be arranged.

We work to provide a highly professional and hands-on service to our clients and stakeholders, whether the project is large, small, simple or complex,” says Van Jaarsveld. “We therefore rely on the consistently stringent standard of readymix concrete delivery from AfriSam, as they complement our own commitment to quality, safety and best practice.”

AfriSam may be contacted on: 0800 141 141

SARMA’s game-changing readymix concrete conference 25-26 August

SARMA’s game-changing readymix concrete conference takes place at Misty Hills Conference Centre, Mulderdrift on 25-26 August

To Register now click here

readymixWhether you are a concrete technologist, a readymix plant owner or high flying construction executive it pays to attend this year’s instalment of the Readymix Conference by Sarma and be part of the change that is shaping a new and improved concrete industry.
For the first time the conference will include participation of all other bodies affiliated with concrete in South Africa, including the Concrete Manufacturers Association, The Concrete Institute, Concrete Society, Association of Cementitious Material Producers and the Aggregate and Sand Producers Association of Southern Africa. Along with speakers and exhibitors from within the cement and concrete industries, the conference list will effectively read like the “Who’s Who” of concrete in the country.

Conference“Why it is so important to attend, is so that everyone can gain an understanding of the way the concrete industry is evolving and how partnerships with materials suppliers are going to become key to doing successful business in future. We live in a changed world and it is important that companies, Government and parastatals understand how new technologies and techniques can improve service delivery and the quality of construction in South Africa,” says Johan van Wyk, general manager of Sarma.
The high-powered line-up of speakers includes an in-depth panel discussion between the concrete organisations that will outline the future of concrete in South Africa, as well as comment from cement suppliers and other key contributors to the concrete industry. There will also be talks by respected concrete experts including Bryan Perrie of The Concrete Institute, who will discuss specifications in relation to concrete, Amit Dawneerangen of Afrisam will outline an interesting case study, as well as the evergreen concrete expert Jacques Smith, who will give case studies of concrete in mining applications.
Companies with technical speakers will include Chryso with an in depth technical discussions on getting best out of concrete, Oxyfibre will discuss the possibilities available through the use of structural fibre reinforced concrete, as well as an in-depth technical discussion delivered by the team responsible for concrete work on the impressive PWC Tower that is currently under construction in Midrand. Readymix case studies and projects will also be delivered on behalf of the readymix industry by Johan himself.
Hard-hitting business related topics will include talks by renowned economist, Dr Roelof Botha, analyst Dr Piet Croucamp, futurist Raymond de Villiers, motivator Ian Thomas and a business opportunity discussion will be delivered by Eskom’s Nico Singh, among others. Exhibits and networking opportunities will provide delegates with an opportunity to foster new relationships and nurture new business opportunities.

To Register now click here or contact the office on (011) 791 3327.