Permeable concrete block paving taking root

Installation of permeable concrete block paving in the parking area at Wits, showing some of the layers that make up the sub-baseThe biggest of the eight PCBP projects completed to date is the 13 000 square metres car park on the West Campus of the University of the Witwatersrand. Abutting one of Johannesburg’s major thoroughfares, Empire Road, the parking ground comprises a lower section about 6 000 m square metres in area and an upper section of some 7 000 m square metres.

Designed by consulting engineers, Arup, the car park was paved with PCBP to provide on-site stormwater infiltration and attenuation and to avoid additional run-off to the Empire Road stormwater system.

Emannuel Prinsloo, director of the property and infrastructure management division at Wits, says the university opted for PCBP in view of its environmental and stormwater management attributes.

CMA director, John Cairns, says besides the prevention of flooding, PCBP offers environmental benefits such as filtering out of pollutants and the storage of water for reuse.

“The threat of flooding on Empire Road has been avoided and the water that infiltrates beneath the paved surface will replenish the underground water table,” Cairns states.

The sub-base of the PCBP installation at Wits comprises several layers, including re-compacted in-situ soil, a geotextile membrane, quarried stone, a second geotextile membrane, and another layer of smaller stone.

The 60 mm thick concrete paving blocks, with a strength rating of 30 MPa, were supplied by Concor Technicrete. The pavers incorporate vertical slots – 40 mm wide and 3 mm deep – at each end, to allow water to filter through to the sub-base.

Taco Voogt, product manager at Concor Technicrete, says the paving blocks were laid in a herring bone pattern as this is the simplest and most effective system for heavy traffic areas like the car park. Weko Civils was the main contractor, responsible for the earthworks and laying of the sub-base. The paving contractor was Mondo Meccano, a CMA contractor member.

Previous story
keyboard_arrow_upTotal sound control
keyboard_arrow_downTotal sound control

True Sound Acoustics started eight years ago as an installations company, focusing on public address, club and live sound, as well as data projector and lighting installations

Next story
keyboard_arrow_upNew tiles for conference lodge
keyboard_arrow_downNew tiles for conference lodge

Tile Africa Contracts, a tile supplier and contractor and part of Tile Africa, recently supplied tiles for the upmarket refurbishment of the Orion Safari Lodge in Rustenburg. The project involved the design and floor layouts for the hotel's conference areas, entrance lobby, public bathrooms and outside patios. Tile Africa Contracts also supplied the tiles and bathroom ware for the first ten rooms, and will supply a further ten rooms in the second phase of the project.

keyboard_arrow_upHow to pick the right tiles for your bathroom
keyboard_arrow_downHow to pick the right tiles for your bathroom

Despite ever-changing trends, new technologies and evolutions in taste, an overwhelming majority of homes in South Africa feature tiles in the bathroom. So, what makes them such a popular choice? Are they really the best flooring material? And how do you choose the right tiles for your home?

keyboard_arrow_upRosebank Link office development set to be a new steel-and-glass icon
keyboard_arrow_downRosebank Link office development set to be a new steel-and-glass icon

Located in the heart of Rosebank, adjacent to the Gautrain Station, The Zone and Rosebank Mall, Rosebank Link by Redefine Properties is a new office development at 173 Oxford Road. This project will transform the current building into an expressive steel- and glass-clad shell icon. Rosebank Link by Redefine Properties is a new office development […]

keyboard_arrow_upChoose EDT Eurodrain-KESSEL for hospital drainage solutions
keyboard_arrow_downChoose EDT Eurodrain-KESSEL for hospital drainage solutions

Safe and reliable draining from the basement to the roof. Powerful lifting stations take over the complete basement drainage in rooms below the backwater level, and pump wastewater from showers, toilets, washing machines or separators into the elevated public sewage system.