Construction World August 2017

CEMENT & CONCRETE TECHNOLOGY

The data obtained from these sensors will contribute to a better understanding of environmental loading on and performance of integral bridges in South Africa and encourage more widespread use of integral bridges. This project is a deserved joint winner of the Fulton Award in the “Innovation in Concrete” Category. Zeitz Museum of Contemporary Art Africa: maintaining the existing structures whilst combining it with innovatively placed new concrete substruc- tures, selective demolition work and recycling make this building a celebration of concrete both as a historical and as a new, innovative building material. Innovative and complex concrete placement and formwork techniques together with a variety of the latest laser-guided concrete-cutting and removal techniques were used. Newly cut and angled edges were polished to expose the original aggregate and steel reinforcement to great effect. This enabled open spaces in which the old and the new stabilising concrete work remain in contrast yet harmoniously fit together. In continuing the theme of paying homage to the silo’s industrial past, the original concrete both externally and internally was cleaned and has been retained as its most visible finish. *Commendation – Pacaltsdorp Pedestrian Bridge *Commendation – PY Track Slab

Mt Edgecombe Interchange Upgrade.

INFRASTRUCTURE Winner – Mt Edgecombe Interchange Upgrade This project showcases the use of concrete in civil engineering infrastructure in that it encompasses 9 new road bridges, 1 new pedestrian bridge, 9 mechanically stabilised earth walls, and 3 soil nail retaining walls. It featured three simultaneous incremental launches with a combined deck length

that exceeds 1.5 km, the longest incrementally launched viaduct in the southern hemisphere, and three incremental launches being constructed simultaneously. This is a South African first. It was constructed under difficult conditions having to deal with maintaining the requirements of the heavy existing traffic demands within a congested site. As a result of the vast scope, the wide variety of engineering disciplines and different construction elements, a total of 41 concrete mixes were designed for this project as well as three different grout mixes and two different sprayed concrete (shotcrete) mixes. *Commendation – Concrete for Maputo Bridge *Commendation – Kusile Power Station Main Civil and Completion Works *Commendation – Mndwaka Dam – Rubble Masonry Multiple-Arch Buttress Dam

Mndwaka Dam.

CONSTRUCTION WORLD AUGUST 2017 42 CO STRUCTIO WORLD AUGUST 2017