The results of the CMA Awards for Excellence competition, announced at a gala dinner function in Johannesburg on 23 April, suggest that advances in precast concrete technology were significant influencers in this year's judging process. The judges had no hesitation in awarding the Aesthetics Commercial Trophy to the concrete cladding of No. 1 Silo at Cape Town's V&A Waterfront. Besides its striking visual appeal, which showcases the beauty of precast concrete construction at its best, the project also involved high levels of skilled precast concrete engineering.
After the project is structured in phases, the project manager has to develop a work plan for it. For the first coming phase, this work plan has to be very detailed. Later phases require fewer details. A work plan shows all tasks that have to be carried out to produce all necessary outputs/services. It describes who is involved in these activities and when each activity takes place. A good work plan also presents the relationships between the different tasks (successors and predecessors). Typical ways of presenting work plans are network plans and Gant charts. Network plans can be presented in two ways:
1. Activity on the arrow (critical path method)
2. Activity in the node (PERT chart). Figures 1, 2 and 3 respectively present the legend for the activity on the arrow chart, an example of a PERT chart and an example of a Gant chart.
In June 2014, eNCA reported South Africa's landfills were rapidly running out of space and the only solution was recycling. They were quite right. With over 108 million tonnes of waste generated by South Africans each year, or between 500 g and 600 g per person per day, on average, the only way to reduce the amount of waste sent to landfill is to reuse or recycle some of the waste generated. Of this solid waste, approximately 60% is carbonaceous material, and just what the doctor ordered. This material can be transformed into electricity, low-sulfur diesel, slag and industrial wax. But, where does it all begin?