Using fly ash in cement solves the problem of the abundance of a waste substance not otherwise utilised. At the same time, it reduces the high energy requirements of cement without compromising its compressive strength.
BUT A LESSER-KNOWN fact is the behind-the-scenes work that is constantly being undertaken by the Southern Africa Readymix Association (Sarma) to ensure that international standards are adopted and used by its members, while simultaneously educating industry bodies and users about the need to insist on accredited readymix. "If South Africa is to progress as a modern society, we need to uphold standards and constantly push the boundaries to ensure we are among the world leaders. We must be able to construct any type of structure with locally obtained skills and materials whenever it is required. We cannot ever settle for anything but the best when it comes to building our nation," says Johan van Wyk, general manager, Sarma.
Despite leading earth moving equipment, pipe and electrical equipment manufacturers, together with suppliers, all reporting a significant reduction in sales over the past year, all is not doom and gloom, comments Quintin Booysen, sales and marketing manager, Pan Mixers South Africa (PMSA).
The Vestas wind farm projects at Grahamstown, Saldanha, Great Kei, Tsitsikamma and Grassridge will see a substantial amount of renewable energy filtered into the national grid, with a subsequent reduction in carbon emissions.
No longer a futuristic dream, smart cities are fast becoming a reality in many countries across the world. Smart cities are founded on the interconnectedness of devices, which communicate and provide information that leads to intelligent automation and decision-making. MOBILE IS FAST becoming the standard method for people to access technology, and this is seen with the ever-increasing uptake of smartphones. According to Pep Stores cellular executive John Edwards, in 2013, 1% of phones sold at Pep Stores were smartphones and, by 2014, 30% of phones sold at Pep Stores were smartphones (a 3 000% increase).