CEMENT & CONCRETE Whether for new or existing developments, adequate stormwater provision has become increasingly important to combat extreme weather events and flooding, as well as protect general infrastructure. Within this field, precast manufacturer Rocla and sister entity Technicrete (both forming part of the IS Group) continue to field purpose-designed solutions for upgrade, mitigation and repair projects across South Africa. Recent examples within the sanitation field include the supply of Rocla’s rolling joint spigot and socket pipes for flood damage repairs to the main sewer line along Queen Nandi Drive in Durban. In total, around 41.48 m of 1 350 mm diameter pipe was supplied from Rocla’s factory in Roodepoort, Gauteng. Hazeldean Boulevard Various integrated IS Group solutions have also been supplied recently for the Hazeldean Boulevard upgrade, which forms part of the Riverwalk Road Project near Pretoria East. Carried out by Kwa Mhlanga Construction, the project scope aims to reduce traffic congestion between the Blyde and Silver Lakes residential estates, in addition to improving stormwater infrastructure. Rocla supplied 1 564 interlocking joint pipes of varying sizes, while Technicrete delivered close to 7 km of Fig 7 (semi-mountable) and Fig 10 kerbs, as well as 3 500 m2 of Armorflex 180, an articulating concrete block system. Ideally suited for lining trapezoidal channels, a distinctive feature of Armorflex 180 blocks is that they provide a loose, but sophisticated interlocking design. This allows the surface to remain flexible to movement during stormwater or flooding events, safeguarding the overall integrity of the system. PRECAST SOLUTIONS for stormwater AND SANITATION Rocla supplied rolling joint spigot and socket pipes for flood damage repairs to the main sewer line along Queen Nandi Drive in Durban An Armorflex 180 installation Rocla’s interlocking joint pipe is purpose-designed for use in stormwater applications The Cement & Concrete SA School of Concrete Technology (SCT) will be running 10 standard courses in 2023. These range from basic topics such as an ‘Introduction to Concrete’ to more specialised training in various fields including ‘Concrete for Industrial Floors’ and ‘Concrete Road Design and Construction’. All the courses are presented live in Midrand, with some also scheduled for Durban and Cape Town. Continuing Professional Development (CPD) points are awarded for selected courses. On an advanced level, the UK Institute of Concrete Technology’s two highly respected Concrete Technology and Construction courses – ‘General Principles’ and ‘Practical Application’ – as well as the pinnacle of concrete training, ‘Advanced Concrete Technology’, will continue to be offered in 2023. The SCT 2023 Training Programme can be downloaded at www.cemcon-sa.org.za. SCHOOL OF CONCRETE TECHNOLOGY 2023 TRAINING COURSES Plastic film Plastic film is lightweight and available in various colours. However, it should be thick enough to prevent damage during use. White plastic provides substantial reflection of the sun’s rays, whereas black plastic has advantages in cold weather because of its heat absorption but should be avoided in warm weather in exterior placement. The plastic film should be placed over the wet concrete surfaces as soon as possible without marking or damaging the surface, and should be placed so that it remains in contact with the surface during the specified curing period. If not adequately held in place, wind blowing under the film may create a wind tunnel effect, causing severe drying. For flat slabs, the film may be suspended over the concrete surface on battens until it can be placed on the surface without damage. Liquid membrane-forming curing compounds These compounds basically consist of waxes or resins together with solvents of high volatility at atmospheric temperatures. Pure resin and solvent compounds are more effective than those in emulsion. They can be applied by hand or power sprayer; if the project size warrants it, mechanical applications offering speed and uniformity of distribution should be considered. Liquid membrane-forming compounds must be applied after finishing as soon as the free water on the surface has dispersed and no sheen is visible. The application must be done before the compound is absorbed into the concrete. Importantly, pigmented compounds must be adequately stirred to ensure even distribution. Providing they are non-absorbent, the forms can be left in place and this is an acceptable method of sealing during curing. The key aspect to note though is that using steel forms left in place may result in high concrete temperature build-up in summer and very low temperatures in winter. A simple way to get around this is by releasing the forms slightly to allow a flow of water between the form and concrete to prevent such temperature extremes. Observing these and other tried and tested techniques is the key to best-in-class concrete performance and sustainable infrastructure. IMIESA January/February 2023 49
PROFESSIONAL AFFILIATES IMESA IMESA AFFILIATE MEMBERS
LINTEC & LINNHOFF’s AECOM [email protected] AFI Consult [email protected] Alake Consulting Engineers [email protected] ARRB Systems [email protected] Asla Construction (Pty) Ltd [email protected] BMK Group [email protected] Bosch Projects (Pty) Ltd [email protected] BVI Consulting Engineers [email protected] CCG [email protected] / [email protected] Corrosion Institute of Southern Africa [email protected] Dlamindlovu Consulting Engineers & Project Managers [email protected] EFG Engineers [email protected] Elster Kent Metering [email protected] EMS Solutions [email protected] ERWAT [email protected] ESCONGWENI BPH ENGINEERS (PTY) LTD [email protected] GIBB [email protected] GIGSA [email protected] GLS Consulting [email protected] Gorman Rupp [email protected] Gudunkomo Investments & Consulting [email protected] Hatch Africa (Pty) Ltd [email protected] HB Glass Filter Media [email protected] Herrenknecht [email protected] Huber Technology [email protected] Hydro-comp Enterprises [email protected] Infrachamps Consulting [email protected] INFRATEC [email protected] IQHINA Consulting Engineers & Project Managers [email protected] iX engineers (Pty) Ltd [email protected] JBFE Consulting (Pty) Ltd [email protected] JG Afrika [email protected] KABE Consulting Engineers [email protected] Kago Consulting Engineers [email protected] Kantey & Templer (K&T) Consulting Engineers [email protected] Kitso Botlhale Consulting Engineers [email protected] KSB Pumps and Valves (Pty) Ltd [email protected] KUREMA Engineering (Pty) Ltd [email protected] Lektratek Water [email protected] Loshini [email protected] Makhaotse Narasimulu & Associates [email protected] Mariswe (Pty) Ltd [email protected] Martin & East [email protected] M & C Consulting Engineers (Pty) Ltd [email protected] Mhiduve [email protected] MPAMOT (PTY) LTD [email protected] Mvubu Consulting & Project Managers [email protected] Nyeleti Consulting [email protected] Odour Engineering Systems [email protected] Prociv Consulting & Projects Management [email protected] Rainbow Reservoirs [email protected] Re-Solve Consulting (Pty) Ltd [email protected] Ribicon Consulting Group (Pty) Ltd [email protected] Royal HaskoningDHV [email protected] SABITA [email protected] SAFRIPOL [email protected] SAGI [email protected] SALGA [email protected] SAPPMA [email protected] / [email protected] SARF [email protected] SBS Water Systems [email protected] Silulumanzi [email protected] Siroccon International (Pty) Ltd [email protected] SiVEST SA [email protected] Sizabantu Piping Systems (Pty) Ltd [email protected] Siza Water (RF) Pty Ltd [email protected] Sky High Consulting Engineers (Pty) Ltd [email protected] SKYV Consulting Engineers (Pty) Ltd [email protected] Smartlock [email protected] SMEC [email protected] Southern African Society for Trenchless Technology [email protected] SRK Consulting [email protected] Star Of Life Emergency Trading CC [email protected] TPA Consulting [email protected] V3 Consulting Engineers (Pty) Ltd [email protected] VIP Consulting Engineers [email protected] VNA [email protected] Water Institute of Southern Africa [email protected] Wam Technology CC [email protected] Wilo South Africa [email protected] WRCON [email protected] WRP [email protected] Zutari [email protected] Targeting key export markets, Singapore-based OEM Lintec & Linnhoff recently ramped up production at its new manufacturing facility in the state of Johor, Malaysia. Linnhoff containerised asphalt mixing plants and Eurotec concrete batching plants manufactured there are destined for regions that include South-East Asia, the Middle East and Africa. The current facility, which covers an area of 8 258 m2, represents the first of three planned development phases for the 26 199 m2 site. Phase 2 is now underway, adding another 7 140 m2 of factory space. Phase 3 of the development will further expand the open-yard area for storage of stock plant and components, as well as create more space to conduct rigorous testing and erection of multiple plants before they are delivered. The first unit to roll off the production line was a Eurotec ECO60 concrete plant, which was shipped to a customer in Madagascar. The second order was for a Eurotec Ecotec ECT60 concrete plant and a Linnhoff TSD1500 MobileMix asphalt plant, which were supplied to a customer in Papua New Guinea. Malaysian factory now SHIPPING GLOBALLY VEHICLES & EQUIPMENT A section of the Johor factory floor completed during Phase 1 of a three-phase development Lintec & Linnhoff Holdings’ Daniel Chan (left), chairman, and Tan Suan Yap, executive director, performing the groundbreaking ceremony for Phase 2 of the Johor factory in Malaysia Plant assembly in progress IMIESA January/February 2023 51
Afrisam South Africa 2 APE Pumps 41 ARRB Systems 19 Gabion Baskets OFC IMESA 4, 50 & IBC Isuzu Trucks 14 KSB Pumps & Valves 20 Mapei South Africa 17 Megapile 12 Plastics SA OBC Rand Water 29 Sizabantu Piping Systems IFC Zutari 27 INDEX TO ADVERTISERS PUMPS & VALVES KSB Pumps and Valves in South Africa again made its expertise available to local municipalities and water authorities following a fact-finding tour by Emilio de Paz, a KSB global specialist based in Germany, who visited and assessed various plants across the country. The in-depth programme culminated in a two-day conference in Durban between 22 and 23 November 2022, which was attended by delegates that included role players from disaster-hit eThekwini, as well as from further afield in KwaZulu-Natal. Municipal and consulting engineers, as well as specialists from various water and wastewater utilities, were also in attendance. “There were more than 100 attendees with 85 on-site and 24 online participants on day one, with nearly all returning the following day, which indicates the quality of the information shared,” says Hugo du Plessis, acting market area manager: Water, Wastewater and Irrigation, KSB Pumps and Valves. Process optimisation Discussions ranged from general topics to highly technical issues such as water hammer, cavitation and free passage of pumping systems, as well as the design of pump stations and sumps for maximum efficiency and reliability. The findings from operations across the globe – including complex systems in countries like China, Indonesia, and Mexico, among others – were also shared. “Emilio delivered a hard-hitting technical presentation on ‘Wastewater Pump Station Design’ on day one and followed up with an equally informative presentation on ‘Water Transport Systems’ on the last day. This type of knowledge is hard to find and visits like this help us to share knowledge across the country and ensure our customers have access to the highest possible expertise when dealing with water distribution and wastewater issues,” Du Plessis explains. Adds De Paz: “It was a great interaction and it’s clear that our products and services are already well known in the industry. It’s currently a matter of encouraging municipalities and utilities to engage with us to address present and future challenges. “In some instances, big gains can be made with comparatively small changes… in these instances, we can assist with immediate remedial action,” De Paz concludes. KSB shares TECHNICAL INSIGHTS with municipalities Emilio de Paz, global specialist at KSB 52 IMIESA January/February 2023
ABSTR AC TS SUBMITTED BY 10 March 2023 [email protected] | tel +27 031 266 3263 CATEGORIES Contact Melanie Stemmer for an entry form or download it from the website. • Buildings, Structures and Housing • Ecological, Environmental and Social • Financial, Legal and Regulatory • Electrical and Electronic • Water and Sanitation • Transport, Roads and Stormwater t: +27 (031)266 3263 e: [email protected] [email protected] www.imesa.org.za IMESA ORGANISER THE INSTITUTE OF MUNICIPAL ENGINEERING OF SOUTHERN AFRICA (IMESA) CONFERENCE ENDORSED BY ABSTRACTS 25-27 October 2023 86TH IMESA Conference BOARDWALK HOTEL Gqeberha (Port Elizabeth) ABSTRACTS Call for