IMIESA May 2022 49 WHO’S WHO IN CEMENT & CONCRETE succeeded in also measuring media with poor reflection properties more accurately and easily. The high focusing also helps better differentiation of the actual measuring signal from the interference signal in containers with a lot of installations. With a measuring range of up to 120 m at an accuracy of ±5 mm, there are enough power reserves even for unusual applications. These seemed to be ideal conditions for the difficult measuring environment. One also has to know that the opening angle of the radiated radar energy and the focusing therefore depends on two factors: the transmission frequency and the active antenna area. As a result, much better focusing is achieved with a higher frequency and identical antenna size. The VegaPuls 69 operates with a transmission frequency of 80 GHz and an antenna size of around 75 mm. This achieves an opening angle of only 3 degrees. In a radar sensor with 26 GHz transmission frequency, the opening angle at the same antenna size is about 10 degrees. The 80 GHz beam also goes past installations or deposits on the container wall. This makes the measurement safer and more reliable. The measuring instrument itself is made from the robust PEEK material, which has a high temperature and chemical resistance. The lens antenna is also insensitive to deposits and dirt, and shows no signs of wear. To simplify commissioning, an intelligent swivel holder was also developed with the aid of which the sensor can be aligned quickly, easily and optimally. To get the optimum angle of tilt for the installation of the measuring device, a smartphone is simply placed on the device so that the sensor can be aligned quickly and optimally with an app. No loss of transmission signal The Vegapuls 69 radar sensor has very good signal focusing and a high dynamic range. The 80 GHz penetrates the dense cloud of dust. Since the sensor has a purging air connection as standard, this can be cleaned quickly at any time so that any deposits ‘deal with themselves’. Despite the interference signals that could not be totally avoided due to the surrounding metal particles, an almost exact level measurement is achieved. A remote display is located prominently at eye level on the silo to avoid the service team having to climb on to the silo during maintenance. It gives the service team an overview of all the data at all times. The trucks deliver the alternative fuels to the cement factory around the clock The fuels must be processed before firing so that the processes run uniformly later and the same calorific value is consistently achieved
PROFESSIONAL AFFILIATES IMESA IMESA AFFILIATE MEMBERS
IMIESA May 2022 51 VEHICLES & EQUIPMENT 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] 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] Makhaotse Narasimulu & Associates [email protected] Malani Padayachee & Associates (Pty) Ltd [email protected] Maragela Consulting Engineers [email protected] Mariswe (Pty) Ltd [email protected] Martin & East [email protected] M & C Consulting Engineers (Pty) Ltd [email protected] Mhiduve [email protected] Much Asphalt [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] Sembcorp Siza Water [email protected] Silulumanzi [email protected] SiVEST SA [email protected] Sizabantu Piping Systems (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] Syntell [email protected] TECROVEER (Pty) Ltd [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] WSP Group Africa [email protected] Zutari [email protected] One of the South Africa’s largest suppliers of compaction machines, ELB Equipment, has released a redesigned model of the ever popular and versatile Ammann ARW 65 walk-behind roller. The updated Ammann ARW 65 provides two-in-one capabilities that make it the perfect fit for every construction company. The dual-amplitude machines are favourites due to their ability to switch from high-amplitude settings for soils and aggregates, to lower amplitudes for asphalt and bituminous materials. “While maintaining its core functions, with optimum compaction power and climbing ability, the redesign on the Ammann ARW 65 includes further improvements on the ergonomics, including an improved handle with soft controls and an automatic parking brake, which prevents the machine from rolling away,” says Keon Kardolus, sales manager: Earthmoving and Construction, ELB Equipment. “Additionally, there’s the height-adjustable guide handle, which optimises operating comfort for operators of any height. The machine now also has a maximum reversing speed that has been reduced to 2.5 km/h, which enables controlled working in reverse mode,” Kardolus continues. A multitasker He adds that the machine’s vibratory system allows for maximum compaction on various applications such as earthworks and asphalt, construction and repair of sidewalks, cycle paths, sports grounds, agricultural and forest access roads. The Ammann ARW 65’s compact design means that it can also be used in confined spaces while still offering maximum productivity. Benefits of the improved design can further be categorised under productivity and serviceability. The machine is fully hydraulic, which enables precise speed adjustment. It also allows for good side clearance, enabling precise working next to walls and kerbs, as well as an integrated sprinkler system that prevents asphalt from caking on the drums. In addition to ELB Equipment’s comprehensive aftermarket service to all its clients across South Africa, the Ammann ARW 65 has simplified maintenance requirements for daily maintenance and does not require special tools. The machine can be driven without wear parts – the fully hydraulic drive system works without a high-maintenance centrifugal clutch and V-belt. • A new water-level indicator that is more visible • Expanded display • The water sprinkling system on/off switch has also been repositioned within easy reach during operation • Bumpers that extend beyond the machine frame for extra protection have been added • Enhanced ruggedness • Improvements on the safety switch, ensuring the machine switches off immediately when necessary (dead man’s switch) • Design ensures that components are discreetly housed to avoid damage • LED lights and outlets are available as optional extras for a telematics control unit – the hardware is essential for tools such as Ammann ServiceLink CAREFULLY CONSIDERED IMPROVEMENTS WALK-BEHIND ROLLER upgrade sets new standard
52 IMIESA May 2022 VEHICLES & EQUIPMENT INDEX TO ADVERTISERS Afrisam South Africa OFC Cement and Concrete SA 46 DataBuild IFC IMESA 2, 4 & 50 Lintec and Linnhoff Holdings OBC Mapei South Africa 25 SABS 12 SBS Corporate Services 29 Specialised Exhibitions/Electra Mining 38 Tecroveer 10 Terraforce 41 The production of reducedtemperature asphalt – also known as low-temperature, warm or warm-mix asphalt – is nothing new. The process was already tested back in the 1990s. However, its application is receiving renewed attention as a proactive response to lowering greenhouse gas emissions. In this respect, Benninghoven’s asphalt mixing plants are playing a key role in rolling out this technology. A key benefit is that reduced-temperature mixtures can be conveniently produced and processed in the conventional manner. The major differentiator is that reducedtemperature asphalt is produced at a temperature of between 110˚C and 130˚C. Hot asphalt, on the other hand, is typically produced at between 140˚C and 180˚C – usually with bitumen at 160˚C as a binder. Reducing the bitumen viscosity Bitumen requires a temperature of at least around 140˚C to achieve good wetting and coating of the aggregates in the mixer. Below this temperature, it remains too viscous.Therefore, to lower the temperature during reduced-temperature asphalt production, the bitumen viscosity must be lowered temporarily. This is achieved by adding water (foam bitumen) or additives. When the hot bitumen is mixed with water, the bitumen foams and the volume increases many times over. The increased surface area enables better wetting of the aggregates in the mixer. This means that the mineral is well coated, even at a lower temperature. High potential for saving energy and CO2 According to the German Asphalt Association, a temperature reduction of just 30˚C results in a saving of 0.9 ℓ of heating oil (or a fuel equivalent) per tonne of finished asphalt. With a daily production of 2 000 t of mixture, this corresponds to a saving of 1 800 ℓ of oil – or up to three quarters of the annual heating energy consumption of a home. The reduction in CO2 emissions is 6 000 kg per day, making reduced-temperature asphalt a highly viable and greener alternative. reduced-temperature asphalt Advantages of Reduced-temperature asphalt can be retrofitted to any asphalt mixing plant using Benninghoven’s Plug & Work principle – via the foam bitumen module or solid/liquid additive feed systems
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Linnhoff was established in Germany in 1919. Apart from being one of the oldest names in the industry, it is also a leading brand of asphalt mixing plants. Word of our quality and reliability has spread as far and wide as the roads paved by the hot mix asphalt produced with Linnhoff asphalt mixing plants over the last century. QUALITY & RELIABLE MODULAR ASPHALT SOLUTIONS