Construction World January 2022

adhesive. SikaWrap®-300 C has a high load capacity, is easy and quick to apply, saving time and money on the project. The Sika®CarboDur ® FRP Design software, a state-of-the- art external structural strengthening design program was an exceptional added benefit. The launching of the bridge from its constructed position to its final position required a perfectly levelled surface. This was achieved by using Sikadur ®-42 ZA, high strength epoxy grout with its high compressive strength and high abrasion resistance. Tests with other products were performed prior to application and Sikadur ®-42 ZA met all the stringent requirements set out by the project engineers. It not only met the levelling requirements but could also be applied in a thin layer, over a wide area, without having any shrinkage or cracking. The high strength cementitious grout, SikaGrout®-295 ZA, was used in several vital applications. This included the grouting behind the anchor plates and jacking frames and to create the permanent plinths for the permanent bearings. SikaGrout®-295 ZA was chosen for its high flow properties that allowed it to be pumped and poured into position. This facilitated a huge time saving benefit to the project. The Ashton Arch project did not only create economic opportunities but also utilised approximately 65 000 person-days and 300 work opportunities for SMMEs, which were created for exempted micro enterprises and qualifying small enterprises (EME/QSEs). Local manufacturers, with support from overseas specialists, were used to manufacture specialised components. The planning extended to

sustainability considerations by recycling the old fabric of the original bridge into the foundation fill of the new bridge. The successful completion of the New Ashton Arch resulted in a proud monument for the region. Furthermore, the manner and techniques used were a first for the country and a wonderful achievement. The New Ashton Arch won in one and was highly commended in two other categories of Construction World's 2021 Best Projects. They are as follows: • AECOM was Highly commended in the Consulting Engineering category • Haw and Inglis Engineering was Highly commended in the Civil engineering Contractor's category • Sika SA won in the Specialist supplier category Sika SA is truly proud and honoured to have been involved in such a unique project.  Consulting Engineer: AECOM SA Main Contractor: Haw and Inglis Engineering Temporary Works Designer: Maffeiss Engineering Launch System Designer: Nyeleti Consulting Concrete Supplier: Afrimat Readymix Cape Specialist Product Supplier: Sika South Africa Support Cable and Prestressing Subcontractor: Amsteele Systems Subcontractor: Allweld Marine & Industrial Subcontractor: Form-Scaff

27 CONSTRUCTION WORLD JANUARY 2022