Construction World January 2019

PRODUCTS & SERVICES

ASSISTING AT Reddam College

Fibertex South Africa – local distributors for the German-manufactured Naue Geosynthetics range of Geogrids – supplies durable PET (polyester) and PP (polypropylene) high-strength reinforcement Geogrids for all civil engineering applications, including mining, environmental, infrastructure and marine engineering projects. “F ibertex South Africa has partnered with Brent Corporation, approximately 9 000 m³ of backfill material. The project is due for completion at the end of 2018.

assisting with the technical support, supply, installation and quality checks for the retaining walls being installed at the new Reddam College located in Ballito, North of Durban, KwaZulu-Natal,” says Meera Govender, Technical Sales Engineer, Fibertex South Africa. “Construction of these retaining walls required extensive earthworks, in order to execute the exact design heights and levels required. “The retaining walls (140 m x 5,5 m high and 100 m x 6 m high, with inclinations varying from 75° to 83°) were constructed along the perimeter of the new car park and swimming pool. The design called for the reinforcement of the modular segmental block retaining system, as well the drainage thereof.” All retaining walls were constructed with compacted soil layers reinforced with Secugrid® 80/20 R6 polyester geogrid. Embedment lengths varied from 4 to 6 m. The largest wall (140 m x 5,5 m average height) composed of 10 individual layers of geogrid. A total of 6 000 m 2 of geogrid (including approximately 725 m length of the 2 m wide Flexidrain composite drainage system) reinforced

Secugrid is designed to strengthen naturally unstable soil and subgrades, so that the composite soil structure is able to withstand the required loading conditions, through both an interlocking and frictional effect, with little or no movement in the overlying soil materials over the structure’s lifetime. This robust reinforcement material is also highly resistant to biological and chemical degradation, as well as installation damage. Secugrid is supplied in rolls and is quick and efficient to install, with minimal demand on labour resources. Secugrid is manufactured from extruded monolithic PET or PP strands that are drawn to orientate the polymers into high- tenacity flat bars to achieve a high modulus i.e. high strength at low elongations. This feature, combined with the Naue patented welding technology, provides a structurally sound and stable geogrid. Furthermore, the surface of the bars are embossed, inducing additional frictional interaction with the soil. This enables the Secugrid to pick up the load transfer quickly, through both an

interlocking and frictional effect, with little or no movement in the overlying soil materials. Flexidrain is an extruded high density Polyethylene (HDPE) Geonet, covered with a Fibertex F-25 Polypropylene (PP) staple fibre non-woven geotextile jacket, to form a wick-drain Geosynthetic composite. The subsoil water will be led to a front collector drain behind the toe of the retaining wall and discharged into Fibertex Drainex DN110 drainage pipes, which are also chemically inert. Other Naue Geosynthetics products available locally from Fibertex include Bentofix Geosynthetic Clay Liners (GCLs), which are composite materials, designed for use as efficient sealing barriers in various applications, including landfill projects . 

CORDLESS IMPACT DRIVER DRILL KIT L ike all Makita’s 18V cordless range of tools, the 13 mm DHP482Z Impact Driver Drill has been engineered using the latest technology. The DHP482Z is both lightweight and compact, with variable speed delivering up to 28 500 impacts per minute. It has an electric brake, reverse, drill mode and 21 torque settings with a maximum fastening torque of 62 Nm. The single sleeve keyless chuck allows for easy bit installation and removal. Charging time for 3 Ah battery is 22 minutes. The kit includes the Cordless DHP482Z Impact driver drill, two 3.0Ah 18V LXT Lithium-Ion Batteries and the DC18RC Fast Charger, all in a handy carry case. 

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CONSTRUCTION WORLD JANUARY 2019