N2 Bramlin Interchange to Soutwerke, 2016


Rehabilitation of the road pavement layers was undertaken and insufficient drainage issues solved using bidim A2 and A6. The bidim in this project used the equivalent of 201 318 recycled cooldrink bottles.

Loftus Parking Basement, 2016


Adding multiple levels of parking to alleviate congestion, will see plenty of room for rugby supporters in future. The water table needed to be lowered for the basement layer where bidim was used in drainage trenches and as a separation layer between the in situ and aggregate at the base of the surface bed. The […]

Witfontein, 2016


Unsuitable in situ material at the site of this access road – due to a high water table – was excavated and infilled with dump rock. The high strength of bidim A8 and its filtration properties, ensured adequate adequate movement of underground water away from site. The bidim in this project used the equivalent of […]

R75 Uitenhage, 2015


This trapezoidal drain constructed at the top of a retaining structure to assist with the catchment of water whilst directing the flow away from the slope.

Moria Park Limpopo, 2015


A cutting almost always creates a problem with water that seeps into the layer works of the road.  A cut-off trench was dug around the foot of the hill to accommodate for a sub-soil drainage system consisting of bidim A4, 110mm drainage pipes and 19mm stone. This drainage system prevents water running into the layer works […]

Seisa Ramabodu Stadium, 2014


Home of the Bloemfontein Celtics, this stadium field’s parallel drainage system uses bidim A5. The bidim in this project used the equivalent of 80 081 recycled cooldrink bottles.

Silver Lakes Pretoria, 2014


In sports field drainage, a subsoil drain was installed around the perimeter of the field using pipe and bidim A4. The bidim in this project used the equivalent of 3 978 recycled cooldrink bottles.

N4 Kaapmuiden, 2014


This section of road constructed in a valley, has been vulnerable to ground water and consequent damage. Precast concrete cantilever walls were used to retain the imported material for the widening of the road. bidim was installed as a filter fabric over the entire wall area.

N1 Pienaarsrivier, 2014


The median of the highway lies well below the surface level of the fast lanes in both directions and large volumes of water build up in the median and filter into the layer works on both sides, degrading the base which eventually causes cracking and rutting. Installed subsoil drains using bidim A4 in the median, […]

Roma to Semonkong Lesotho, 2014


The Flo-Drain system comprises pipe, bidim (A2) filtration, and a geotextile net.  It was installed as roadside drainage along this 2.5km section.

Greyville Racecourse, 2014


bidim A2 as a drainage layer along the track enhances the performance of the track to world-class standards. The bidim used in this project was produced using 179 189 recycled cooldrink bottles.

Menlyn Maine Mall, 2014


A drainage layer was installed under the floors comprising bidim A2, fine stone, and a plastic layer. Concrete was then cast over this layer. For the basement walls, ZipCore was installed with a toe drain consisting of bidim and drainage pipes. The bidim used in this project was produced using 175 421 recycled cooldrink bottles.

Van Dyksdrift Rd, Middelburg, 2013


Subsoil drainage was installed in deeper-than-standard trenches to eliminate the risk of water ingress into the layer works in this low lying area. The bidim used in this project was produced using over 98 800 recycled cooldrink bottles.

Promosa Landfill, 2013


Constructed over a clay liner, a drainage system using bidim A5 at its base, provided filtration and separation for the removal of leachate. The bidim used in this project was produced using 42 972 recycled cooldrink bottles.

Olivedale Retirement Village Randburg, 2013


To prevent the possible build-up of hydrostatic pressure behind the concrete block retaining wall, a blanket drain was constructed consisting of a layer of bidim A2 covered with a 120mm layer of 19mm stone followed by a second layer of bidim A2.

N5 Harrismith to Kestell, 2013


Severe deterioration of the N5 between Harrismith and Kestell meant rehabilitation was essential. Adequate drainage of base layers can extend the life of the new road and so subsoil drainage alongside the constructed road was critical to ensure the water table was drawn down below the layer works. The bidim used in this project was […]

N1 Wurasoord, 2013


Rehabilitation of this section of road, necessitated the need for subsoil drainage using bidim A4 at the hill cuttings. The bidim used in this project was produced using 106 670 recycled cooldrink bottles.

N1 Ventersburg, 2013


Dropping the road level at this off-ramp for noise and safety reasons meant that ground water levels had to be adjusted for.  A 400mm x 400mm conventional stone drain wrapped in bidim A4 was installed on both sides of the new proposed road as well as the on and off ramps to the town.

Annlin Reservoir, 2013


bidim A4 provides filtration and separation functions wrapped around slotted pipes which form part of a leak detection system. The bidim used in this project was produced using 6 589 recycled cooldrink bottles.

Knots Dump, Swaziland, 2012


bidim A0 was laid as the drainage separator between the liner installer’s filtration system and bidim A8 for the protection layer to their HDPE liner. The bidim used in this project was produced using 1 169 350 recycled cooldrink bottles.  

Transnet Ermelo, 2012


The construction of two new Transnet railway lines adjacent to an existing line encountered subsoil drainage problems and space limitations. A blanket drain with a lateral fin drain were specified instead of a sand blanket drain.  The latter proved problematic as the sand layer was easily contaminated by the fill and the thickness was difficult to […]

Sylvania Metals Tailings Facility, Marikana, 2012


A completely synthetic filter drain system using bidim A6 was specified for this tailings facility as opposed to the traditional sand and stone design and afforded the client significant cost- and time-savings. The bidim used in this project was produced using 18 888 recycled cooldrink bottles.

Moreleta Park Pretoria, 2012


Where a new pipeline would have to traverse wetlands, the trenches were dug far larger than the diameter of the pipes, lined with bidim A6 followed by a thick layer of 19mm stone placed at the base.  The thicker grade bidim would assist in carrying the load of the pipes, forming a reinforced base, and its high […]

N12 Daveyton, 2012


A bidim A4 blanket drain was installed between the backfill layers.

Polokwane Ring Road, 2011


bidim A4 provided filtration necessary behind the gabions at the culverts of the new ring road. The bidim used in this project was produced using 49 729 recycled cooldrink bottles.

Chloorkop Landfill, 2009


bidim A4 and A5 were used in the toe drains, edge drains and as filtration behind gabions during the capping of this facility.

Matimba Power Station, 2007


bidim A6 was used as liner protection and filtration in the storm water collection dam.

Karee Platinum Mine, 2007


As part of the tailings dams, bidim A4 is used to allow water to drain out and be recycled.

Beatrix Mine, 2006


The tailings dams facility at this mine used bidim A4 beneath the graded natural filter layer in a filtration and separation function.

N3 Heidelberg, 2003


bidim U24 used for subsoil drainage in the Harrismith vicinity.

Unilever Building, Umhlanga Ridge 2001


The 500mm wide WickDrain feeds vertically into a collector drain behind the basement section of the building.

Bronkhorstspruit Temple, 2000


bidim A2 used as part of a vertical drain behind a basement wall.

Summerveld Equestrian Track, 1999


When water wasn’t draining off the synthetic section of the track, subsoil drains were installed using bidim as filtration.

Gordons Bay, 1999


Almost the entire 20km section upgraded had new subsoil drains installed.  Strict environmental controls were in place requiring labour intensive methods be used. bidim was used to line the french drains and also as a filter fabric behind all the gabions.

Kokstad Prison, 1998


The blanket drain installed using bidim U34 drains into a conventional sub-soil drain running almost the entire length of the site.

Majuba, 1995


bidim A2 in this rail link subsoil drain.

Ellis Park Athletics Stadium, 1993


A bidim blanket drain was laid in this sports field application.

Phokeng Stadium, 1992


Blanket drain for this sports field application.

Mokolo Dam, 1979


This 57m high rockfill embankment dam uses bidim A8 as an adjunct to the clay core protection filter. Download the case history of this enduring rockfill dam.

Bisasar Road Landfill, 1978


A bidim blanket drain is laid beneath the landfill.

Gonubie, 1976


Roadside subsoil drainage.