Putz spray kit anchors walls

Thai contractor, Ch Karnchang, is using two small, hydraulically controlled Putzmeister P 715 TD piston pumps on the US $830 million (LAK8.3 trillion) Nam Ngum 2 hydroelectric dam project in Laos.

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Thai contractor, Ch Karnchang, is using two small, hydraulically controlled Putzmeister P 715 TD piston pumps on the US $830 million (LAK8.3 trillion) Nam Ngum 2 hydroelectric dam project in Laos.

The two spray concrete pumps are being used to anchor the hillsides – to prevent landslides – before the valley is flooded.

The P 715 TD model is equivalent to the earlier BSA 702 D PM fine concrete pump and achieves a pump output of up to 18 m³/h.

 

The P 715 TD pumps have a piston stroke of over 700mm, a delivery cylinder diameter of 100mm and are driven by a 30kW diesel engine. The maximum grain size in the concrete should not exceed 16mm with this application. The solution for cleaning the actual core pump and hopper is exemplary: through the side-mounted flaps on the upper section of the hopper, there is access to all areas that have come into contact with concrete by the time pumping is over.

The reservoir dam project essentially comprises a 169m-high arch, a hydroelectric power station with an output of 615mW and two 1km-long head race tunnels, each measuring 12m in diameter. The project is scheduled for completion in 2011.

In Laos, the harnessing of waterpower to generate electricity is playing an increasingly important role. The country needs the electricity not only to supply its own population and domestic industry on the one hand, but also to export it for currency earnings on the other. The income earned will mainly be used to fund the expansion of the Laotian infrastructure. The main consumer of the power supply is neighbouring Thailand, which has been supplied with electricity from the Nam Ngum 1 water power station since 1971.

Ch Karnchang, based in Bangkok, operates a small fleet of PM machines: in addition to the two P 715 TD fine concrete pumps, the firm also works with three S 5 mortar pumps, a large BSA 2110 HP-D high-pressure concrete pump and a MXR 32 stationary boom.

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