Putzmeister displays numerous innovations at BAUMA Shanghai

With new and further developments, as well as products designed especially for the Chinese market, Putzmeister (PM) presents a cross section of its range of concrete pumps, placing booms, wet concrete spraying machines and sophisticated electronic control systems at Asia's largest trade fair for construction machinery (25 to 28 November 2008). Great emphasis will be placed on measures to reduce operating and wear costs.

The BSF 49-5.15 HLS truck-mounted concrete pump will be presented for the first time. Putzmeister has designed the 5-arm placing boom with 49 m vertical reach on a 4-axle chassis. At the front, the machine has the TRDI base structure with telescoping diagonal support that is already known from other PM placing booms in the 40-metre class, and at the rear, it has slewable support legs, which require an amazingly low support extent. On construction sites with limited space, the support system can also only be extended on one side during safe operation, which also significantly reduces the space required (OSS position). The pump aggregate with high-volume delivery cylinders (250 mm diameter, 2,100 mm piston stroke) is designed for delivery rates up to 150 m?/h with only 24 piston stroke changes per minute. This means increased smooth running and lower wear to the entire machine.

Putzmeister will also be presenting the truck-mounted concrete pump models BSF 46-5.15 HLS and BSF 42-5-5.15 HLS, with the proven TRDI base structure including space-saving support system. The placing booms, with a vertical range of 46 m resp. 42 m, are equipped with state-of-the-art 5-arm technology. These machines' high-volume pump unit is equivalent to the large PM truck-mounted concrete pump with 49-metre boom. What is new on the BSF 42-5.15 HLS, however, is the truck superstructure on a 3-axle chassis.

The Putzmeister truck-mounted concrete pumps with 49 and 46 metre booms presented in Shanghai are also equipped with the Ergonic Pump System (EPS). EPS monitors the concrete pump unit fully electronically during operation. This allows Putzmeister to harmonise pumping data such as concrete pressure, hydraulic pump delivery rate, hydraulic pressure etc. to the optimum. The benefits of this are a notedly quieter pumping process, reduced wear, lower fuel consumption and fewer noise emissions.

With the PUMI 26.67 S, Putzmeister is appealing particularly to Chinese ready-mixed concrete works that want to expand their pump fleet with smaller machines. With the PUMI, only one machine operator and one machine are required to transport, mix, pump and distribute the concrete. Using the PUMI is worthwhile in particular for smaller volumes of concrete and when the construction site frequently changes. The PM PUMI displayed at "BAUMA Shanghai" is a combination of a truck mixer with a 7 m? capacity drum, a concrete pump with a delivery rate of 67 m³/h or 75 bar pumping pressure and a boom that can place concrete at a height of up to 26 m.

Also on display is a MOLI truck-mounted concrete pump ("mobile line pump"). Putzmeister designed the MOLI 2109 to convey concrete through long, anchored pipelines, and therefore did not include a placing boom in the pump's design. Typical MOLI uses include concreting in building construction as well as pumping through horizontal pipelines across distances of several hundred metres, e.g. to reach awkwardly located construction sites. Distinct benefits of the MOLI are its high pressure pump unit, compact dimensions and ability to change location quickly.

For lengthy concreting procedures from a single location - e.g. in building construction projects - stationary concrete pumps are preferred, with a stationary boom then taking over concrete placement in the upper levels. At "BAUMA Shanghai", Putzmeister is presenting two stationary concrete pumps with different performance characteristics: firstly, the re-designed BSA 2108 HD. This machine is designed for a maximum output of 74 m³/h, and can pump concrete at pressures of over 150 bar. The second stationary pump type presented by Putzmeister is the BSA 2110 HP D. Its characteristics, at 102 m³/h or a maximum of 220 bar delivery pressure, are significantly higher. For safety reasons, particularly pressure-resistant ZX pipelines that are permitted for concrete pressures up to 250 bar are used when concreting is carried out with these pumps. Incidentally, a machine presented at "BAUMA Shanghai" (model BSA 2110 HP D) pumped concrete of property class C50 to a height of over 450 m on the world-record-holding Burj Dubai construction site. A modified Putzmeister super high pressure pump then completed concreting at a height of 606 m.