Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.
Issue link: http://concrete.epubxp.com/i/114208
INNOVATIONS VIBRATOR MOUNTS The Stik-It uses a powerful venturi air system to create positive suction tightly securing the vibrator to the concrete form for performance and vibration transfer. Using the Stik-It mount eliminates the need to purchase and install permanent vibrator brackets. The unit suits most traditional concrete forming systems and is reportedly the first external vibrator solution that can be effectively used on lightweight systems including insulating concrete forms, cardboard, styrofoam or polyethylene. The Stik-It can even be mounted to curved surfaces such as column and footing forms. Engineered for use by a single operator, it is portable, versatile and as easy to use as a traditional poker-style internal concrete vibrator, but has the enhanced consolidation and finish quality of an external concrete form vibrator—especially when there is heavy rebar. The STKIT906WALL and STKIT906AMWALL are specially designed for use on concrete wall systems. Both the standard and AirMiser versions pair with the manufacturer's SVRFS-4000AL—the most popular concrete form vibrator. Available in three sizes, the Stik-It vibrator mounts require 80 psi and draw just 8 cfm. The vibrator is independently powered from the mounting system, hence the Stik-It line is compatible with pneumatic, electric, hydraulic and dc powered vibrators. STKIT906WALL with SVRFS-4000AL Vibrator STKIT906 with US-450TAL Vibrator and SC-2 safety cable WWW.CONCRETEPRODUCTS.COM DOOSAN INCREASES DL250 LOADER POWER, PERFORMANCE The upgraded interim Tier 4-compliant (iT4) DL250-3 offers several improvements that enhance productivity and comfort for moving materials in infrastructure and building projects. The newest design of the 3.7-yd. wheel loader has 172 hp, up from 163 hp. It is engineered with a breakout force of 27,120 lb., a full-turn tipping capacity of 20,680 lb. and a dump height of 9 ft. 2 in. For those requiring additional dumping capabilities, the DL250-3 is also available in a high-lift configuration, extending the dump height 18-in. above the standard DL250, to 10 ft. 8 in. The new auto-idle feature provides additional noise reduction and fuel savings by reducing the working idle of the wheel loader from 950 rpm to a standby idle setting of 750 rpm when the machine is inactive for a short period of time. The DL250-3 offers operators the ability to set upper and lower limits for both the lift arm and bucket stop positions from inside the cab. Better lifting capabilities improve cycle times in digging and loading applications, while providing better control of the lift arm and bucket positions. An optional fourth spool control valve provides operators the capability to utilize an attachment that requires an additional hydraulic function. Additionally, service intervals on the front lift arm pins have increased fivefold—from 50 to 250 hours—reducing operating costs and downtime. Tilt cylinder hydraulic hoses have been rerouted for improved hose reliability, better hose movement and improved visibility to the attachment. To keep the wheel loader running at optimal performance in dirty and dusty conditions, the DL250-3 incorporates a new automatic-reversing cooling fan. The operator can manually reverse the fan via a switch, or set it to automatically reverse on a preset time frame. Each time the fan reverses, it runs for a few minutes to clean the cooling system, resulting in longer working hours and shorter maintenance time. Operators can also expect upgraded driving performance options. As an alternative to the standard limited slip differential, the DL250-3 offers an optional hydraulic locking front differential. Based on ground conditions, the operator can choose to lock the differential manually with a floor-mounted foot switch, or allow the machine to automatically engage the system. This provides increased driving power when one wheel spins or loses traction and improves machine performance when navigating tough terrain. The model is equipped with a 6-cylinder DL06 diesel engine that has been optimized for use with cooled exhaust gas recirculation system, diesel oxidation catalyst, and diesel particulate filter (DPF). The 360-cu.-in. engine features a high-pressure common-rail design with direct fuel injection, electronic control and four valves per cylinder. The rail system increases the efficiency of fuel delivery via increased pressure, which in turn allows the injector to deliver a finer mist into the engine. The result is more efficient combustion, leading to more torque and improved fuel economy, less noise, lower operating costs and cleaner exhaust. Interior cabin improvements also include a number of multi-function display panel upgrades on a centralized monitor that allows the operator to view comprehensive machine system information. A key exterior cabin improvement is lowered front side glass, providing improved visibility of operations. The DL250-3 is covered by a 48-hour parts guarantee, where by if a "machine-debilitating" part is needed, Doosan will deliver it directly to the end user within two business days or pay for a replacement machine rental. MARCH 2013 | 43