THE STINGER

The Stinger electric flex shaft vibrator is rugged, lightweight, and powerful. The 115v electric motor has been designed to run cool with the power and torque to handle todays concrete loads. The stinger attaches to competitor core and casing with quick disconnect adapters.

How To Work With Gfrp Products In Concrete Construction

When working with GFRP composite products, there are some distinctions to be made. Rebar, dowels, and forms are good examples of how working with GFRP differs from working with steel or stainless steel.

Working With GFRP Rebars

The design of the structure and the differences between GFRP and other materials must be considered. For example, you can’t simply swap steel rebar for GFRP. The material properties are different, and these must be considered in the design. Fortunately, there are codes such as the ACI 440 series of documents, which covers design codes, product performance, and quality. The engineers should become familiar with these codes.

Similar to steel rebar, it must be correctly placed and held firmly for the concrete pour. Bars, except those to be placed in vertical mats, should be tied at every intersection when the spacing is more than 30 cm (12 in.) in any direction. Where the spacing is less than this, the bars should be tied at every intersection or at alternate intersections. Ties maintain the position of the reinforcement during the pouring and setting of concrete. They do not need to provide permanent strength to the structure. Always ensure bars do not float upwards and out of position during concrete placement and consolidation. If movement is detected, the pour should be halted whilst additional support or fixtures are added. GFRP rebar can be used and tied in with steel bars. The same tying method as steel should be used in order to achieve the best performance.

Nicks, scrapes, and cuts that do not exceed 5% of the depth of the bar are acceptable. Beyond 5% we recommend the replacement of the bar or using a lap splice on either side of the damaged bar. However, GFRP rebar is not like coated steel rebars, so small surface scratches do not need to be repaired to protect the bars from corrosion; they are corrosion-resistant all the way through.

Due to the nature of GFRP rebar, bends cannot be bent on-site. All bends are factory-made and delivered to exact