Typically, installing rebar in deep, diamond-cored holes is a process required when a structural column needs to be extended. In these scenarios, existing rebar needs to be extended for maximum stability, and an engineer will often specify a very deep hole for this. The best way to achieve these deep holes consistently is through diamond coring, particularly in scenarios where contractors will need to drill through existing rebar as well as cracked or uncracked concrete.

When you're extending rebar through a column, you're usually going to at least glance through another piece of rebar, and the only way to penetrate through this effectively is with diamond coring. However, it's critical to keep in mind that the sides of a diamond-cored hole are much smoother than when using other drilling methods, resulting in less bond surface area. This means that holes often need to be very deep, in order to compensate for this smoothness and achieve maximum bond strength with an epoxy mortar.

This can cause problems and inefficiency on a construction site, which is why Hilti has introduced an innovative product to make the process of installing rebar in diamond-cored holes much easier. This is TE-YRT roughening tool, used in conjunction with RE 500 V3 epoxy mortar. Here’s the operating principle : Rather than drilling deeper to compensate for the smooth sides of a diamond-cored hole, it's much easier and more effective to simply provide each hole with rougher surfaces, and more surface area. This is where the Hilti TE-YRT roughening tool comes in, providing a simple way of creating more surface area for an epoxy to bond to.

Because every construction site is slightly different, there is a variety of different sizes available within the roughening tool range. This means that regardless of hole diameter, contractors can use a matching tool that fits perfectly and roughens the hole without causing any damage and potentially compromising the bond. Using the roughening tool is quick and easy, with the process taking only a few minutes to complete. The tool provides a simple solution that can be relied upon in situations where dependability is critical.’