01/04/2025
Today was an anchor/dowel inspection gone wrong. They had used a hollow bit drill, which unfortunately is a manufacturer's approved product, but it is not very effective. I cannot tell people that they cannot use that procedure. I just know it does not clean out the holes in an effective manner.
They had a blower instead of an air compressor, which does next to nothing. I gave up on the idea of checking cleanliness, and we proceded with epoxy. When the rebar was twisted down into the hole, a bunch of muddy water came up in the first hole. Nope. Not a clean hole. I told them that this wasn't going to work. The holes were dirty, and they needed an air compressor to blow them out. It had rained that morning, so concrete dust had turned to mud. They went to the store and bought a compressor.
1.5 hours later, we tried again. They also had some interior anchors. Most of the holes were not drilled wide enough. For epoxy anchor/dowel installation, the hole needs to be drilled 1/8" larger than the rod or the rebar to go in it. That had not happened. If you have to hit the anchor/rebar with a hammer to get it to go into the hole, the hole is too small. Most of these guys were pretty young, so they were learning. But someone should have been directing the work properly. They drilled out the holes and cleaned them again. Sigh. We were almost finished, and the DeWalt epoxy gun battery ran out. Fortunately, someone found another Dewalt battery, and we finally finished. For about five minutes it seemed like no one had another Dewalt battery. That was one problem that I had not encountered before.