DIY Doctor

WELCOME TO OUR CHEMICAL FIXINGS PROJECT

This project is presented by Property Repair Systems

Summary: Chemical fixings and chemical anchors


If you need help with any type of Epoxy or Polyester Resin anchor, filler or coating problem  Property Repair Systems will be pleased to give you completely free, no obligation advice on 01626 331351. The information you need may be in the Project below, but if not call them for expert, unbiased assistance with building products.

If you need to fix close to the edge of a brick or stone pier because you need to hang a gate or fix a letterbox or nameplate, drilling and using screws and bolts which expand in their associated wall plugs may crack or split the masonry. The way to get over this is to fix using chemical resin injected into a pre-drilled hole. A section, or stud, of threaded bar is then screwed and bonded into the hole. The resin goes very hard, binding the thread to the masonry and leaving a short length of thread sticking out onto which you can bolt your ornament, gate post, bracket or aerial for example. These resin anchors will take massive loads, but preparation is important.

Gate hinge chemically fixed

HOW TO FIX BARS, STUDS OR ANCHORS

Four easy stages complete this operation and all tools and materials are available at www.epoxy-info.co.uk

1. Drill a hole. Studs are generally available in 8, 10 and 12mm sizes. Dowels, for reinforcement or joining are available in high tensile plated steel or epoxy-glass in 6 – 25mm diameters. Masonry drill bits are required for this and you need to allow a standard over-size of at least 4mm on the diameter – an 8mm stud will require a 12mm drill bit and so on. (See www.epoxy-info.co.uk).

2. Clean the hole of dust and debris. Proprietary brushes are available or you can use air, by blowing down a tube (don’t suck, close your eyes and wear a dust mask and eye protection) or using a compressor.

3. Inject resin using the applicator skeleton gun fitted with an extension tube of the correct length and diameter to reach the bottom of the hole. Inject gently, slowly removing the tube from the hole, to deposit resin without trapping air. For accurate, waste free injection pre-mark the tube with tape, so that you can stop operating the trigger when the tape appears. Set the tape at a distance from the tube end to allow for the resin that will be displaced by the bar. (For Help with this calculation ring Property Repair Systems on 01626 331351). Various applicator skeleton guns are available, depending upon which resin you choose. You may already have the basic 300cc and/or 400cc skeleton guns, which are used with the Ultra Thixotropic Range, for example.

4. Mask the threaded stud with electrical tape over the part required to take the nut, to avoid resin contamination, which might block the threads. Take the stud in the gloved hand and slowly rotate whilst pushing it into the resin filled hole. Complete kits are available for resin fixing if you have a lot to do.

TYPES OF RESIN

There are two main types:

  • Epoxies
  • Polyesters

These are available in fast (3 – 6 minutes), medium (15 – 30 minutes) and slow setting (4 – 6 hours) formulations in three main pack types;

  • Single cartridge tube – no hand mixing required - two resins inside in a plastic bag – fits standard skeleton guns – resins mix in the nozzle, inside a spiral, which is replaced if the resin hardens before the tube is exhausted.
  • Single cartridge tube – hand mixing required - fits standard skeleton guns – mixed resin pushed into an empty cartridge using a grease pot type pusher plate.
  • Dual cartridge tube – no hand mixing required - two resins inside twin plastic tubes linked together – requires a specific skeleton gun for each type, depending on cartridge size and mix ratio – resins mix in the nozzle, inside a spiral, which is replaced if the resin hardens before the tube is exhausted.
Aplicator Gun

Property Repair Systems will provide free of charge calculations and designs for all types of repairs using resins in conjunction with threaded bar, rebar and epoxy-glass bar. Consult their experts for anchor bonding, stitching masonry and doweling or pinning. Ring 01626 331351 for Free Help.




Much more construction information is available in our bookstore. All the tools and fittings you need in the toolstore.


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