Resin
for threaded bar and screws, for fixing into walls and floorsSummary:
Fixing to masonry with ResinsFixing
brackets for shelves, curtain poles, picture rails, dado rails and anything that
requires drilling into masonry or concrete, requires a few special fixing techniques.
In some cases plastic plugs will not work - usually because the masonry is too
soft, is cracked, or is too hard to drill. In these cases Resins can be used to
achieve load carrying support that direct fixing cannot provide. Resins spread
the load across the resin contact faces, distributing the forces and therefore
reducing the load per square mm of wall. To
penetrate most masonry surfaces you will need an electric hammer drill of at least
500 watts. Masonry drill bits with a flat cutting section at the end, which is
slightly wider than the shaft of the drill bit, allow the tip to cut whilst the
drill dust escapes through the spiral and out of the hole. If
you have a large hole to drill consider drilling a smaller 'pilot' hole first,
or change to a Diamond tipped core drill. Diamond core bits can be hired and for
many concrete drilling jobs are the best answer when the hole diameter exceeds
25mm.
How
to anchor threaded bar using resinsSee
all the materials for anchoring threaded bar in our Resins
Shop. 1. Drill the
hole. Allthread bar, or 'studding' as it is called, is available from us in 8,
10, 12, 16, 20, 25 and 32mm diameters. We can cut this threaded bar for you to
any length. It is either Zinc Plated or Stainless Steel, in High Tensile Grades.
Dowels, for reinforcement or joining can also be supplied in the same studding
materials, or in epoxy-glass. Allow a minimum oversized hole diameter of the bar
diameter plus 2mm. A larger oversize does not reduce the strength of the fixing
- in fact it may increase the pull out resistance. Consider first how the bar
will be held in the centre of the hole whilst the resin sets. 2.
Clean the hole thoroughly to remove all dust and loose material. We stock bottle
brushes, or you can blow out the holes using our small 'puffer' pump, or use an
Air Compressor. Wear eye protection and a dust mask. 3.
Inject resin using a skeleton gun fitted with one of our extension tubes, sized
to reach the bottom of the hole. Inject gently, slowly removing the tube from
the hole, to deposit resin. 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 us at 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 or 400cc skeleton
guns, which are used with the Thixotropic Epoxy
Resins, 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 used for anchoring barsThere
are two main families of resins: 1.
Hand mixed 2. Mix in the
nozzle These are available
in fast (3 - 6 minutes - Thixo Rapid Resin),
medium (15 - 30 minutes - Thixotropic Epoxy
Resins) and slow setting (4 - 6 hours - Slow Set Thixotropic
Epoxy Resins) formulations in three main pack types; A.
Single cartridge tube - no hand mixing
is required because the two resins are inside the cartridge tube in two plastic
bags. Thixo
Rapid Resin, fits standard skeleton guns and the two parts of the resin mix
in a spiral nozzle, which can be cheaply replaced if the resin hardens before
the tube is exhausted.
B.
Single cartridge tube - hand mixing is
required in the larger Base component pot and the cartridge tube supplied (400cc)
fits a standard skeleton gun. Thixotropic
Epoxy Resins, the two resin parts (Base + Activator) once mixed are simply
pushed into an empty cartridge using a 'grease pot' type pusher plate, which is
supplied with the Cartridge Kit.
C.
Dual cartridge tube - no hand mixing
is required because the two resins are supplied inside twin plastic tubes which
are linked together.
Dual cartridge tube resins requires
a specific skeleton gun depending on cartridge size and mix ratio - resins mix
in a spiral nozzle, which can be cheaply replaced if the resin hardens before
the tube is exhausted.
D.
Pouring Resins - paddle mixing
is required, normally carried out in the larger Base component pot, to thoroughly
combined the two, or three parts of the resin formulation. Structural
Pouring Resin is similar to smooth porridge in consistency and is used for
holes larger than 20mm in diameter. Because of the pack sizes it is more economic
in terms of mixing time and cost than cartridge resins.
Fixing
timber battens to Masonry with ResinClean
the wall surface to remove all loose material, paint, varnish and plaster. Mark
around the batten onto the wall with a pencil and then coat the back of the batten
and the marked wall area with Thixo Rapid
Resin. This mixes in the nozzle and sets in 3 - 6 minutes. Press the batten
onto the resin and hold for a few minutes (or prop) until the resin begins to
set. You can then use the batten to provide a base for nails or screws, to hold
your cupboard or radiator, for example. If
you need help with any type of bonding or fixing product Property Repair Systems
will be pleased to give you completely free, no obligation advice on 01626 331351.
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Repair Systems T:
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written by: David
Moore David Moore,
B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author Google+
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