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UsageFor injection of cracks in
all types of structural concrete elements, masonry, and brickwork.
Suitable for injecting cracks widths from 0.2 - 10 mm. Materials SuppliedQuickmast 105 is available in 1.5 and 5 l packs Coverage
Quickmast 105 is suitable for injecting cracks widths from 0.2 - 10 mm.
Storage/ Shelf Life
Quickmast 105 has a shelf life of 12 months from date of manufacture if stored at a temperature of 25°C.
If these conditions are exceeded, DCP Technical Department should be contacted for advise. StandardQuickmast 105 is suitable for use in contact with potable water when tested in accordance to BS 6920. |
Technical Information
Application InformationDepending on crack width, depth, location, and thickness of the structural element that needs to be injected, many injection techniques requiring different injection tools and equipment may be used. The method of injection given in this Technical Data Sheet is based on most common situation. For more details, DCP Technical Department should be consulted for assessments and advice. SUBSTRATE PREPARATION
The surface of the cracks
should be cleaned from dust, oil, plaster, grease, curing compound and corrosion
deposits. All cracks to be repaired should be cleaned with compressed air. This
should be carried out after drilling of injection holes. Injection Holes Drilling & Fixing Using high quality rotary
hummer drill, and depending on packer diameter used, a suitable drill pit used,
usually 13 mm or 16 mm diameter
mechanical packers are used. The angle which drilling
should be is 45⁰C or less to the surface and toward the crack. Depth of the
drill holes intersecting the crack should be somewhat close to middle of
structure, if possible. Holes
greater than 45 cm are not required even if the concrete being repaired is more
than 90 cm thick. Holes should always be staggered from one side of the cracks
to the other. Spacing: distance between drilled holes usually varies from approximately 15 – 50 cm according to width of the cracks (30 cm is commonly used). Yet the wider the cracks, the further apart are drill holes. Note: If concrete thickness 15 cm or less, do not attempt
angle drilling. Also to minimize concrete spalling, packers will be set into
the face of the crack. Fixing of
Injection Mechanical Packers (Nipples) Packers shall be placed in
drill holes so that top of the rubber sleeve is below concrete surface. Tight
the packer with wrench as much as you can. Mix a small quantity of epoxy
adhesive using Quickmast GPS (Fast set). The mix adhesive should be
applied on the cracks between the injection packers to seal the cracks at a
thickness of 2 – 3 mm and at least 20 – 30 mm extending from both sides of the
cracks. Mixed Quickmast GPS has pot
life = 10 – 15 minutes and 30 minutes cure time at 25⁰C. Injection process can
commence 2 hours after applying Quickmast GPS.
Mix Quickmast 105, resin
and hardener using mechanical slow speed drill when using single component
injection pump. When using 2 components pump, the pump should be should be
charging at 2:1 ratios. Load
the mixed resin and charge the pump, hose and gun Begin injection at point of
highest resistance to ensure good penetration and minimal loss of materials. The
injection is usually starts at the lowest point on vertical crack and at the
narrowest area on horizontal surface. Injection
process will continue until the mixed
resins (Quickmast 105) travelled to next packer. Disconnect and move to next
packer. After
completing two packers, return to first packer and inject again. Continue with
this fashion until crack is completely filled. |
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