3.5.3.2
Anchor Installation
Anchors shall be cleaned to remove all contaminants which may hinder epoxy
bond. Epoxy adhesive shall be pressure injected into the back of the
drilled holes. The epoxy shall fill the holes so that when the anchors are
inserted, the epoxy completely fills the holes and excess epoxy is not
exuded from the holes. Anchors shall be inserted immediately into the
holes. The anchors shall be set back from the exterior face at least 25 mm
1 inch. Anchors shall be installed without breaking or chipping the
exposed concrete surface.
3.5.3.3
Cleanup
Excess epoxy and spills shall be removed from the surface of the
excavation. The surface of the excavation shall be left in a clean and
uncontaminated condition. Spills on adjacent surfaces shall also be
removed and surfaces repaired as required.
3.5.4
Mixing Epoxy-Resin Grout Components
Epoxy-resin grout components shall be mixed in the proportions recommended
by the manufacturer. The components shall be conditioned from 20 to 30
degrees C 70 to 85 degrees F for 48 hours prior to mixing. The two epoxy
components shall be mixed with a power-driven, explosion-proof stirring
device in a metal or polyethylene container having a hemispherical bottom.
The polysulfide curing agent component shall be added gradually to the
epoxy-resin component with constant stirring until a uniform mixture is
obtained. The rate of stirring shall be such that the entrained air is at
a minimum.
3.5.4.1
Tools and Equipment
Tools and equipment used further in the work shall be thoroughly cleaned
before the epoxy-resin grout sets.
3.5.4.2
Health and Safety Precautions
Full-face shields shall be provided for all mixing, blending, and placing
operations as required. Protective coveralls and neoprene-coated gloves
shall be provided for all workers engaged in the operations. Protective
creams of a suitable nature for the operation shall be supplied. Adequate
fire protection shall be maintained at all mixing and placing operations.
Smoking or the use of spark- or flame-producing devices shall be prohibited
within 15 m 50 feet of mixing and placing operations. The mixing, placing,
or storage of epoxy-resin grout or solvent shall be prohibited within 15 m
50 feet of any vehicle, equipment, aircraft, or machinery that could be
damaged from fire or could ignite vapors from the material.
3.5.4.3
Epoxy Pressure-Injection of Cracks
**************************************************************************
NOTE: Some jobs may require the pressure injection
of cracks with epoxy-resin grout. In such instances
the following paragraph should be inserted:
**************************************************************************
Cracks shall be pressure-injected using a two component epoxy system with
an in-line mixing and metering capability. System shall be capable of
injection pressures up to a maximum of 1 MPa 150 psi to ensure complete
SECTION 03900
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