e.
Resistance to accelerated weathering, ASTM G 53.
Testing 2,500
hours: No loss in repellency.
f.
Resistance to chloride ion penetration, AASHTO T 259 and AASHTO T
260.
g.
Scaling resistance,ASTM C 672, non-air-entrained concrete: Zero
rating, no scaling, 100 cycles treated concrete.
PART 3
EXECUTION
3.1
EXAMINATION
Examine [concrete], [plaster], or [masonry] surfaces to be treated to
ensure that:
a.
All visible cracks, voids or holes have been repaired.
b.
All mortar joints in masonry are tight and sound, have not been
re-set or misaligned and show no cracks or spalling.
c.
Moisture contents of walls does not exceed 15 percent when
measured on an electronic moisture register, calibrated for the
appropriate substrate.
d.
Concrete surfaces are free of form release agents, curing
compounds and other compounds that would prevent full penetration
of the water repellent material.
Do not start water repellent treatment work until all deficiencies have
been corrected, examined and found acceptable to the Contracting Officer
and the water repellent treatment manufacturer. Do not apply treatment to
damp, dirty, dusty or otherwise unsuitable surfaces. Comply with the
manufacturer's recommendations for suitability of surface.
3.2
PREPARATION
3.2.1
Surface Preparation
Prepare substrates in accordance with water repellent treatment
manufacturer's recommendation. Clean surfaces of dust, dirt,
efflorescence, alkaline, and foreign matter detrimental to proper
application of water repellent treatment.
3.2.2
Protection
Provide masking or protective covering for materials which could be damaged
by water repellent treatment.
**************************************************************************
NOTE: Check manufacturer for items requiring
protection.
**************************************************************************
a.
Protect glass, glazed products, and prefinished products from
contact with water repellent treatment.
b.
Protect landscape materials with breathing type drop cloths:
plastic covers are not acceptable.
SECTION 07190
Page 14
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