| Home
> Featured Project > Pearl
Harbor
Top Deck Repair Procedure
The repairs on the top of the deck centered on the rail slot and
used Sikatop 111 Plus? extended with “pea” gravel (3/8-inch
(1 cm) maximum) aggregate from 50-pound (22.7 kgm) bags. Batches
(10 ft3 (0.3 m3)) were mixed with proportions of one bag of Sikatop?,
0.9 gallon (3.4 l) of component B, and 30 pounds (13.6 kgm) of aggregate.
The mix, which easily met the shrinkage criteria, was designed to
be flowable and self-leveling. After a surface abrasive blasting
using copper slag grit to maximize aggregate interlock with the
repair surface, the repair areas were completely filled with standing
water for 24 hours. All standing water was removed with compressed
air before placement producing a “Saturated Surface Dry”
(SSD) condition and a “neet” Sikatop? 111 bond coating
was applied to the repair surface (Figure 18). The surface was kept
moist with water spray until placing repair mix. Placing repair
material into an area containing standing water was strictly prohibited.
Two, Number 6 (20 mm diameter), longitudinal steel reinforcing bars
(ASTM A-615 grade 60) were added down the old rail slot. The Sikatop?
mixture was placed by wheelbarrow and shovel then screeded flush
to the deck surface with a 2-inch by 4-inch (5 cm by 10 cm) plank
(Figures 19 and 20). Troweling the Sikatop? surface was discouraged
and minimized. The resulting surface finish was rough and unfinished
in appearance. The entire top surface placement was made in 1 day.
Immediately after placement and initial set, a water-saturated cover
of BURLENE? was placed over the repair and kept continuously damp
for 6 days using soaker hoses (Figure 21). After 7 days, the overcut
produced in sawing the repair perimeter was filled with an epoxy
mortar. No visible cracks were apparent after one month.
Figure 18. Applying neet cement bond coating to repair surface.
Figure 19. Placing self-leveling concrete repair material.
Figure 20. Screeding concrete repair.
Figure 21. Covering new repair area with BURLENE?
|
