As shown in these images, precise formwork results in precise
concrete work with crisp and precise edges, smooth grades and
even transitions.
Radius
walers are cut from the predetermined radius layout points
and are laminated together.
Studs
are cut to predetermined height and placed at 18 inches
o.c. on centerline of plywood joint spacing.
5/8-inch
acx plywood is attached to subframe formwork and covered
with a 3/8-inch M.D.O. plywood.
Formwork
is set and concrete is placed, vibrated and finished.
Forms
are removed after three days of water curing concrete.
Immediately
after form removal, wall joints are determined and scribed.
Joints
are saw cut immediately to approximately 1-1/2 inches
in depth.
After
three weeks cure time, walls are ready for waterproofing
backfill and planting.
Alternate
crack control method is acheived by placing vertical trapezoidal-shaped
reveals on panel joints.
Concrete jointing serves two basic purposes …to control
the location of anticipated random slab cracking, and to aid
in the esthetic appearance of architectural concrete. Below
are the steps taken by Shaw & Sons to prepare for a concrete
pour using the company's patented Speed Dowels™ for finely
finished expandable joints. Speed Dowels™ provide precise
slip dowel allignment while greatly reducing cracking, spalling
and displacement at construction joints.
Attach
Speed Dowel™ baseplate on form with 6-8 penny nail
and slip on Speed Dowel™ tube.
Chair
or block reinforcing steel and presaturate subgrade prior
to concrete pour.
Place
and finish concrete.
Leave
forms on for mimimum of 12 hours.
Remove
forms and Speed Dowel™ base plate.
Roll
out 1/4-inch polypropylene foam.
Spray
3M 77 high tack glue on polypropylene foam and edge of
concrete.
Attach
1/4-inch polypropylene foam below top surface of concrete.
Place
appropriate size smooth dowel through foam into Speed
Dowel™ cavity. (Repeat #2).
Place
and finish concrete.
Sawcut
cold joint at total 1 inch depth to top of foam. Do not
cut steel dowels.
