Test
Procedure:
Three
concrete cores of 5,000 psi concrete were cut from a single ASTM sample
of concrete and tested by Pacific Testing Laboratory (ISO 25 facility,
with procedure under direction of Kingsley Drake & Associates, physical
engineer) for hydraulic conductivity using a flexible wall pereameter.
For
control, samples with no coating were soaked for 7 days and then
subjected to hydraulic pressure until steady flow was obtained for
a period of 7 days. Pressure required was 20-24 pounds per square
inch, normal ground water pressure range.
Positive
Side Test:
Three samples were sprayed with two coats of CRYSTAL LOK™ at the rate
of 300 sf/gal. Coated specimens were moist cured for a period of 7
days. Pressure was applied to the positive (treated) face and held
steady at each increasing 5 pounds per square inch (psi) increment
of pressure for 72 hours, beginning at the 24 psi failure level.
The positive face test was stopped after zero water flow was observed
at 75psi held steady for 72 hours. This was zero (0) water flow throughout
11 cycles of increasing pressure of 72 hours per cycle. This test
totaled 792 hours in the test chamber per ASTM D5084-90. Seventy five
pounds per square inch pressure is equivelant to pressure of a standing
column of water 173 feet tall.
Negative
Side Test:
The samples were then reversed to the water source and the test cycles
repeated starting again at original failure pressure of 24psi against
the negative (untreated) face of the concrete specimen for a minimum
of 72 hours at each increment of pressure.
The negative
face test was terminated after zero water flow was observed passing
through any test sample at 35psi for 72 hours. Total negative testing
from 24-35 psi at 5 pound increments was 3 cycles at 72 hours each
for 216 hours without failure. This pressure is equivelant to a standing
column of water 135 feet high.
Test
Results: Permeability (x 10-9 cm/sec)
|
core
1
|
core
2
|
core
3
|
| Uncoated
specimens permeable at: |
138’=1.218
|
69’=6.15
|
115’=3.12
|
| Treated
specimen coated face (positive side): |
173’=0
|
104’=0
|
173’=
0
|
| Treated
specimen uncoated face (negative side): |
138’=0
|
69’=0
|
115’=
0
|
Conclusion;
CRYSTAL
LOK™ is effective as both a positive and negative side waterproofer.
Untreated specimens were not waterproof below 10’ at normal ground
water pressures, although specimens were of normal ASTM specified
5,000 psi concrete that most trade personnel would regard as “waterproof”.
CRYSTAL LOK™ will not stop leakage through structural cracks.
DRAKE
& ASSOCIATES
12405 55th Place West
Mukilteo, Washington 98275
Tel/Fax (206) 348-0517
|
April
22, 1996
|
Project
# 117
|
Report of:: CRYSTAL-LOK Permeability Tests
| Client:
|
CORROSEAL
INC
8114 3O4th Ave SE
Preston, WA |
_______________________________________________________________________________________________
Three
concrete cores were cut from a single sample of concrete and
tested by Pacific Testing Laboratory in accordance with ASTM
D5084-90 for hydraulic conductivity using a flexible wall
permeameter.
Each
of the specimens were tested under 3 conditions:
|
1.
Control:
|
No
coating. Specimen soaked in water for a minimum of 7 days.
Then subjected to hydraulic pressure until steady flow
was obtained for a period of 7 days.
|
|
Coating:
|
One
end of the specimen was then sprayed with two coats of
CRYSTAL-LOK at the rate of approximately 300 sf/gallon.
The coated specimen was moist cured for a period of 7
days. |
| 2.
Pressure applied to coated face |
| |
Hydraulic
water pressure applied to coated end of specimen.
Maximum pressure maintained for a minimum of 72 hours. |
| 3.
Pressure applied to uncoated face |
| |
Specimen
reversed in test chamber so that hydraulic water pressure
could be applied to uncoated end of specimen. Pressure
maintained for a minimum of 72 hours. |
CORROSEAL
INC
April 22, 1996
Report #5
| Sample
Number |
1
|
2
|
3
|
|
Height
(cm)
|
3.99
|
2.46
|
3.95
|
Diameter
(cm)
|
6.90
|
6.90
|
6.90
|
| Control
(uncoated specimen) |
|
|
|
| Pressure
(ft water) |
138
|
69
|
115
|
Permeability
(x 10-9 cm/sec)
|
1.28
|
6.15
|
2.12
|
| Pressure
applied to coated face |
|
|
|
| Pressure
(ft water) |
173
|
104
|
173
|
Permeability
(x 10-9 cm/sec)
|
0
|
0
|
0
|
| Pressure
applied to uncoated face |
|
|
|
| Pressure
(ft water) |
138
|
69
|
115
|
| Permeability
(x 10-9 cm/sec) |
0
|
0
|
0
|
|
|
|
|
Respectfully
submitted,
K D Drake & Associates
Kingsley D Drake, PE |
|
|
|
|
