 Powercrete is an epoxy based
polymer concrete. Its main purpose is to protect the fusion bonded epoxy coating
on steel pipe under severe handling conditions. The highly abrasion resistant
Powercrete
provides a smooth surface that allows the pipeline to be pulled under the crossing in a
"slick bore" operation with much less drag resistance than conventional
concrete. It can also be used as a rockshield.
Powercrete
is sprayed onto the pipe and results in a hard, smooth surface. Each spray pass results in
a thickness of about 0.030" (0.762 mm). Depending on the pipe diameter, multiple
passes may be applied in order to build up to the desired thickness, ranging from
.030" (0.762 mm) to .125" (3.175 mm) thick. There is no laminating, therefore a
homogeneous layer of cured Powercrete results.
At an atmospheric temperature of about 90oF (32oC),
Powercrete gels to a smear free surface in about 30 minutes. It is hard
after 4 hours, has a very high strength after 24 hours, and reaches full cure and maximum
strength after 7 days. Powercrete, after 24 hours, has a minimum reading
on the SHORE hardness scale of 75.
Powercrete forms an excellent bond to
fusion bonded epoxy coatings. Should any damage occur due to severe repeated blows, the
area can be repaired easily by using the same material after cleaning and the surface
becomes dry.
Powercrete is the result of many years of
combined research by several major corporations involved in pipeline protection.
 Benefits of
Powercrete
- Thickness of only 0.030 inches (0.762 mm) to 0.125 inches
(3.175 mm).
- Maximum adhesion to fusion bonded epoxy.
- Maximum protection for fusion bonded epoxy coatings.
- Reduced diameter of bore hole.
- Light Weight -
Powercrete weighs only 115
lbs/cu ft (1842 kg/cu m) vs conventional concrete at approximately 148 lb/cu ft (2379
kg/cu m).
Example:
A 40 ft (12.2 m) length of 42 inch (106 cm) pipe with a
0.125 inch (0.635 mm) thickness of
Powercrete is increased in weight by
only 487 lbs, versus an increase in weight of 7,960 lbs (3,618 kg) for 1.5 inch (38 mm) of
conventional concrete. A truck could transport four lengths of such pipe protected with
Powercrete,
but only one or two lengths if coated with conventional concrete.
Physical
Characteristics
| PARAMETER |
ENGLISH |
METRIC |
| Specific Gravity |
115 lbs/cu ft |
1842 Kg/cu m |
| Compressive Strength |
10,000 psi |
7,000,000 Kg/sq m |
| Water Absorption |
0.035% |
0.035% |
| Dielectric Strength |
450 Volts/mil |
177,000 Volts/cm |
| Resistance to Acids and
Alkalies |
Excellent |
Excellent |
| Adhesion to fusion bond |
2,500 psi |
1,750,000 Kg/sq m |
| Abrasion resistance |
3.4% loss |
3.4% loss |
Tear Abraser
Wear index CS-10
Wear index CS-17 |
0.089
0.13 |
0.089
0.13 |
Impact resistance
.070 in. thickness and above |
168 in. lbs.* |
194 cm kg* |
*Exceeds height of testing
apparatus
|
