Polymer
Materials: Ring & Cover
The pull/splice box ring and cover shall be constructed of polymer concrete consisting of sand and aggregate bound together with a polymer resin. Internal reinforcement may be provided by means of steel, fiberglass, or a combination of the two. The polymer concrete material is to have the following minimum allowable properties to be accepted for use:
| Ultraviolet Exposure: |
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Tested in accordance with ASTM G-53 using an U.V.A. 340 bulb. |
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| Flammability Test: |
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Tested in accordance with
ASTM D-635. |
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| Accelerated Service: |
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Tested in accordance with Procedure E, ASTM D-756. |
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| Water Absorption: |
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Tested in accordance with Procedure E, ASTM D-570, Section 5,6,1, and 6.5. |
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| Impact Resistance: |
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72 foot-pounds in accordance with ASTM D-2444 using a “C” Tup. |
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| Compressive Strength: |
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11,000 psi tested in accordance with ASTM C-109 loaded at a rate between 28,000 lbs. to 41,000 lbs. per minute. |
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| Flexural Strength: |
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7,500 psi tested in accordance with ASTM D-790. |
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| Tensile Strength: |
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1,700 psi tested in accordance with ASTM C-496. |
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| Skid Resistance: |
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0.50 coefficient of friction in
accordance with ASTM C-1028. |
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| Chemical Resistance: |
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Tested according to ASTM D-543, Section 7, Procedure 1 using the following chemicals:
| Sodium Chloride |
5% |
| Sulfuric Acid |
0.1N |
| Hydrochloric Acid |
0.2N |
| Sodium Sulfate |
0.1N |
| Sodium Carbonate |
0.1N |
| Sodium Hydroxide |
0.1N |
| Transformer Oil Per ASTM |
D-543 |
| Kerosene Per ASTM |
D-543 |
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Fiberglass |
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| Materials: |
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Base Thickness Tolerance ± 1/16” to 1/8” |
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| Flexural Strength |
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17,000 – 18,000 psi |
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| Flex Modulus |
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.59 – .65 psi x106 |
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| Tensile Strength |
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9,100 – 10,500 psi |
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| Impact Strength (notched Izod) |
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15 – 17 ft lbs/inch |
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| Glass Length |
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1” random orientation |
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| Glass Fiber Orientation |
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Non Random |
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| Resin Type |
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Non-Isophthalic |
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| Filler |
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Gypsum |
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| Water Absorption |
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≤ 1% |
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Design Load Requirements
The standard product line is designed and manufactured to perform under the following load rating designations:
10,400 # W.U.C. – 10,400 pound load applied over a 10” x 10” (100 square inch) area. This is in accordance with W.U.C. (Western Underground Committee recommended guide # 3.6 Non-Concrete Enclosures).
20,800 # W.U.C. – 20,800 pound load applied over a 10” x 10” (100 square inch) area. This is in accordance with most Department of Transportation specifications for products installed in their right-of-way behind the curb line.
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Product Test Procedures
The following test methods have been used in evaluating the physical and chemical properties of the hybrid fiberglass/polymer concrete product line. |
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| Impact Properties (Izod) |
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ASTM D 256 ASTM D 2444 |
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| Compressive Strength |
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ASTM C 109 |
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| Tensile Strength |
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ASTM C 190 |
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| Flexural Strength |
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ASTM C 293 |
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| Chemical Resistance |
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ASTM D 543 |
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| Simulated Sunlight |
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ASTM D 1501 |
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| Vicat Softening Temperature |
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ASTM D 1525 |
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| Water Absorption |
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ASTM D 570 |
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| Ultra Violet Resistance |
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ASTM G 53 |
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| Brittleness Temperature |
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ASTM D 746 |
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| Flammability |
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ASTM D 635 |
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| Static Coefficient of Friction |
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ASTM C 1028 |
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