Prism Mold, 3x3x10 Humboldt - HU3254-000
- Humboldt - HU3254-000
ASTM C151, ASTM C157, ASTM C227, ASTM C311, ASTM C342, ASTM C441...
- Designed to produce required 10" effective gauge length, prism test bars.
A durable steel prism mold for restrained volume-change testing of cementitious materials
The Humboldt H-3254 Cement Prism Mold is designed for preparing 3 × 3 × 10 in (76 × 76 × 254 mm) prism test specimens used in volume-change testing. Manufactured from cold-rolled steel, this single-specimen mold provides the required 10-inch effective gauge length for testing in accordance with ASTM C878.
Designed for ASTM C878 volume-change testing
The H-3254 is specifically designed for testing the restrained expansion of shrinkage-compensating concrete in accordance with ASTM C878. The mold forms the standardized prism specimen required for monitoring dimensional change during the test procedure.
10-inch effective gauge length
The mold is designed to produce prism test bars with a required 10 in (254 mm) effective gauge length. The effective gauge length is measured between the inside ends of the gauge studs, providing the reference length needed for subsequent dimensional measurements.
Removable mold components
The mold features removable partitions, base and end plates. This construction facilitates specimen preparation and provides access to the molded prism after curing and preparation for testing.
Cold-rolled steel construction
The H-3254 is manufactured from cold-rolled steel for the rigidity required during specimen molding. It is a single-cavity mold designed to produce one 3 × 3 in prism specimen at a time.
Prism dimensions and gauge studs
Although the mold is identified by its 3 × 3 × 10 in test size, Humboldt specifies that the resulting cement prism specimen is approximately 11.25 in long. With the gauge studs included, the overall outside-to-outside specimen length is approximately 11.625 in. The 10-inch dimension refers to the effective gauge length measured from the inside ends of the studs.
Specifications
| Manufacturer | Humboldt |
|---|---|
| Model | H-3254 |
| Product Type | Cement prism mold |
| Nominal Size | 3 × 3 × 10 in |
| Metric Size | 76 × 76 × 254 mm |
| Effective Gauge Length | 10 in / 254 mm |
| Number of Specimens | 1 |
| Material | Cold-rolled steel |
| Approximate Molded Prism Length | 11.25 in |
| Overall Specimen Length Including Studs | 11.625 in |
| Application | Volume-change testing |
| Standard | ASTM C878 |
Frequently Asked Questions
What is the Humboldt H-3254 prism mold used for?
It is designed to prepare cementitious prism specimens for restrained volume-change testing. Humboldt specifically lists the H-3254 for ASTM C878 testing.
Why is it called a 3 × 3 × 10 in mold if the specimen is longer than 10 inches?
The 10-inch dimension refers to the effective gauge length, measured between the inside ends of the gauge studs. Humboldt specifies an actual molded prism length of approximately 11.25 inches and an overall length of approximately 11.625 inches when the studs are included.
Is the H-3254 made of stainless steel?
No. Humboldt specifies the H-3254 as being manufactured from cold-rolled steel.
How many specimens does the H-3254 mold at one time?
The H-3254 is a single-specimen mold and produces one 3 × 3 in prism at a time.
What other equipment is used with the H-3254 for ASTM C878 testing?
ASTM C878 testing requires additional equipment beyond the prism mold. Humboldt lists its H-3257 restraining cage for the 3 × 3 × 10 in mold, along with a suitable length comparator, tamping rod and concrete vibrator as part of its ASTM C878 equipment recommendations.
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