Steel Retainer Ring Set for Concrete Cylinder Testing

Product Description

FORNEY Steel Retainer Ring Sets are designed for use with neoprene pads during unbonded capping of concrete cylinders for compressive strength testing. Manufactured from rugged, precision-machined steel, these retainers securely hold and confine neoprene pads at both ends of a concrete cylinder specimen, helping distribute the applied load evenly during testing.

Each retainer features corrosion-resistant plating on both interior and exterior surfaces for long-lasting durability in laboratory testing environments. The bearing surfaces are precision-machined to a flatness tolerance of 0.002 in (0.05 mm), providing consistent contact with the upper and lower platens of the compression testing machine.

Designed for repeated use, FORNEY Steel Retainer Rings provide a durable and reliable solution for concrete compression testing. When properly maintained, these retainers can deliver years of dependable service.

Available for 2 in, 3 in, 4 in, and 6 in diameter concrete cylinders, the retainers are sold in sets of two and meet applicable ASTM C1231 and AASHTO T 22 requirements.

Features & Benefits

• Precision-Machined Steel: Heavy-duty construction provides strength and durability for repeated compression testing.

• Corrosion-Resistant Finish: Interior and exterior plating helps protect against rust and wear.

• Accurate Bearing Surfaces: Machined to a flatness tolerance of 0.002 in (0.05 mm) for consistent contact with testing machine platens.

• Secure Neoprene Pad Retention: Holds pads in position during unbonded capping and compressive strength testing.

• Multiple Sizes Available: Compatible with 2 in, 3 in, 4 in, and 6 in diameter concrete cylinders.

• Standards Compliance: Meets applicable ASTM C1231 and AASHTO T 22 requirements.

• Long Service Life: Durable steel construction supports years of use with proper handling and maintenance.

Important Testing Information

For accurate compressive strength testing, the flat bearing surface of each retainer ring must maintain full contact with the upper and lower platens of the compression testing machine. Proper positioning helps ensure uniform load transfer during testing.

• ASTM C1231  
• AASHTO T 22