What Is a Cylinder Capping Set?

The Cylinder Capping Set helps prepare flat and uniform end surfaces on concrete cylinder specimens before compression testing. The rigid frame keeps the specimen aligned while the capping material forms a smooth loading surface. As a result, the specimen can sit more evenly between the compression testing machine platens.

Proper end preparation plays an important role in compression testing. Uneven specimen surfaces may concentrate the applied load at limited contact points. This condition can influence the measured result. Therefore, laboratories should prepare cylinder ends carefully before testing.

Rigid Steel Frame

The capping frame consists of a robust steel base and vertical supports. Its rigid construction helps maintain the specimen position throughout the capping process.

In addition, the frame makes it easier to centre the cylinder on the base plate. Correct alignment supports the formation of a cap that remains perpendicular to the specimen axis.

The LT-C0031 has overall dimensions of 20 × 20 × 30 cm and an approximate weight of 7.5 kg. Its compact design also allows convenient use on a laboratory bench.

Base Plates for Different Cylinder Sizes

LİYA Test supplies the set for Ø100 mm and Ø150 mm concrete cylinder specimens. These sizes cover common cylinder dimensions used in concrete testing.

An Ø75 mm base plate is also available as an optional accessory. Therefore, laboratories can adapt the system to smaller specimens when required.

Interchangeable base plates increase flexibility and allow the same frame to support different cylinder dimensions.

How Is a Concrete Cylinder Capped?

First, the operator selects the correct base plate for the specimen diameter. The plate and frame surfaces are then cleaned before use.

Next, the cylinder is positioned vertically within the frame. The operator prepares the appropriate capping material and places it on the base plate. The specimen is then carefully lowered into the material.

The frame helps keep the cylinder centred and vertical while the cap forms. After the capping material reaches sufficient strength, the operator removes the specimen from the apparatus.

The same procedure can then be repeated on the opposite end. Finally, the operator checks the flatness, parallelism and alignment of both capped surfaces.

Use According to ASTM C617/C617M

ASTM C617/C617M covers bonded capping procedures for cylindrical concrete specimens and drilled concrete cores. The standard addresses suitable capping materials and preparation methods used before compression testing.

The Cylinder Capping Set supports this preparation process by providing a stable frame and controlled specimen alignment. However, laboratories must select the appropriate capping compound and follow the applicable test procedure.

Concrete Compression Test Preparation

EN 12390-3 covers the compressive strength testing of hardened concrete specimens. Proper loading surfaces help distribute the applied force more uniformly during the test.

The set also supports specimen preparation workflows associated with ASTM C31, ASTM C192, AASHTO T23 and AASHTO T126, depending on the applicable concrete testing procedure.

Reliable Laboratory Specimen Preparation

The Cylinder Capping Set combines a rigid steel frame, interchangeable base plates and straightforward specimen alignment in one compact system.

As a result, laboratories can prepare concrete cylinders for compression testing in a controlled and repeatable manner. The system helps create flat, parallel and properly aligned loading surfaces, supporting more consistent compression testing procedures.