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ITB-100 Indirect tension brazilian tester

ASTM D3967 and ISRM suggested method

Description

This manual operated ITB-100 allows the determination of tensile strength via a uniform diametral line compression of a cylindrical specimen. Using cylindrical specimens and compressing them vertically between two cylindrical seating loading jaws gives an indirect tensile stress and a corresponding deformation in the orthogonal plane. This experimental setup is also known as the Brazilian test and can be used with the Point Load Tester and compression strength press. The fixture is designed to test multiple specimen diameter using replaceable specimen end caps. The device comprises two upper and lower loading plates guided by two columns through low-friction bearings to ensure alignment between the fixture and specimen. Both plates feature removable curved specimen end caps that come in contact with the specimen. They are made of hardened steel and ground flat to minimize stress concentration on the specimen. In addition, a spherically seated washer in the upper plate avoids bending-moments and ensures axial loading alignment.

Specifications

Standard

ASTM D3967 and ISRM suggested method

Specimen diameter

Specimen diameter of up 38.1 mm (1.5 inch)

BX for specimen diameter of 42.0 mm (1.654 inches)

NX for specimen diameter of 54.7 mm (2.154 inches)

Specimen thickness

Between 0.2 to 0.75 x the specimen diameter

Material         

High grade stainless steel

Rated force capacity

100 kN

Benefits

Assured excellent alignment between the fixture and the specimen

Easy installation of removal from the load frame

Hardened specimen end caps for testing strong rock

Versatile, allows multiple specimen diameter to be tested using the same fixture

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