Types Of Flexure Testing Machine

By Author: sudarshan singh
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Flexure Testing Machine (motorised) Rilem : It is used for testing 40mm x 40mm x 160mm mortar specimens for flexural strength.It is a motorized, mechanical unit. The speed is adjusted so that the load increase on the specimen is between 4 to 6 kg/sec. A flexure test attachment for keeping the specimen in position is also supplied. This consists of two rollers 10mm. diameter and spaced 100mm apart and a third roller of the same diameter equidistant from the first two and for transmitting the applied load to the opposite face of the prism. The unit is for operation on 230 Volts, single phase, 50 cycles A.C.supply. Loads are measured on a proving ring fitted with a sensitive dial gauge.Supplied without proving ring.

Flexure Testing Machine : Flexural tests of concrete beam have their own importance in concrete Road Constructions as well as Buildings constructions. Normally concrete beams of sizes 10cm x 10cm x 50cm or 15cm x 15cm x 70cm are tested for flexural strength.The machine consists of a hand operated load frame. The lower platen has two rollers, the distance between which is adjustable. For 150mm x 150mm x 700mm ...
... beam, the centre to centre difference between the rollers is 600mm, while it is 400mm for beams of size 100mm x 100mm x 500mm size beam. A pressure gauge to indicate load is fixed on the load frame. A small pumping unit is attached to the load frame. Total capacity of the machine is 100 KN and a 150mm dia pressure gauge - 100 KN x 1 KN is fitted on the machine. Since this is a hand operated light weight machine, it is useful for field laboratory also.

Flexure Testing Machine (Electrically Operated) : A separate electrically cum hand operated pumping unit housed in a cabinet is supplied. The pressure gauge 0-100 kn x 1 kn, on/off switch and a slow/fast level to control rate of loading are fitted on the front panel of the pumping unit. A facility for hand operation is provided. A micro switch and relay fitted inside the pressure gauge protects the unit from over loading.

The Flexure Strength Testing Machines are designed to test flexural strength of concrete beams. The design provide maximum rigidity throughout their working range. The load is applied by the downward movement of the piston. A spacer is provided for testing different size of beams. The load gauge is calibrated against National Physical Laboratory / National Council for Cement and Building Materials certified proving ring.Flexural bending tests help characterize flexural strength, flexure stiffness and flexural modulus of materials such as ceramic, composites, wood, metals including steel and aluminum, glass, plastic, refractory materials and concrete. Flexural fatigue life and flexural materials property tests are also common to medical devices and electronics.

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