Lodaing Unit
The V-funnel flow time is the period a defined volume of SCC needs to pass a narrowopening and gives an indication of the filling ability of SCC provided that blocking and/orsegregation do not take place; the flow time of the V-funnel test is to some degree related tothe plastic viscosity.
This test is used to determine the compressive strength of a concrete cube, which has usually been made from fresh concrete cast in a standard test mould. The value of compressive strength can then be used to assess whether the batch that the concrete cube represents meets the required compressive strength. Following cube manufacture and curing, which should both be closely controlled, the cube is crushed at a stated constant speed until it can sustain no further increase in load. The strength is then derived by calculation using the maximum load and cube dimensions. The machine embodies an hydraulic system designed to meet the requirements of Indian standards Specification 516-1959 for compression tests on concrete cubes up to 20 cm X 20 cm X 20 cm. and also concrete cylinders up to 30 cm height. Using special platens and fixture, Brick testing and flexural testing can also be carried out on the same machine.
The motorized pumping unit which is housed in an elegant console is of double plunger type and is driven by three phase 440 volts 50 cycles electric motor. The pumping unit is a separate unit connected to the jack by means of a flexible high pressure connecting tube. A junction box is suitably fixed to connect the motor to the mains through a push button starter. The Pumping unit is fitted with hand wheel control valve, which enables the rate of application of load to be varied. The Machine is also equipped with facility for hand pumping in case of power failure
The pumping unit is fitted with a 20cm dia hydraulic pressure gauge with 200 divisions A max red pointer is provided to facilitate taking readings after failure of the specimen. The pressure gauge is fixed at an Angle for easy readability. The Pressure Gauge is accurately calibrated against MASTER `A` Class Proving Ring having traceability to National standards.