Table III shows results for tensile, transverse and compressive strength for phenolic–ester bonded sand moulds. The closer you bring the ratio to an even one-to-one ratio of sand to cement, the stronger you will make the concrete. • Cohesiveness This depicts the sand grain particles interact and attract to each other within the moulding sand. • Loading and unloading mechanisms operated by … • Collapsibility The mold must be destroyed after metal get solidified in the mould. In other words, your correlation between green sand properties will greatly suffer with high and variable sand temperature. Hence it was concluded as 75% was the optimum effective replacement level for river sand by MS [2]. SPECIFICATIONS : • Teflon coated Two Hot Plates, Controlled By Digital Temperature Indicator And Controller (0 - 300oc). Response characteristics considered are wet tensile strength, green compression strength and permeability [7]. The strength of the sand that is required to hold the shape of the cavity is called hot strength. Adjusting the strength of concrete based on the ratio of sand to cement is easy to do. Yield Strength, Tensile Strength and Ductility Values for Steels at Room Temperature: Material: Yield Strength: Tensile Strength % Elong. When using the Brazilian test to determine the indirect tensile strength of rock, it is usually assumed that failure is the result of the uniform tensile stress normal to the splitting diameter (see Figure 4a) and that the tensile strength, To, is given by the value of F3 (= -To) at failure 3.1. Fig -5: Proposed system after the test 6. We are Manufacturer, Supplier, Exporter of Hot Tensile Tester and our set up is situated in Kolhapur, Maharashtra, India. Keep your green sand temperature below 120F ( 49°C ) from the mixer to the molding machine. tensile strength and compressive strength was obtained as 4.2 and 29.8 respectively at 75% replacement of MS by river sand. The sand temperature should be held constant if possible during the test. The binding capability of the sand get enhanced to increase the green, dry and hot strength property of moulding and core sand. SPECIFICATIONS : • Teflon coated Two Hot Plates, Controlled By Digital Temperature Indicator And Controller ( 0-300oc ). The values were averaged from 5 samples for each set of percentage ratio. 10 Hot Strength As soon as the moisture is eliminated, the sand would reach at a high temperature when the metal in the mold is still in liquid state. While compressive strength is the easiest property of self-hardening sand to measure, transverse strength or tensile strength are being used more frequently nowadays, particularly for the measurement of maximum strength. In this, pic microcontroller based testing model test the sand accurately with the help load cell. DC motor is Wet tensile strength . Wet and hot tensile are interesting tests. There by a water condensation zone is formed On the other hand, if you push the ratio in the other direction you will get a product that has slightly less strength. CONCLUSIONS This paper represents accurate testing of tensile strength of foundry sand. 1) Phenolic – Ester Sand Mould . R. Janani and A. Revathi studied the concept behind the innovative concept on geopolymer concrete USE : It is use to determine Tensile Strength of shell sand in hot condition. Disk Transverse Tooling 1-1/8" x 2" Tooling Modified Test Pieces Blower Laboratory Muller Laboratory Core Sand Mixer Wet Tensile Strength Tester Hot Distortion Tester High Temp. Wet tensile strength is prime responsible for sand expansion defects like scabbing [4, 5]. USE : It is use to determine Tensile Strength of shell sand in hot condition. displays that digital output is the tensile strength of sand shown (figure5). A. Tensile, Transverse and Compressive Strength . From the sand layers adjacent to casting the water moves away.
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