Procedure

• CHOOSE the amount of sand sample to be tested
• WEIGH the amount of sand sample using the electronic weighing machine
• ARRANGE the sieves in increasing order of the sieve number (bottom to top)
• TRANSFER the sand sample to the topmost sieve
• CLAMP the sieves with the sand sample inside
• Switch ON the sieve shaker and let it agitate for 10-15 minutes
• Switch OFF and DECLAMP the apparatus
• WEIGH the sand samples divided into the sieves separately
• CALCULATE the percentage retained for every division
• CALCULATE the product by multiplying the retained retained percentage in every sieve with the multiplying factor
• CALCULATE cumulative values for percentage retained and product. Divide them to obtain Average Grain Fineness (AFN) number