Sand Cone Test

After the compaction of soil, before construction we need to ensure that the soil has been compacted well. So we need to carry out some procedures to ensure it. One of the common test is Sand Cone Test. This test carried out on site and, by results we can ensure that soil achieve it 100% compaction.

Method Of Sand Cone Test,

Apparatus

• Sand pouring Apparatus
• Standard sand-graded between the No.25 and No.52 B.S. Sieves.
• Soil tray with a central hole
• Balance of 15 kg. capacity
• Sensitive balance accurate to 0.1 mg
• Oven

      Procedure
    

      First place the soil tray with hole in earth and fixed it to the ground tightly using steel pins. Then cut a cylinder and collect that all particles in a container. 

     Then fill the Sand Pouring Apparatus with known mass of sand (M1) and place it concentrically on top of the calibrating cylinder. Open the shutter and allow sand to drain out. When no further movement of sand takes place in the apparatus close the shutter and weight the sand remaining in the apparatus (M2). (M1-M2) represent the quantity of sand used in filling calibrating cylinder as well as cone of the apparatus.

     Now [(M1-M2) / (W1-W2)] gives the mess of sand required to fill the calibrating cylinder. Volume (Vc) of the cylinder may be determined either by measuring its internal dimensions or by filling it with water.

            Density of sand can be computed using mess of sand filled in cylinder and volume (Vc) of the cylinder.