Sand Replacement Method

For the full course, visit our website : https://www.nawazify.com Description Determine the unit weight of natural soil in place. Stages Determination of sand filling the cone Determination of bulk unit weight of sand Determination of bulk unit weight of natural soil Procedure Determining the weight of sand filling the cone Sand passing through a 600µ sieve and retained over a 300µ sieve is used. The pouring cylinder attached to the pouring cone is placed over level ground wholly filled with sand and weighed The weight of sand + cylinder before pouring =𝑤_1 Now, place the cylinder on the glass plate and open the shutter, allowing the sand to run out. Weigh the sand collected on the glass plate. This is the weight of the sand filling the pouring cone. The weight of sand in the pouring cone =𝑤_𝑐𝑜𝑛𝑒 The weight of sand + cylinder after pouring on the glass =𝑤_2 The weight of sand in the pouring cone =𝑤_𝑐𝑜𝑛𝑒=𝑤_1−𝑤_2 Determination of bulk unit weight of sand Determine the volume of the calibrated container (V) Fill the pouring cylinder with weight 𝑤_1 again. Place it over the calibrating container and open the shutter. Permit the sand to run into the calibrating cylinder. When no further movement of sand is seen, close the shutter. Remove the pouring cylinder and weigh it. The weight of sand + cylinder after pouring into calibrated cylinder =𝑤_3 The weight of sand filling calibrated cylinder (𝑤_𝑐𝑐 )=𝑤_1−(𝑤_𝑐𝑜𝑛𝑒+𝑤_3 ")" Determination of bulk unit weight of natural soil Exposed about 45 cm square soil area and trimmed to a level surface. Keep the metal tray on the level surface and excavate a circular hole of 10 cm diameter and 15 cm depth. The weight of excavated soil =𝑤^′ Remove the tray and place the sand-pouring cylinder over the hole. The cylinder should contain sand of weight 𝑤_1. Open the shutter and permit the sand to run into the hole. Close the shutter when no movement of the sand is seen. Remove the cylinder and weigh the sand pouring cylinder. The weight of sand +cylinder after pouring into the hole =𝑤_4 The weight of sand in the hole 〖(𝑤〗_ℎ𝑜𝑙𝑒)=𝑤_1−(𝑤_4+𝑤_𝑐𝑜𝑛𝑒) Follow #MachenLink Facebook: https://www.facebook.com/machenLink/ Linkedin: https://www.linkedin.com/company/machenlink/ Twitter: https://twitter.com/MachenLink