Quicksand Quicksand is a condition and not a soil type. This condition is created in saturated thick layers of loose fine sandy soils when disturbed either due to vibration, such as, from pile driving in the neighborhood, or due to pressure of flowing water (at the time of heavy pumping in excavation). The particles, in … Read more
The properties of a soil mixture are influenced more by variation in moisture content than by any other cause. Saturated soils are improved in strength by drainage and dry soils lose strength by saturation. A water logged ground is undesirable because of its low bearing capacity. Effect on Fine Grained Soil Fine grained (clayey) soils … Read more
Objective To determine moisture content and dry density relationship using heavy compaction or modified compaction method as per IS-2720-Part-8. Apparatus • Metal mould (volume = 1000 cm3) • Balance (capacity = 10 kg, least count = 1g) • Oven (105 to 1100C) • Sieve (19 mm) • Metal rammer (weight = 4.9 kg) Procedure Dry … Read more
1. Backhoe Backhoe comprises a bucket on the end of an articulated boom, set on a pneumatic tyred or crawler tractor unit. The boom, bucket arm and bucket are usually controlled by hydraulic rams. Back-acters operate by digging towards the machine in an arc from a small distance above the surface on which the machine … Read more
Aim To determine porosity and density of rock using saturation and buoyancy techniques as per IS-13030-1991. Apparatus Oven (capacity 105±30C) Balance (Accuracy of 0.01% of the sample weight) Non corrodible sample container Vacuum vessel for immersion of sample (capacity 0.8 kPa) Immersion bath, wire basket for determination of saturated-submerged weight) Procedure Take at least 10 … Read more
Objective Determination of CBR of soil either in undisturbed or Remoulded condition Reference Standards IS: 2720(Part 16)-1973- Methods of test for soils: Laboratory determination of CBR. Equipments / Apparatus Compression machine Proving ring, Dial gauge, Timer Sampling tube Split mould Vernier caliper, Balance Preparation sample The test may be performed (a) On undisturbed soil specimen … Read more
Aim To determine point load strength index of rock as per IS-8764 Equipments Point load strength test machine A 100 mm scale attached with the loading frame Pressure gauge (Capacity 25 kN or 50 kN) Depending upon the size and shape of test specimen, the point load strength index can be conducted by four different … Read more
Aim To determine shear strength parameters of the given soil sample by conducting unconsolidated undrained (UU) triaxial shear test. Theory And Application Triaxial testing is a test used to measure the shear parameters of a given soil. The test is performed on a cylindrical soil/rock samples. This test is considered to be the most conveniently … Read more
Aim To determine the relative density or density index of cohesionless soil Theory Relative density is also known as density index. It is defined as the ratio of difference between the void ratio of a cohesionless soil (i.e. sand) in the loosest state and any given void ratio to the difference between its void ratios … Read more
Aim To determine the field density of soil at a given location by sand replacement method Reference IS-2720-Part-28-Determination of dry density of soils in place, by the sand replacement method Apparatus Sand pouring cylinder Calibrating can Metal tray with a central hole Dry sand (passing through 600 micron sieve) Balance Moisture content bins Glass plate … Read more