Hydrodynamic Sieve Test Apparatus
Hydrodynamic Sieve Test Apparatus
EKE 243:
The percentage passing of different fractions determines the photometry of the geotextile being investigated. In the hydrodynamic sieving method, the geotextile specimen loaded with a certain quantity of glass bead fraction, is continuously rotated in a water trough, forcing the glass beads to pass through the geotextile openings.
The apparatus consists of two test drums of 14 cm dia and 7 cm effective length with 16 nos. of 4 mm dia rods provided circumferentially at equal spacing to hold the geotextile specimen in position, two troughs to contain the test drums are supported on horizontal axis, facilitating free rotation and capable of being filled with distilled water to a level of 20 mm below the drums axis, the clearance between the trough and the geotextile can be maintained at about 40 mm.
The apparatus is provided with a motor drive and a change gear assembly to enable rotation of the drums at a speed of 5 rpm to 30 rpm.
For conducting the test, the geotextile specimen is cut and stitched to get a shape of 14 cm dia and 10 cm length to insert over the drum tightly, after immersing the specimen in distilled water for one hour, duly secured by rubber ‘O’ rings, After placing 50 g of the smallest size glass beads inside the drum, the lid is secured and the durm with the geotextile placed in distilled water to the desired level and rotated at 20 rpm for 1,500 cycles, in order to get the optimum filtration opening size, the drum is rotated at a speed of 5 rpm to 30 rpm for 250 to 2,500 revolutions, the percentage of beads passed through the geotextile by dry weight is determined, the test is repeated with increasing size of glass beads till less then 5% of the beads by weight pass through the geotextile.
Essential Accessories:
EKE 24201: Rounded Beads , Made of Glass, Size 0.85 mm (Passing 1 mm and retained at 0.85mm)
EKE 24202: Rounded Beads , Made of Glass, Size 0.425 mm (Passing 0.85 mm and retained at 0.425mm)
EKE 24203: Rounded Beads , Made of Glass, Size 0.25 mm (Passing 0.425 mm and retained at 0.25mm)
EKE 24204: Rounded Beads , Made of Glass, Size 0.18 mm (Passing 0.25 mm and retained at 0.18mm)
EKE 24205: Rounded Beads , Made of Glass, Size 0.15 mm (Passing 0.18 mm and retained at 0.15mm)
EKE 24206: Rounded Beads , Made of Glass, Size 0.075 mm (Passing 0.15 mm and retained at 0.075mm)
Interface Friction Measurement Apparatus(Modified Direct Shear Method)
Interface Friction
Interface Friction Measurement Apparatus, Modified Direct Shear Method
EKE 244:
Soil reinforcement is a recent and fast developing technique to improve soil behavior for a variety of civil engineering works; e.g earth retaining structures , slope stability , land slides protection works, pavement etc.
In order to utilize fully the strength of reinforcement material while transferring load and forces via soil or aggregate to the reinforcement, a correct assessment of the soil/reinforcement frictional relation ship is essential. The frictional properties can be assessed by means of a shear box which is modified either to conduct a “Modified Shear Test” or ‘Pullout Test’ . In the former test, reinforcement material is placed and clamped in the plane of shear with soil above the fabric, whereas in the later test, the fabric placed between the top and bottom shear boxes is covered on both sides with soil and is then pulled out to evaluate the frictional resistance. This interface friction measurement apparatus has been specially designed to evaluate both ‘frictional’ as well as ‘Pullout resistance’ of soil reinforcing materials at a shear rate and drainage condition desired by the designer.
These are 60 x 60 x 25 mm assembles. Can be used for soils D 85 not greater than 4.75 mm. These apparatus are to be fitted in conventional Direct Shear Test Frame.
Note: The Direct Shear Apparatus is to be ordered separately.
Interface Friction Measurement Apparatus(Pullout Method)
Interface Friction
Interface Friction Measurement Apparatus, Pullout Method
EKE 245:
Soil reinforcement is a recent and fast developing technique to improve soil behavior for a variety of civil engineering works; e.g earth retaining structures , slope stability , land slides protection works, pavement etc.
In order to utilize fully the strength of reinforcement material while transferring load and forces via soil or aggregate to the reinforcement, a correct assessment of the soil/reinforcement frictional relation ship is essential. The frictional properties can be assessed by means of a shear box which is modified either to conduct a “Modified Shear Test” or ‘Pullout Test’ . In the former test, reinforcement material is placed and clamped in the plane of shear with soil above the fabric, whereas in the later test, the fabric placed between the top and bottom shear boxes is covered on both sides with soil and is then pulled out to evaluate the frictional resistance. This interface friction measurement apparatus has been specially designed to evaluate both ‘frictional’ as well as ‘Pullout resistance’ of soil reinforcing materials at a shear rate and drainage condition desired by the designer.
These are 60 x 60 x 25 mm assembles. Can be used for soils D 85 not greater than 4.75 mm. These apparatus are to be fitted in conventional Direct Shear Test Frame.
Note: The Direct Shear Apparatus is to be ordered separately.
