slake durability test

slake durability test

REFERENCE

-Method for determination of slake durability index of rocks.

OBJECTIVE

This test is done to find out the resistance offered by a rock sample to weakening and disintegration when subjected to two standard cycles of drying and wetting in a slaking fluid usually water.

APPARATUS USED

NAME OF EQUIPMENT	CAPACITY	LEAST COUNT/ACCURACY
Balance	As per requirement
Slake durability test apparatus		—
Oven

SAMPLE PREPARATION

Test sample consist of minimum of 10 rock lumps, each weighing 40 to 60 g to give a total sample weight of 400 to 600 g. Rocks lumps should be spherical and corners of rock lumps should be rounded off during preparation.

PROCEDURE

1.   Dry the sample to constant mass by placing it in oven, maintained at a temp of 105±50C. Place the sample in the drum of the machine and record the weight of sample plus drum as ‘A’.

2.   Fit the lid with the drum; mount the drum in the trough.

3.   Fill the trough with slaking fluid to a level 20 mm below the drum axis. Rotate the drum at 20 rev/min for a period of 10 minutes.

4.   Remove the drum from trough and remove the lid from the drum.

5.   Dry the drum plus retained portion of the sample in an oven maintained at a temp of 105±50C.

6.   Record the weight of drum plus retained portion of the sample as ‘B’.

7.   Repeat the steps from 2 to 5 for a further period of 10 minutes. Record the weight of drum plus retained portion of sample as ‘C’.

8.   Clean the drum and record its weight as ‘D’.

CALCULATION

The slake durability index (2nd cycle) is calculated as percentage ratio of final to initial dry sample weight as follows.

Slake durability index (%), Id2 = ((C-D)/(A-D))*100

REPORT

The slake durability index is reported to the nearest 0.1%.

JUAL LAB VANE SHEAR

CV MEDIA SARANA TEKNIK 

 VANE SHEAR LAB

Part Name Specification Speed of rate 5 degree per minute 50/60 Hz, 220 Volt-AC, 50 Watt Maximum Shear Undrained (Su) 1Kg/cm2  Sensitivity  0.02 Kg/cm2  per division Vane size  12.5mm x 19mm, 19mm x 25.4mm and 25.4mm x 25.4mm Dimension  60 x 25 x 35 cm Gross Weight  55Kg

Uji geser laboratorium baling-baling untuk pengukuran kekuatan geser
tanah kohesif, berguna untuk tanah dengan kekuatan geser rendah kurang dari sekitar 0,5 kgf / cm2).
Tes ini memberikan kekuatan tanah yang tidak terdrainase dan yang tidak terganggu dan dibentuk kembali
kekuatan yang diperoleh digunakan untuk mengevaluasi sensitivitas tanah.

Alat uji geser baling-baling terdiri dari a
kepala torsi dipasang pada braket. Empat geser
baling-baling dipasang pada poros dan poros diperbaiki
di ujung bawah cakram bundar lulus
derajat. Pegas torsi dipasang di antara torsi
kepala dan disk bundar. Pointer maksimum
disediakan untuk memudahkan membaca 

sudut TORSI

CV.MEDIA SARANA TEKNIK  MENJUAL ALAT VANE SHEAR LAB SILAHKAN HUB Telp : (022)20670083 081221826905email : mst@alatujisipil.comatau kunjungi website kami di WWW.ALATUJISIPIL.COM