MK Instruments


MK 01010 - Proctor Compaction Test Apparatus, IS : 2720 (PART-7)

Soil compaction is a fundamental requirement for the construction of earth fill for dams, reservoirs, canal embankments, highways, railways and runways. The relationship between soil moisture content and compacted dry density is very useful for deciding construction specifications and quality control of compacted earth fill. While designing an earth or earth retaining structure, the strength and deformation behaviour of soil is evaluated by testing soil specimen compacted to the density as would be achieved during construction. The construction quality control is essentially to check the density of compacted soil achieved in the field, thereby checking its strength.

Compaction Test Apparatus, Manual IS:2720 (Part 7)-1987, IS:2720 (Part 8)-1990, IS:9198- 1979, IS:10074-1982, BS:1377 Following models of Manual Compaction Test Apparatus.

  • Compaction Test Apparatus 100mm ID x 127.3mm height and 1000cc volume for Light Compaction Test As per IS : 2720 Part-VII. Complete with Collar Base Plate and Rammer of 2.6 Kg x 310mm.
  • Compaction Test Apparatus 150mm ID x 127.3mm height and 2250cc volume for Heavy Compaction Test As per IS : 2720 Part-VII. Complete with Collar Base Plate and Rammer of 4.89 Kg x 450mm.


This Apparatus is used for determination of the dry density of compact, fine, medium grained soils and for layers not exceeding 50 cm thickness. A circular hole is dug into the ground, all the soil from within it collected, weighed and dried, and the hole back-filled with a standard uniform sand or fine gravel, poured from a calibrated container for calculating the volume of hole.

Sand Pouring Cylinder, fitted with conical. Funnel and Shutter,

  • 100mm (10cm) dia Sand Pouring Cylinder
  • 150mm (15cm) dia Sand Pouring Cylinder
  • 200mm (20cm) dia Sand Pouring Cylinder


Using a speedy moisture meter, the moisture content of soils, sand and other fine-grained material can be obtained quickly with reasonable accuracy. The test technique is based on the fact that water will react with calcium carbide to form acetylene gas and the quantity of gas formed is directly proportional to the water present, leaving a surplus of the chemical used in the test. The quantity of acetylene gas produced is indicated on a built-in pressure gauge, which is calibrated in percentage of moisture on wet weight basis.
  • Range : 0-25% Gauge Division 1%
  • Range : 0-50% Gauge Division 1%


This is used for determination of in situ dry density of natural or compacted fine grained soil, free from aggregates. A cylindrical cutter is used to extract a sample of the soil with the help of a dolly and rammer. From the weight, density and the moisture, and dry density of the soil is ready calculated. It consists one each of: cylindrical core cutter mode of steel, 127.3mm. Long and 100mm internal diameter. Steel dolly, 25mm high with a lip to enable it to be located on top of the core cutter, rammer with detachable steel rod.

MK 01060 - California Bearing Ratio Apparatus (C.B.R. Machine)

The CBR test is used for determining the relative bearing ratio and expansion characteristics under known surcharge weights of base, sub-base and sub grade soils for the design of roads, pavements and runways. Tests can be conducted on all types of soils including sand, gravel and washed stone (passing through 20 mm IS Sieve). The CBR test is used extensively in selection of materials and control of sub grades. The procedure consists of loading soil with a circular piston, 50 mm dia face and maintaining a penetration rate of 1.25 mm/min. The load is noted and the results of test on natural or recompacted soils, in soaked and unsoaked conditions, can be compared with standard test results.

The Apparatus Consist of following:-

  • Load Frame, 50kn ( 5000 kgf)
  • Mould 150mm ID x 175mm high
  • Perforated Base Plate
  • Extension Collar, 150mm ID x 50mm high
  • Penetration Piston, 50mm face dia
  • Adjustable Bracket, for Penetration Dial Gauge
  • Circular Metal Spacer Disc
  • Annular Metal Weight, 2.5kg, 147mm dia with 53 mm dia central hole
  • Perforated Metal Weight 2.5 kg. 147mm dia, with 53mm dia soft
  • Perforated Plate, 148mm dia, with adjustable stem and lock nut
  • Metal Tripod for Dial Gauge
  • Cutting Collar
  • Rammer 2.6kg, 310mm controlled drop
  • Rammer 4.9kg, 450mm controlled drop
  • Proving Ring Capacity 50 KN
  • Dial Gauge, 25 mm travel, 0.01mm least count.

MK 01180 - SIEVES : IS : 460 - 1962

  • 20cm Dia Brass Frame Sieves
  • 30cm Dia G.I. Frame Sieves
  • 45cm Dia G.I. Frame Sieves
BSS Mesh No. (410/1969) ASTM Mesh No. (11-70) ISS (469/1972) Microns
4 5 4.00mm 4000
5 6 3.35mm 3353
6 7 2.80mm 2812
7 8 2.36mm 2411
8 10 2.00mm 2057
10 12 1.70mm 1680
12 14 1.40mm 1405
14 16 1.18mm 1204
16 18 1.00mm 1003
18 20 .850mm 850
22 25 .710mm 710
25 30 .600mm 600
30 35 .500mm 500
36 40 .425mm 420
44 45 .355mm 355
52 50 .300mm 300
60 60 .250mm 250
72 70 .212mm 210
85 80 .180mm 180
100 100 .150mm 150
120 120 .125mm 120
150 140 .106mm 105
170 170 .090mm 90
200 200 .075mm 75
240 230 .063mm 63
300 270 .053mm 53
350 325 .045mm 45
400 400 .037mm 37
500 0.25mm 35

MK 01100 - SIEVE SHAKER APPARATUS - Hand operated

This is a light, portable but sturdy sieve shaker suitable for bench mounting the side to side movement to the carrier which can take upto 7 sieves of 200mm dia is through a train of gears operated by a hand wheel. A heavy fly wheels ensures smooth operation.


Carries upto 7 sieves of 150mm or 200mm diameter. The shaker is driven by a ¼ H.P. Motor through a reduction gear immersed in oil. The sieve table does not rotate but is inclined from the vertical axis and the direction on inclination charges progressively in clockwise direction. If the stop pin below the table is removed, the shaker can have a rotary motion. In addition to this gyratory motion of the table, there is an upward and downward movement ensuring that each square cm of the sieve is utilized. A pair of rods and a holder are supplied. The holder can be fixed on the top of the upper most sieve, and thus the sieve set in firmly held. Suitable for operation form 230 V, 50 Hz Single Phase A.C. Supply.


Moisture contents at which soil has smallest plasticity is called limit. For determination purpose plastic limit is defined as the water content at which a soil will just begin to crumble when rolled in to a thread of 3mm dia.
Specification :
The complete set consists of one each :
  • Glass plate 20cm x 15cm having round ends
  • Brass or stainless steel rod 3mm dia x 150mm long
  • Flexible spatula 15 cm
  • Set of 6 moisture containers
  • Porcelain basin 150mm dia
  • Plastic wash bottle 500ml


Shrinkage limit is the maximum water content at which a reduction in water content does not cause an appreciable reduction in volume of the Soil Mass. At shrinkage limit, on further reduction in water, air enters in to the voids of soils and thus keeps the volume constant. The apparatus can be used to determine shrinkage limit and to calculate other shrinkage ratio, shrinkage index and volumetric shrinkage.

Specification :
Set consists of one each :-

  • Porcelain evaporating dish
  • Shrinkage dish
  • Glass cup
  • Perspex plate with three metal prongs
  • Flexible spatula 100mm
  • Glass cylinder
  • 25ml x 1ml, supplied without mercury


Casagrande method in mechanical form is known as liquid limit method and has been in use for soil mechanics for a number of decades. The liquid limit data of soils is useful to correlate mechanical properties of soil, such as compressibility and lower shear strength. Liquid limit is the water content at which soil passes from zero strength to an infinite strength, hence the true value of liquid limit cannot be determined. For determination purpose liquid limit is that water content at which a part of soil, cut by a groove of standard dimensions, will flow together for a distance of 1.25cm under an impact of 25 blows in a standard liquid limit apparatus. The soil at the water content has some strength which is about 0.17N/cm. sq. (17gms/ . At this water content soil just passes from liquid state to plastic state. It consists on a brass cup held on an adjustable bracket. The cup can be adjusted for a fall of 1 cm and can be raised an dropped on a rubber base of standard hardness by cam action. Complete with one Casagrande grooving tool, one ASTM grooving tool and a height gauge block.
  • fitted with a counter to register the number of blows.
  • fitted with a motor geared down to give approximately 120 rpm. Suitable for operation on 230 V A.C., Single Phase, 50 Cycles.


For determining the liquid limit of soils. This is specially useful to obtain reliable and accurate results of those soil which have low plasticity index. The percentage moisture contents determined when cone with half angle of 15-30 minutes under a total sliding weight of 148 gm penetrates 25mm gives the liquid limit.

The test is based on the relationship between moisture content and the penetration of the cone into the soil sample. The moisture content at a given depth of penetration of the cone is taken as the liquid limit. As an inferential test, empirical correlations have been developed to assess the shear strength of soils at liquid limit.


This is for mechanical analysis and also other laboratory applications for stirring Speed approximately 4000 R.P.M. under load. A dispersion cup is supported on a rest on the stand of the stirrer and has a removable baffle. For operation on 230V A.C. supplied with dispersion cup or baffle cup.


Consolidation of clay deposits leads to distress in buildings such as cracks and failures. Consolidation is the reduction of volume of soil due to expulsion of water from its pore space caused by sustained loading. This phenomenon is time dependent. The one-dimensional consolidation test performed on an undisturbed sample of clay is useful for understanding the history of the soil deposit. The test results can be used for calculating the settlement of structures built on clayey soil.

The standard outfit comprises fixed ring type of consolidometer cell for testing specimens 60 mm dia x 20 mm thick, but the unit is so designed that specimens of varying sizes from 50 mm dia to 100 mm dia can also be tested. Besides, the same loading unit can be used with floating ring consolidometer cells, which can be supplied at extra cost. The standard outfit is supplied with a set of weights to give a total pressure of 10 kg/cm2 (besides a seating load of 0.05 kg/cm3 on the specimen), but an additional set of weights are required to reach the full capacity of 20 kg/cm2. The necessary accessories to perform the permeability test of the ‘Varying Head’ type can also be provided at extra cost. The outfit is also available as three-gang or six-gang in which three/six consolidometers are mounted on a single frame. The consolidation may be measured by the conventional dial gauges or using the transducers and electronic readout unit in Digital Models.


The Direct Shear test is carried out with an apparatus consisting of a square or circular box divided into two halves. The specimen, contained in the box, is subjected to a constant normal load while an increasing horizontal force is applied to one of the sections of the shear box. This force causes a shear failure along the junction between the box sections. The shear force and the normal load are measured directly. The rate of strain is adjusted by the speed of the horizontal force applied. The loading unit has V-strips on which the shear box housing rests. The precalibrated load yoke with direct and lever system for applying normal load of 8 kg/cm2 capacity, fixtures, for proving ring brackets, for holding consolidation and strain dial gauges and lead screw for application of shear stress


Used to determine the relevant proportions of clay-like or Plastic fines and dust in granular soils & fine aggregate Consists of:
  • Acrylic graduated cylinder (4 nos.)
  • Rubber stopper for cylinder (4 nos.)
  • Graduated Steel rule 450 mm
  • Funnel 100 mm plastic
  • Aspirator bottle 5 lts plastic with rubber cock
  • Stand for the aspirator bottle with siphon assembly
  • Irrgation tube with stop pinch cock & weighted foot assembly


Permeability Apparatus (Falling Head Permeability)

The apparatus is used for the laboratory determination of permeability of soil using a constant or a variable head. This test is recommended for soils with co-effcient permeability in the range of 0 10-3 to 10-7 cm/sec. The maximum particle size of the soil which can be tested in the mould is 10mm. The equipment comprises one each : Gun metal mould, 100mm I.D. x 127.3mm high x 1000ml Volume. Gun metal mould extension collar, 100mm dia x 60mm high for the above mould. Gun metal drainage base plate with a recess for a porous stone.


The equipment is used for the determination of the relative density of cohesion less free draining soils and meets the essential requirements.

Specification :

The equipment consists one each of: Vibratory table, with a cushioned steel vibrating decks about 75cm x 75cm. It has a frequency of approximately 3600 vibratory table, minute under a 11.5kg load. Amplitude is variable in between 0.65mm in step of 0.05 to 0.25mm, 0.25 to 0.45 mm and 0.45 to 0.65mm. Suitable for operations on 415V, Three Phase supply. Cylindrical metal unit weight mould, 3000ml. Capacity.Guide sleeve with clamp assembly. Surcharges base plate for mould. Handle for surcharge base plate. Surcharge weight. The total weight together with surcharge base plate and handle is equipment to 140 kg. /sq. cm. For mould. Cylindrical metal unit weight mould 15000 ml. capacity. (Total weight together with the above mould & surcharge weight is equivalent to 140 kg./sq. cm) dial gauge 0.01mm x 50mm travel. Extension piece 25mm for dial gauge.


The extractor frame is used for taking out soil samples compacted or undisturbed, from 100mm dia and 150mm dia cylinders such as Core Cutters, Proctor moulds, C.B.R. moulds etc.


It consists of a 50Kn capacity hand operated, hydraulic jack mounted on a suitable frame. Two plungers, one for 4”/100mm dia and the other of 6”/150mm dia moulds are supplied Height of thrust plate is adjustable.


Set of plungers adaptors and thrust plates for 38mm, 50mm and 75mm dia specimen.


Designed to extract specimens from almost every type of sampling tube and mould used in solid engineering laboratory or in the field. It can be mounted vertically or horizontally as desired. It has an unique feature that three 38mm dia sample.


Comprises of a frame designed for screw jack operation, one each of the adaptors for 38mm, 75mm, 100mm, 150mm dia meter specimens and a stand to obtain simultaneously three 38mm diameter samples from one 100mm diameter sample. The adaptor plate which slides along the slotted support can be claimed at any desired position by means of locking nuts. Besides this, the tube or mould can be held in position by raising the tube guides and held in position with locking screws. The lead screw movement can be stopped at any predetermined position by tightening the lead screw collar. Plunger adaptor for 200mm dia samples. Adaptor plate with 200mm dia hole and device to extract b number 38mm dia samples.


Augers are used to collect disturbed soil samples at reasonal depths for laboratory tests. Augers are available in two types and each in different sizes. Blade type (posthole type) and helical type (screw type). Each auger outfit consists one each of auger head, one meter long rod, tee piece and handle. Depth of excavating can be increased using additional extension rods.


(a) 50mm, (b) 75mm (c) 100mm dia (d) 150mm dia


(a) 25mm, (b) 38mm, (c) 50mm, (d) 75mm, (e) 100mm, (f) 150mm, (g) 200mm, (h) 250mm, (i) 300mm dia,


Extension rod 1 meter length with threading at both ends and couplings, set of two spanners and tee piece.