Milestone Instruments

Uttam Nagar, Delhi

It has a removable, precision machined, aluminum rotor bowl, mounted on a vertical shaft. A filter paper disc is pressed in- between the rotor bowl and cover plate by tightening a knurled nut. The bowl assembly is enclosed in a housing mounted on a cast body. In the electrical operating model, the rotor bowl is coupled to a motor. The solvent may be introduced during test through a cup on the housing cover.

This apparatus used for determining the slump of fresh concrete as a measure of its consistency.It consists of a pressure-tight flanged cylindrical measuring bowl, fitted with a removable flanged and a conical cover assembly with a seal in-between. The conical cover has an air valve and a petcock for bleeding off the water. A cylindrical standpipe, which is graduated in percent air content, is fixed to the conical cover assembly. Required pressure is applied to the specimen with the help of a pressure bulb. The recommended limits specified for the air content are between 3% and 6.5%.Each apparatus is supplied complete with a calibrating cylinder, pressure gauge, funnel, trowel and tamping bar.

This is used for measuring the thickness of the geotextile. The thickness of the geosynthetic material can be measured with an accuracy of 0.001 mm (depend on the dial gauge accuracy) for thickness up to 10 mm with Foot pressure of 6.35 mm, 10 mm and 56.4 mm diameter. Dead weight mechanism is provided to apply desired pressure varying from 2, 20 to 200 kPa. Surface plate is grounded and is rust free to enable reproducible results.

Used to determine the resistance to shearing of all types of soil specimens both consolidated and drained, undisturbed or remolded samples.Meets:- IS: 2720 (Part 13), ASTM D 3080, IS: 2720 (Section 1 - Part 39), IS: 11593-1986, IS: 11229 - 1985, 2720 (Part 13) - 1986

The liquid limit, defined as the moisture content at which the soil passes from the plastic state to the liquid state, is very helpful in the classification of the potential properties of the soil material.

The jolting apparatus consists of a rectangular table, rigidly connected by two support arms to spindle at a horizontal distance of 800 mm from the center of the table. The table can be raised and allowed to fall freely by a cam, which is connected to a motor.

Meets:- IS: 4031, ASTM C-188 For determining density of powdered materials-limes, slag and hydraulic cement. Capacity: 250ml. Neck is graduated from 0 to 1ml and from 18 to 24ml.

Method to determine the resistance of geosynthetics to penetration by steel cone dropped from a fixed height, as a simulation of dropping sharp stones on their surface. Generally applicable to all geosynthetics. However, the test principle may not be applicable to some types of products. The specimen is clamped between two steel rings. A steel cone (45 tip angle, 1000 g) is dropped from a height of 500 mm onto the centre of the specimen. The degree of penetration is measured by insertion of a graduated cone into the hole.

Permeability of a geotextile must be substantially greater than that of the protected soil, so that water can pass freely from the soil through the fabric without build up of hydro static pressure. A high value of the permeability of the geotextile also infers that partial clogging will not reduce the permeability. The constant head test is carried out using a head of 50 mm of water.

Essential AccessoriesOverhead Tank Loading unit, 300-kPa capacityCross Permeability Apparatus

The test involves sieving rounded particle sizes for which 5% or less by weight pass through the geotextile. The Apparent Opening Size (AOS) is defined as Retained On size of that fraction expressed as a standard sieve number (size). The test is widely used for relative comparison amongst the geotextiles. Thus AOS is a means of correlating geotextile pore structure to an equivalent screen mesh size. The apparatus consist of a 20 cm dia brass frame with clamp, a receiver and a lid Dry Sieve Test Apparatus.

This test is necessary for drainage application. The permeameters can be of parallel flow or radial flow type. In either case, flow occurs along the plane of the permeamatre. In the apparatus, flow occurs radically outwards, from a central hole to the periphery of a circular specimen. The transmissivity is defined as the volumetric rate of flow per unit width of geotextile and unit hydraulic head. Essential Accessories

• Overhead Tank
• Loading unit, 300 kPa capacity

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. Meets:- IS: 2720 (Part 28)

• Sand Pouring Cylinder Apparatus 100mm Dia.
• Sand Pouring Cylinder Apparatus 150mm Dia.
• Sand Pouring Cylinder Apparatus 200mm Dia.

It consists of Cylindrical Calibration Container, Metal Tray, with central holeOptional Extra Metal Tray without central hole

The apparatus consists of a motor on baseboard capable of driving two or four drums at a speed of 20 rpm. A suitable number of plastic water troughs, each designed to contain a test drum with quick release drive assemblies, permit 1 to 4 drums to be driven at one time. The test drums are supported on water lubricated bearings allowing 40 mm unobstructed clearances below the drum and a trough water level 20 mm below the axis of the drum. Drums are made of brass and comprise 2 mm wire mesh cylinders of 140 mm dia and 100 mm length.

Heavy duty, pillar type frame with Diesel Engine operated with 5 HP capacity Varying cutting feeds provided with water-fed swivel head to connect to suitable water supply. Provision at base for waterElectrical heating, with a Heater and Energy Regulator, Suitable for operation on 230 V, 50 Hz, single phase, AC supply. Each unit is supplied with Bath of heat resistant glass

This apparatus is used for measuring resistance of an aggregate to crushing. Made of mild steel, it comprises:Cylindrical Cell, 150 0.5 mm ID x 130 to 140 mm height Plunger, 1480.5 mm dia x 100 to 115 mm height Base Plate, 200 to 230 mm square x 6 mm thickness Tamping rod, 16 mm dia x 450 to 600 mm length Metal measure, 110 0.5 mm ID x 1800.5 mm height

Compaction : 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.

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).

For determining setting time of hydraulic cement. The apparatus consist of a base plate with a vertical shaft and two horizontal arms, the lower arm being adjustable for height and supplied complete with one initial needle, one final needle and a base plate.