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Aggregate Testing

Mechanical Rotating Sample Divider (Motorised)

IS : 1607-1960

HA 50.05

For obtaining representative sample for sieve analysis. It is suitable for dry sands, fine powders, ores, refractory materials, mineral aggregates, pigments, powered coal, soap, cement etc. Up to a maximum particle size of 3 mm.

The sampler consists of the following :-

  • A hopper with an adjustable orificehaving six holes of 1.6 mm, 3 mm, 5 mm, 6 mm, 8 mm and 10 mm dia and a shutter.
  • A rotating spreader turning at approximately 440 rpm to distribute the sample over the trough. Suitable for operation on 220v, 50 Hz, single phase supply

Riffle Sample Divider (13 mm)

IS : 1607-1960

HA 50.10

For sampling aggregates, ores, refractory materials, pigments, powdered coal, soap, cement etc. It consist of the following :-

  • a metal box mounted on legs and fittedwith 14 chutes of 13 mm width each.
  • Three collecting pans,

Riffle Sample Divider (25 mm)

HA 50.15

Same as HA50.10 except that it has 16 chutes of 25 mm width and three pans.

Thickness Gauge IS:2386 (part 1)- 1963

HA 50.20

Used for determining the Flakiness Index of aggregates. It consists of a panel havingaccurately cut slots of different standard lengths and widths.

Length Gauge IS : 2386 (part - 1) 1963

HA 50.25

Required for determining the elongation index of coarse aggregate. It consists of a metal plate on which 8 steel pins are vertically mounted with specified distances in between. This assembly is mounted on a hardwood base.

Cylindrical Measures

IS : 2386 (Part - III) -1963, IS : 10079-1982

HA 50.30

Required for determining the bulk density or unit weight of aggregates.

Three calibrated cylindrical measures one each of 3 litre, 15 litre and 30 litre capacity made out of steel sheet with handles, complete with one tamping rod 16 mm dia x 60 cm long rounded at one end.

Metal Measures

IS : 1199-1959, IS : 10078-1982

HA 50.35

For determining the weight per cubic meter, yield, cement factor etc. freshly mixed concrete. The set comprises one each of 10 litre and 20 litre capacity cylindrical measures complete with handles.

Density Basket

IS : 2386 (Part III) - 1963

HA 50.40

For determination of specific gravity and water absorption of aggregate. It is made of G.I. wire-mesh of approximate size 20 cm dia x 20 cm high. Complete with handle.

Buoyancy Balance

HA 50.43

Buoyancy balance is a multi purpose type of unit with electronic balance for the determination of density of the sample, weight in water, volume of the sample, or for analysis of fresh concrete.

The unit consists of a tubular frame, a carriage connected through chain to a ratchet. Balance is kept on the top of the table and has a hook for hanging the specimen. Powel and ratchet is provided to raise the plate form along with the plastic container filled with water. Balance has the capacity of 16kg.

Filler Compaction Apparatus

BS : 812-1967

HA 50.45

For determining voids of dry compacted filler.

It comprises the following :-

  • A cylinder moving on two guides fixed to the base.
  • A plunger graduated in centimeters with a vernier scale.

Sand Absorption Cone and Tamper

ASTM C 128-84, AASHO T 84

HA 50.50

For determining the slump of fine aggregate in estimation of absorption of fine aggregate.

It consists of the following :-

  • A metal mould in the form of frustumof a cone 40 mm dia at the top, 90 mm dia at the bottom and 73 mm in height.
  • A metal tamper having a flat circular tamping face 25 mm dia and weighing 340 g approximately.

Deval Attrition Testing Machine

IS : 2386 (part IV) - 1963

HA 50.55

For determining the abrasion value of coarse aggregate.

It consists of the following :-

  • Two hollow cast iron cylinders closed at one end and fitted with tightly fitting covers at the other and mounted on a shaft at an angle of 30o to the axis of the shaft. The cylinders are of 20 cm internal diameter and 34 cm deep.
  • A shaft adjusted to rotate at 30-33 rpm by reduction gear mechanism operated by a motor.
  • A revolution counter. Suitable for operation on 440 V, 50 Hz, 3 phase supply.

Deval Attrition Testing Machine

IS : 2386 (part IV) - 1963

HA 50.555

Same as HA 50.55 except that it has a digital preset counter.

Los Angels Abrasion Testing Machine

IS : 10070-1982

HA 50.555

Used for estimation of abrasion value of coarse aggregate.

The machine comprises the following :-

  • A hollow steel cylinder mounted on a sturdy frame on ball bearings capable of rotating about its axis in a horizontal position.
  • A detachable shelf fitted inside the cylinder at a distance of 1250 mm from the opening measured along the circumstance in the direction of rotation.
  • A motor with reduction gear which runs the drum at 30-33 rpm.
  • A tray.
  • A revolution counter.
  • Abrasive charge consisting of 12 steel ball approximately 48 mm dia and each weighing between 390 and 445 g. Suitable for operation on 440 v, 50 Hz, 3 phase supply.

Los Angels Abrasion Testing Machine

HA 50.560

The machine is same as HA 50.60 except that it has pre-set electronic counter

Dorry Abrasion Testing Machine

BS : 812-1967

HA 50.70

For determination of the resistance of aggregates to surface wear by abrasion. The apparatus comprises the following :-

  • A circular disc mounted on a reduction gear driven by an electric motor at about 28-30 rpm.
  • Two large trays for holding the sample.
  • Two small trays for sample.
  • Two conical hoppers for sand.
  • Two sample try holders.
  • Two sets of weights for loading the samples.
  • A revolution counter.

Suitable for operation on 220 V, 50 Hz, single phase supply.

Aggregate Impact Test Apparatus with Counter

IS : 9377-1979

HA 50.80

Required for determining the Impact Value of coarse aggregate.

It consists of the following :-

  • Fitted with an automatic blow counter.
  • A heavy circular base with two vertical guides fitted with a cross bar at the top.
  • A hammer of 13.75 kg mass which can be raised and allowed to fall freely through 380 +5 mm with locking arrangement.
  • A cylindrical cup, a metal measure and a tamping rod 10 mm dia x 230 mm long.

Aggregate Crushing Value Apparatus (75 mm)

IS: 9376-1979

HA 50.85

Used for determining the Aggregate Crushing Value, The apparatus consists of a steel cylinder 75 mm dia, a plunger and a steel base plate. The surfaces coming into contact with the aggregate are case ardened.

Aggregate Crushing Value Apparatus (150 mm)

IS :9376-1979

HA 50.90

Same as HA 50.85 but with 150 mm dia steel cylinder and plunger.

Reaction Container

IS:2386 (Part VII)

HA 50.95

The reaction container is one of the important apparatus, required for determination of the Potential Alkali Reactivity of aggregates by chemical method when used in concrete having high alkali cement. It is made from stainless steel and fitted with air tight cover, held in position with special clamp.

Tile Abrasion Testing Machine

IS : 1237-1980, IS : 1706 - 1972

HA 50.100

Used for determining the resistance of flooring tiles to wear or abrasion.

It consists of the following :-

  • A grinding disc furnished with a replaceable grinding path and rotating horizontally about its vertical axis.
  • A circular tray enclosing the grinding disc.
  • Holding device for test specimen.
  • Reduction gear coupled to a motor for operation on 220 v, 50 Hz, single phase supply electronic.
  • Revolution counter. (Preset cumulative).
  • A 7.5 kg weight to apply 30 kg load on specimen through lever.

Accelerated Aggregate Polishing Machine

IS : 2386 (Part V)-1963

HA 50.105

Used for polishing the road aggregate specimens for determining the polished stone value.

It consists of :-

  • A road wheel suitable for clamping 14 road stone specimens on its periphery.
  • A rubber tyred wheel fitted with a lever system to exert a load of 40 kgf. on the road wheel.
  • An electrically operated vibrating hopper unit for feeding emery powder over the road wheel.
  • A water reservoir for feeding water into hopper.
  • Seven moulds for the preparation of samples.

Suitable for operation on 220v, 50 Hz, single phase supply.

Skid Resistance Tester

HA 50.107

This apparatus consists of a spring-loaded rubber shoe mounted on a pendulum arm. The pendulum arm can be adjusted vertically from a rigid suport column when in operation. The base has three adjustable feet so that the swing of the pendulum during test moves through a truly circular path while in operation directly on a road surface. An essential feature of this apparatus is the fact that the slider is made from a carefully graded rubber specially selected and certified by Transport and Road Research Laboratory of Great Britain . All bearing and working parts are enclosed.