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BD Instruments

Author: Syed Islam

BD InstrumentsArticles by: Syed Islam

Sample Splitter (Riffle Box)

General Features:
Used for the precise division into two representative portions of materials such as: aggregates, sand, gravel and similar.
Electrostatically painted and they are supplied with 3 collecting pans.
Another model Mini Riffle Box is available as stainless steel.

Standards:
EN 933-3, ASTM C136

Technical Specification:

Bulk Density Measure

General Features:
Used to determine the loose bulk density and voids of aggregates.
Bulk Density Measures are manufactured from heavy gauge steel and coated against corrosion.

Standards:
EN 1097–3, ASTM C29-97

Technical Specification:

Large Capacity Sample Splitter

General Features:

Large Capacity Sample Splitter is used to obtain the representative samples in required quantity for the related tests from the aggregates parts which comes to laboratory. 
Widths of Slots are adjustable between 12,5 mm with 100 mm. 
Large Capacity Sample Splitter consist of three parts; 
• Carrier,
• Splitter,
• Collecting pan 
All parts are manufactured from steel and electrostatic painted. 
Large Capacity Sample Splitter splits the sample to two equal volumes. 
Large Capacity Sample Splitter has been designed so that no samples remain on the surfaces during operation.

Wheels are available as an option and should be ordered separately.

Technical Specification:

Accessories / Spare Parts:

Flakiness (Thickness) Gauge

General Features:
To verify if aggregate is flaky; i.e. if its thickness is less than 0.6 of its nominal size.

Standards:
BS 812

Technical Specification:

Length Gauge

Length Gauge

General Features:
Used to determine the elongation index of aggregates: i.e. if length is more than 1.8 of nominal size. Mounted on a hardwood base.

Standards:
BS 812

Technical Specification:

Shape Index Caliper

Shape Index Caliper

General Features:
For measuring the length/thickness ratio of individual particles.

Standards:
EN 933–4, 933–5, 933–7
Technical Specification:

Nordic Abrasion Machine

General Features:

Nordic Abrasion Machine has been developed for testing the resistance of aggregates to wear by abrasion from studded tyres. The test is performed on natural or artificial stones and aggregates between 11.2 mm and 16.0 mm.
The test consists of a rotating aggregate in a drum containing steel abrasive balls and water. The machine consists of an electronic control unit and a rolled stainless steel drum having an internal diameter of 206.5 mm, internal length of 335 mm and thickness of 6 mm. The drum is rotated at a speed of 90 ± 3 r.p.m. 3 wings are installed inside of the drum to allow the balls and aggregates to be mixed properly.
The abrasion loss rate of aggregates is calculated after the specified number of revolutions stated in the relevant standard.
11,1 mm diameter steel balls ( 3.5 kg.) should be ordered separately.
The Nordic Abrasion Machine is supplied complete with Ø 15 mm, 7 kg Steel Balls.
Standards:
EN 1097-9; UNI 8520-13-16
Technical Specification:
Accessories / Spare Parts:

Aggregate Impact Value

General Features:
Used to determine the impact value of aggregates and select them for a given application.
The machine has a trip-action hammer release, and blow counter device. Manufactured from plated steel against corrosion. The counter fitted to the machine automatically records the number of blows delivered to the sample.  Supplied complete with 75 mm diameter * 50 mm cylindrical measure and steel tamping rod. 

Standards:
BS 812

Technical Specification:

Accessories / Spare Parts:

Aggregate Crushing Value Apparatus

General Features:

Aggregate crushing value provides a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Consists of ∅ 150 mm steel cylinder, plunger, base plate, tamping rod ∅ 16 x 600 mm and measure ∅ 115 x 180 mm deep. Used for aggregate passing 12.7 mm and retained by 9,52 mm sieve. Consists of∅ 75 mm steel cylinder, plunger, base plate, tampingrod ∅ 8 x 300 mm and measure ∅ 57 x 90 mm deep.Used for aggregates smaller than 9,52 mm. All parts are powder coated or galvanized.

Standards:
BS 812:110

Technical Specification:

Accessories / Spare Parts:

Sand Equivalent Test Set

General Features:
Sand Equivalent Test Set is used to determine the fines of aggregates.
The Sand Equivalent Test Set complete with siphon assembly (irrigator tube with valve, rubber stopper, siphon tube and hose, blow tube), funnel, measuring can, 5 lt capacity sand jar and a carrying case.
Supplied with two Sand Equivalent Measuring Two Graduated Cylinder and EN Model Weighted foot assembly for EN Model and two Sand Equivalent Measuring Graduated Cylinder and ASTM Model Weighted foot for ASTM Model.

Standards:
EN 933–8, ASTM D2419, AASTHO T176

Technical Specifications:

Accessories / Spare Parts: