Aggregate and Rock Testing

i2 Analytical UKAS accredited for Aggregate & Rock Testing

The use of aggregates in construction has been prominent since the Egyptians built the Pyramids. Its use in the manufacturing of Concrete, Asphalt and Road Construction makes it one of the leading players in construction.

Aggregates can be derived from two main sources, Primary and Secondary.

Primary Source Aggregate indicates that the materials are naturally occurring deposits which have been excavated and processed for the use in construction and that this is their first use. Such materials can be Limestone, Granite, Alluvial Sands & Gravels, and Sand.

Secondary Source Aggregates will indicate a material not being used for the first time and derived from recycled sources such as Crushed Concrete, Crushed Brick, Glass, Bituminous Road Planning’s, Ground Granulated Blast-furnace Slag (GGBS) and Pulverised Fuel Ash (PFA).

In both cases thorough and stringent laboratory tests are carried out, for a variety of performance  and Quality Control, including Physical, and Mechanical properties.

At i2 Analytical Limited we have the facilities and technical expertise to provide a comprehensive testing service to all aspects of construction design and implementation use of Aggregates.

Our UKAS accredited laboratory can carry out testing to British and European Standards including the following:

Point Load Index
ISRM : 1974 - 2006
Core samples or intact lumps
UCS (Uniaxial Compressive Strength)
ISRM Part 1 : 1985
Core Samples with a height to diameter ration of 2.50 – 3.00
LA (Los Angeles Coefficient)
BSEN 1097 Part 2
Minimum mass of 15kg passing 14 mm sieve retained 10 mm sieve
Aggregate Grading
BSEN 933 Part 1
Minimum Mass - Agg Size 90mm - 80kg, 32mm - 10kg, 16mm - 2.6kg, 8mm - 0.6kg, ≤4mm - 0.2kg
Constituents of Recycled materials
BSEN 933 Part 11
Below 32 mm 20kg
32 mm – 63 mm 50kg
Magnesium Sulphate Soundness
BSEN 1367 Part 2
4kg passing 14 mm – retained 10 mm
Micro-Deval
BSEN 1097 Part 1
10 kg passing 14 mm – retained 10 mm
Aggregate Crushing Value
BS 812 Part 110
Minimum mass of 15kg passing 14 mm sieve retained 10 mm sieve
10% Fines Value
BS 812 Part 111
Minimum mass of 15kg passing 14 mm sieve retained 10 mm sieve
Water Content
BSEN 1097 Part 5
Minimum Mass upper aggregate size (D) ≥ 1.0mm x 0.2 / if ≤1.0mm Minimum mass 0.2kg
Flakiness Index
BSEN 933 Part 3
Minimum Mass - Agg Size 90mm - 80kg, 32mm - 10kg, 16mm - 2.6kg, 8mm - 0.6kg, ≤4mm - 0.2kg
Shape Index
BSEN 933 Part 4
Minimum Mass Upper Aggregate size 63mm - 45kg, 32mm - 6kg, 16mm - 1kg, 8mm - 0.1kg
Crushed and Broken Surfaces
BSEN 933 Part 5
Minimum Mass Upper Aggregate size 63mm - 45kg, 32mm - 6kg, 16mm - 1kg, 8mm - 0.1kg
Absorption
BSEN 1097 Part 6
Minimum Mass Wire Basket (63mm - 31.5mm) Upper Aggregate 63mm - 15kg, ≤4.0mm - 7.0kg.
Minimum Mass Pyknometer (31.5mm - 4.0mm) Upper Aggregate 31.5mm - 5.0kg, 16mm - 2.0kg,
8mm - 1.0kg. Minimum Mass Pyknomter (31.5mm - 0.063mm) Upper Aggregate 31.5mm - 1.5kg,
16mm - 1.0kg, 8mm - 0.5kg, ≤4.0mm - 0.25kg
Loose Bulk Density
BSEN 1097 Part 3
Minimum Mass ≤63mm - 35kg, ≤31.5mm - 20kg, ≤16mm - 8kg, ≤4.0mm - 1.5kg
Frost Heave (Not UKAS Accredited)
BS 812 Part 124
120kg