ACS Site Labratories
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ACS Testing

Aggregate Testing

Aggregate is defined as a granular material used in construction, which may be natural, manufactured or re-cycled. Natural Aggregates: Naturally occurring materials of rock or sand and gravel. These are extracted directly from land or marine sources for use in construction. Manufactured Aggregate: Aggregate of mineral origin resulting from an industrial process involving thermal or other modification

Aggregate Testing In Depth

At ACS Testing we are well equipped to carry out a comprehensive range of tests to determine physical, mechanical and chemical properties. Most of the testing we carry out is accredited by UKAS.


On-Site Sampling of Aggregates

At ACS Testing we are UKAS accredited to carry out on site sampling from stockpiles of fine and coarse aggregates by hand. ACS Testing provide highly skilled technicians who all hold current CSCS cards and are comprehensively trained in the safety aspects of the work they carry out in accordance with appropriate method statements and risk assessments.


  • Sampling stockpiles of fine aggregates by hand
  • Sampling stockpiles of fine aggregates by hand
  • Sampling coarse, fine and all in aggregates from heaps


Laboratory Testing

Our permanent laboratories provide a comprehensive range of tests on soils.


  • Moisture content - oven drying method
  • Particle density and water absorption
  • Bulk density and calculation of voids
  • Particle size distribution - washing and sieving
  • Particle size distribution - dry sieving
  • Uniformity coefficient
  • Flakiness index
  • Shape index
  • Shell content
  • Aggregate crushing value
  • Ten per cent fines - dry and soaked
  • Aggregate impact value - dry and soaked
  • Frost heave
  • Assessment of fines - sand equivalent test
  • Assessment of fines - methylene blue test
  • Constituent materials in recycled aggregate and recycled concrete aggregate
  • Micro-Deval coefficient
  • Resistance to fragmentation by the Los Angeles test method
  • Water content
  • Polished stone value
  • Aggregate abrasion value
  • Magnesium sulfate test (excluding simple petrographical description)
  • Drying shrinkage
  • Humus content
  • Lightweight contaminators
  • Laboratory reference density and water content - vibrating hammer
  • Petrographic description