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Total Stress Tests -
Direct Shear Strength using 300mm Large Shearbox

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Testing

Results given: You provide:
  • Peak Shear Strength(s)
  • Residual Shear Strength(s) if required
  • Displacement(s) at peak
  • Test Type
    (peak only, peak & residual, single specimen, set of 3 etc.)
  • Remoulding conditions
    (if applicable)
  • Normal Stress(es)
    (eg. 50,100,200 kPa)
Typical use(s): Material required:
  • Slope stability
Undisturbed:
  • Enough intact material to trim down to a 300mm square by 150mm high block for each specimen required.
    (usually block samples, well wrapped, padded, and packed in a stout wooden box or crate)

Remoulded:

  • Approximately 30kg of <20mm material per specimen.
    Note:
    If the particles are weak and break down during testing (such as weathered sandstone or crushed concrete), then fresh material must be used  for each specimen, requiring around 90kg for a set of 3 specimens. If material is available in limited quantities but can be re-used without degradation for subsequent specimens, then 40kg will be sufficient for a set of 3 but will significantly increase turnaround times due to drying/wetting times between specimens.
Description Price excl. VAT
Immediate shear strength by rapid direct shear
(BS1377 : Part 7 : Clause 5 : 1990) and (Specification for Highway Works Vol.1 Clause 636 Part 2)

Note: only suitable for
free-draining, rapidly-consolidating material. If the material is not free-draining and consequently consolidates slowly, then the test is carried out as a drained test and is likely to incur additional extra over day charges.
£ 100.00 per specimen
Peak (and Residual if required), shear strength on consolidated drained specimen
(BS1377 : Part 7 : Clause 5 : 1990) and (Specification for Highway Works Vol.1 Clause 636 Part 3)
£ 100.00 per specimen
(up to 1 day duration)
Extra over days in excess of initial 1 day £ 60.00 per day per specimen
Remoulding specimen at as-received moisture content £ 25.00 per specimen
Remoulding specimen to a specified moisture content £ 45.00 per specimen
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