GEOLABS Limited - Geotechnical Laboratory Testing

www.geolabs.co.uk	GEOLABS Limited . . . Tel: +44 (0)1923 892 190 . . Fax: +44 (0)1923 892 191 Effective Stress - Consolidated Drained
Home Quick Prices Testing Index Classification Compaction Compressibility Permeability Durability Hydraulic Cell Tests Total Stress Effective Stress Undrained Drained Rock Advanced Miscellaneous Accreditation Applications Contact Us About Us Other Links	Results given:	You provide:
	Cohesion (c')* Angle of Friction (phi')* Density Moisture Content Deviator Stress and Strain at peak * for multistage or sets of specimens	Remoulding conditions (if applicable) Effective Pressure(s) (eg. 50,100,200 kPa)
	Typical use(s):	Material required:
	Long-term slope stability Foundation design	Undisturbed: sample with a core length of about 2:1 length:dia ratio of full diameter, intact material (ideally at least 2.5:1 length:dia to allow for trimming) block sample twice the size of 2:1 length:dia sample required. Remoulded: 200g of <6mm material for 38mm dia. specimen 4kg of <20mm material for 100mm specimen.
	Description	Price excl. VAT
	Single stage test up to 4 days duration (BS1377 : Part 8 : Clause 7 : 1990) or Multistage test up to 4 days duration (BS1377 : Part 8 : Clause 7 : 1990 and Technical Procedure TP38) Note: The 4 day price is the same for a single stage test or a multistage test, but a multistage test would incur more extra over days.	£ 150.00 per specimen
	Extra over days in excess of initial 4 days	£ 25.00 per day per specimen
	Remoulding single specimen	£ 17.50 per specimen
	Remoulding set of three 38mm diameter specimens	£ 17.50 per set of 3 specimens
	Notes:
	Caution: With fine-grained low permeability materials this test can have a long duration (eg. 1-2 weeks per stage) and correspondingly high charges due to the extra over days incurred. In this case, if there is nothing larger than fine gravel, a set of three 38mm diameter samples may work out less expensive than a multistage 100mm diameter specimen and will have a much quicker turnaround (typically within 2 weeks). Multistage tests on low permeability materials are particularly susceptible to long durations as each successive stage is slowed by the previous consolidation stage reducing the material's permeability.