Laboratory soil tests

The tests of the certified geotechnical laboratory are standardised tests on soil samples that can be subdivided into tests for recognition and classification, mechanical strength and deformability tests, permeability tests, etc.

The following tests are available

DETERMINATION OF WATER CONTENT
(UNI EN ISO 17892-1:2015; minimum technical test time 24 hours):
determination of the water content (moisture) of a soil specimen by oven drying (average over several values), for each determination

DETERMINATION OF DENSITY
(UNI EN ISO 17892-2:2015):
determination of the density of fine-grained soils by the method of linear measurements, for each determination

DETERMINATION OF DENSITY USING A HYDROSTATIC BALANCE
(UNI EN ISO 17892-2:2015; minimum technical test time: 24 hours).
determination of the density of fine-grained soils by the water immersion method, including any paraffinisation of the test specimen, for each determination

DETERMINATION OF THE DENSITY OF SOLID GRANULES
(UNI EN ISO 17892-3:2016; minimum technical test time: 24 hours):
determination of the density of solid granules (average over two values) using the pycnometer method, for each determination

PARTICLE SIZE ANALYSIS FOR DRY SIEVING
(UNI EN ISO 17892-4:2017):
particle size analysis by dry sieving, on quantities of less than 3 kg, where practicable

PARTICLE SIZE ANALYSIS BY WET SCREENING
(UNI EN ISO 17892-4:2017; minimum technical test time: 48 hours):
particle size analysis by wet sieving of less than 3 kg

FULL PARTICLE SIZE ANALYSIS BY WET SCREENING AND BY SEDIMENTATION
(UNI EN ISO 17892-4:2017; minimum technical test time: 10 days):
complete particle size analysis by wet sieving on a quantity of less than 3 kg and by sedimentation of the fine part with an aerometer, excluding the determination of the density mass of the grains (the test execution requires the density mass value of the grain)

DETERMINATION OF LIQUIDITY AND PLASTICITY LIMITS
(UNI EN ISO 17892-12:2018; minimum technical test time 24 hours):
determination of liquidity and plasticity limits jointly

PERCENTAGE DETERMINATION OF ORGANIC SUBSTANCE MO (ASTM D 2974-87; minimum technical test time 48 hours)
percentage determination of organic matter, with muffle furnace at 440°C

DETERMINATION OF TOTAL LIMESTONE
(O.J. 25-5-1992; minimum technical test time: 24 hours):
carried out by means of the "Dietrich - Frühling" gasometer

DETERMINATION OF pH
(O.J. 25-5-1992; minimum technical test time: 48 hours):
according to official journal no. 121 of 25/05/92 method 7

SIMPLE UNCONFINED COMPRESSION TEST
(UNI EN ISO 17892-7:2018; minimum technical test time: 48 hours):
simple unconfined compression test with free lateral expansion type ELL

EDOMETRIC CONSOLIDATION TEST AT LOAD INCREMENTS
(UNI EN ISO 17892-5:2017; minimum technical test time: 15 days):
oedometric load increment consolidation test (IL) on specimens with a diameter less than or equal to 75 mm with each load step maintained for 24 hours, at a maximum pressure of 3200 kPa, for a maximum number of 8 increments in the loading phase and 4 in the unloading phase, for each test (the execution of the test requires the value of the volumetric mass of the grain)

DETERMINATION OF THE SECONDARY CONSOLIDATION COEFFICIENT
(UNI EN ISO 17892-5:2017; minimum technical time for carrying out the test depends on the characteristics of the sample):
determination of the secondary consolidation coefficient during the execution of the edometric test, with the load remaining over 24 hours. It is specified that for particular test conditions such as thickening of the load steps within the pre-consolidation pressure, reaching load levels exceeding 3200 kPa, the price must be estimated on a case-by-case basis

DIRECT SHEAR TEST ON UNDISTURBED SAMPLE TD
(UNI EN ISO 17892-10:2019):
direct shear test conducted on a die-cut specimen directly from an undisturbed cohesive specimen, performed with a Casagrande box with a square or circular cross-section of maximum dimension 60 mm, in a consolidated drained condition

DIRECT SHEAR TEST ON A REWORKED SPECIMEN WITH RECONSTITUTION OF THE SPECIMEN
(UNI EN ISO 17892-10:2019):
direct shear test conducted on reworked specimen reconstituted by manual pestling, performed with Casagrande box with square or circular cross-section of maximum dimension 60 mm in consolidated drained condition

LARGE DIRECT SHEAR TEST ON REWORKED SPECIMEN WITH SPECIMEN RECONSTITUTION
(UNI EN ISO 17892-10:2019):
direct shear test conducted on a reworked specimen reconstituted by manual pummelling, performed with a Casagrande box with a 300 mm or 150 mm square section in a consolidated drained condition

ISOTROPICALLY UNDRAINED CONSOLIDATED TRIAXIAL TEST (CIU)
(UNI EN ISO 17892-9:2018):
consolidated isotropically undrained triaxial test (CIU) with preliminary saturation by back pressure, excluding reconstitution of the specimen in the case of a reworked specimen

ISOTROPICALLY DRAINED CONSOLIDATED TRIAXIAL TEST (CID)
(UNI EN ISO 17892-9:2018):
triaxial consolidated drained triaxial test (CID) with preliminary saturation by back pressure, excluding reconstitution of the specimen in the case of a reworked specimen

UNCONSOLIDATED UNDRAINED TRIAXIAL TEST (UU) TUU
(UNI EN ISO 17892-8:2018; minimum technical test time: 48 hours):
unconsolidated undrained triaxial test (UU), excluding reconstitution of the specimen in the case of reworked specimen

MODIFIED AASHO COMPACTION TEST
(CNR year XII pt. IV no. 69/78; minimum technical test time: 48 hours):
modified AASHO compaction test with 5-point determination of the dry density/water content curve

DETERMINATION OF THE CBR INDEX
(UNI EN 13286-47:2006):
determination of CBR index with 6" cylindrical die

DIRECT PERMEABILITY TEST UNDER CONSTANT LOAD
(UNI EN ISO 17892-11:2019)
direct permeability test with permeameter at constant load, excluding reconstitution of the specimen in the case of a reworked specimen

DIRECT PERMEABILITY TEST AT VARIABLE LOAD
(UNI EN ISO 17892-11:2019)
direct permeability test with variable load permeameter, excluding reconstitution of the sample in the case of a reworked sample

DIRECT PERMEABILITY TEST IN AN OEDOMETER CELL
(UNI EN ISO 17892-11:2019)
direct permeability test in oedometer cell on specimen with diameter < 80 mm and height < 25 mm

DIRECT PERMEABILITY TEST IN TRIAXIAL CELL
(UNI EN ISO 17892-11:2019)
direct permeability test in triaxial cell, excluding reconstitution of the specimen in case of reworked specimen

The services provided by the Geotechnical Laboratory are aimed at all public and private entities.

Samples delivered to the Geotechnical Laboratory are at the client's own responsibility and expense. The delivery of the samples takes place with the signing of the Acceptance Report, which contains all the necessary information for carrying out the tests. Any changes shall be agreed upon, recorded and accepted by the parties.

The party requesting the laboratory tests must apply in writing. In the event that samples are delivered to the Laboratory through the person in charge of sampling, by post or courier, they must be accompanied by a note containing all the information necessary for the drawing up of the Acceptance Report.

Access to the service can take place at any time.

Testing times are related to the minimum technical time, workload and physical-mechanical condition of the samples, which can only be ascertained with certainty during testing. The issuing of certificates is also linked to the time required for their preparation and approval, and their delivery will take place once payment has been made.

Services provided to third parties shall be remunerated in accordance with the price list in force at the time of acceptance of the work order, and no discounts or concessions of any kind may be applied, with the exception of the Instrumental Bodies and Local Authorities of the Autonomous Province of Trento, to which a 50% discount shall be applied. Only services provided for Services and Provincial Agencies in the performance of their institutional activities shall be free of charge.

The Customer shall make payment before the delivery of the certificates and in any case within 30 days from the date of issue of the invoice. Payment via PagoPA of variable amount (see attached price list).