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Transport infrastructure laboratory

Is accredited for the testing of these materials:

  • concrete in fresh and hardened state, including construction-site tests and taking core borehole samples,
  • mortar in fresh and hardened states,
  • screed materials,
  • soil - laboratory and field tests,
  • aggregates - graininess,

and conducting select tests of building constructions, surfaces and construction layers of roadways.

Other tests and surveying are done in non-accredited mode. We also offer consulting and advisory services that focus on matters of materials and transport infrastructure building constructions.

Accredited measuring

The list of accredited tests can be found below:

Accreditation certificate  [ 448.13 KB]

Contact:

Other tests and measuring

Non-destructive diagnostics


We conduct the visual examination, road deflection measurement using the FWD impulse device, or georadar measuring, and collecting bore and probe samples for use in lab tests.

Contact: Ing. Ilja Březina, ilja.brezina@cdv.cz – roads with asphalt surface
Ing. Jiří Grošek, Ph.D., jiri.grosek@cdv.cz – roads with concrete surface

We offer measurement of road deflection, calculating layer flexibility modules and propositions for road reinforcement. We use the RODOS impulse device FWD/HWD.

Contact: Ing. Ilja Březina, ilja.brezina@cdv.cz – roads with asphalt surface
Ing. Jiří Grošek, Ph.D., jiri.grosek@cdv.cz – roads with concrete surface

We conduct continuous measuring of layer thickness, placement of built-in reinforcements, non-homogeneity searches and other applications. For the measurement of speeds from walking up to 80 km/h, we use a two-channel system by GSSI and antennas with the frequencies ranging from 250MHz to 2,6 GHz (in-depth reach up to 5 m).

Contact: Ing. Michal Janků, michal.janku@cdv.cz

We conduct static and continuous measurements using FLIRinfrared thermocameras. Thermal images from the handheld thermocamera are usually delivered with digital photographs of the measured object. Parallel with the continuous recording, a digital videoreconrding is made of the monitored objects with information about the location of the measurement.

Contact: Ing. Michal Janků, michal.janku@cdv.cz

We offer the measuring road surface unevenness and measuring deformations of concrete surface of roads by a Stradis rolling profile measurement machine. The accuracy of this measurement is 0,01 mm, and the device allows for the calculation of the IRI parameter.

Contact: Ing. Jiří Grošek, Ph.D., jiri.grosek@cdv.cz

We conduct continuous monitoring of height changes during the deformations of concrete road panels, during the construction of bridges, the construction of mounds of roads etc. We use a device developed in cooperation with the Research Institute of Geodesy, Topography and Cartography, which allows us to watch the changes with a standard deviation σ ≤ 0,05 mm. Two sensing heads are used – one referential and one measuring.

Contact: Ing. Jiří Grošek, Ph.D., jiri.grosek@cdv.cz

We plant tensometers on the monitored constructions and elements (on surface or built-in) and provide the reading of the tension values during their usage/stress. For data collection, we use a 16-channel switch-board QuantumX MX1615B.

Contact: Ing. Jiří Grošek, Ph.D., jiri.grosek@cdv.cz

Tests for concrete and its components


We conduct analyses of bores and samples drawn from concrete constructions. We determine the incidence of alkali silica gels (ASR), secondary sulphate expansion (ettringite and thaumasite), portlandite etc. Using a Tescan Vega (SEM) scanning electron microscope, we evaluate the level of filling of the voids/capillaries with these products in relation to the creation of expansive/contracting microcracks. By the means of energy dispersive x-ray spectroscopy (EDX), we determine the percentual volume of K2O, Na2O, SO3, Cl- and the like, as well as the major oxides in the relics of portland cement clinker.

Contact: Ing. Aleš Frýbort, ales.frybort@cdv.cz

We conduct micro-petrographic analyses of individual fractions of aggregates sampled from the evaluated quarries; on the prepared sections, we determine the percentual representation of rocks and minerals using an Olympus BX53 petrographic (optical polarising) microscope.

Contact: Ing. Aleš Frýbort, ales.frybort@cdv.cz

We offer explorative identification of the occurence of alkali silica gels, which is done on the breaking or cutting area of concrete (in the lab or in the field). We use two reagents: first, we apply Trisodium Hexanitrocobaltate Na3Co(NO2)6, and in the second phase, rhodamine B. The resulting color shade is connected to the presence of the elements K, Na and Ca. This method is sometimes called Los Alamos.

Contact: Ing. Jana Štulířová, jana.stulirova@cdv.cz

Geotechnical testing


We conduct long-term, cyclical load tests of road formations in controlled conditions in a laboratory geotechnical testing field (LGTF: 9 x 3 m, depth 2,2 m), with an option to regulate the water regime in the examined construction during the test.

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The test is done either in the lab or on-site.

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The test is done with a ram weighing 10 kg.

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Besides the static load tests or tests using a light dynamic plate, we conduct the evaluation of toughness/flexibility module of subsoil and base layers of the road on-site using the Humboldt Mfg. Co. GeoGauge device (ASTM D6758). The advantage of it is speed – ca. 20 test sites per hour.

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