Laboratory services

11 modified scaled

At TESELA we have more than 25 years of experience and we offer you a team of experts from different fields (chemists, engineers, art historians, doctors and geologists) that allows us to develop, certify and validate the different materials, processes and products.

Our materials laboratory offers a comprehensive support service adapted to the needs of each heritage project or innovation on materials, offering technical assistance on site and actively collaborating.

Laboratory analysis and testing:
  • Characterisation of materials.
  • Determination of alteration forms.
  • Determination of physical-mechanical properties.
  • Artificial ageing tests.
On-site testing to determine intervention methodologies:
  • Cleanliness tests.
  • Selection of conservation treatments (consolidants, water repellents) and protection (anti-graffiti treatments, painting).
  • Adherence tests (mortars and paints).
  • Colorimetric studies.
  • Studies for the definition of the working system in the project phase, thus adjusting the proposed treatment and its economic scope to reality.
6 1
DSC 0009 e1524483402163
Control and monitoring of pathologies. Preventive conservation
  • Management and implementation of quality controls.
  • Study and design of restoration mortars.
  • Monitoring of cracks and fissures.
  • Monitoring of capillary dampness and evaluation of damp-proofing systems.
  • Drawing up reports, intervention proposal reports, plans and quality control improvements.
  • Selection of the most suitable products for any type of restoration during the construction phase.

Some of our trials and analysis

  • Friability coefficient in aggregates
  • Determination of fines in aggregates
  • Determination of the alkali-silica and alkali-silicate reaction. Chemical method
  • Determination of alkali-carbonate reactivity in aggregates
  • Fineness module in aggregates
  • Alkali-silica potential reactivity. Accelerated method on mortar specimens
  • Potential reactivity of aggregates with alkalis. Concrete prism method
  • Determination of pH of water for mortar mixing and test specimens
  • Clay lumps and other friable particles in aggregates
  • Cleanliness coefficient
  • Determination of water-soluble chlorides by Volhard’s Method
  • Light pollutants
  • Humus content in aggregates
  • Water-soluble sulphate content.
  • Total sulphur content by acid digestion
  • Water-soluble materials
  • Calcination loss
  • Acid soluble sulphates.
  • Chemical analysis of cements
  • Magnesium sulphate test, except evaluation of complete aggregate particle sizes
  • Freeze-thaw resistance
  • Thermal shock resistance in aggregates
  • Specific surface area of binders and additives
  • Elemental analysis CHNS
  • Determination of sieving grain-size curves
  • Thermogravimetry (TG) (10ºC/min, air atmosphere)
  • Chemical analysis of organic and inorganic compounds by means of Infrared Spectroscopy (FTIR).
  • Flexotraction and compression resistances
  • Determination of resistance to capillary absorption
  • Chemical-mineralogical analysis
  • Infrared thermography of facings/floors
  • Determination of adhesion
  • Adhesion after immersion in water
  • Transverse deformation
  • Determination of the bond strength of mortars
  • Water tests (determination of the water vapour permeability coefficient)
  • Water tests (determination of the coefficient of capillary absorption)
  • Determination of water holding capacity
  • Wetting capacity
  • Volatile and non-volatile matter
  • Ash content by direct calcination
  • Determination of initial adhesion
  • Hardening time
  • Determination of air content in fresh mortar
  • Open time of fresh mortar
  • Run-off time (flow)
  • Initial and final setting time (Vicat)
  • Determination of workability. Run-off test of thixotropic mortars
  • Determination of the workability of products to be applied via runoff
  • Determination of workability. Concrete run-off test for repairs
  • Determination of flexural and compressive strength of hardened mortar
  • Chloride test on masonry mortars
  • Rheological analysis of lime pastes
  • Determination of workability. Application of repair mortars on substrates
  • Determination of the carbonation depth in hardened concrete by the phenolphatelin method
  • Determination of the bulk density of powdered mortar
  • Determination of the bulk density of fresh mortar
  • Determination of the bulk density of hardened mortar
  • Determination of the consistency of fresh mortar by means of a shaking table
  • Workability time
  • Determination of compressive strength (including shearing and specimen preparation)
  • Determination of physical characteristics of hardened mortar (including mortar preparation, determination of density, moisture content, shrinkage value, flexural and compressive strength).
  • Digital image analysis
  • Microstructural, textural, and chemical characterization by scanning electron microscopy
  • Determination of the dimensional variation curve of the mortar (from time zero) for 48 hours.
  • Compatibility of rendering mortars with masonry substrates
  • Determination of the carbon dioxide permeability
  • Resistance to carbonation
  • Chemical analysis of organic and inorganic compounds by means of Infrared Spectroscopy (FTIR).
  • Analysis of the attack of xylophagous insects on wood.
  • Analysis of microbiological attacks.
  • Study of the microbiota present in a sample of stone material to determine the presence of carbonatogenic bacteria to guarantee the effectiveness of the bioconsolidation treatment.
  • Analysis of the causes of biodeterioration.
  • Porosity and permeability to gases and vapours of organic supports.
  • colourimetry
  • UV spectrophotometry
  • Electron microscopy (SEM)
  • Fourier transform infrared spectrophotometry by attenuated total reflectance (FTIR-ATR).
  • UV lamp examination.
  • Analysis by Raman spectroscopy.
  • Mineralogical analysis by X-ray diffraction (XRD) (including sample preparation, identification of mineral phases and semi-quantitative analysis).
  • Elemental chemical analysis by X-ray fluorescence (XRF).
  • Study of the porous system by mercury injection porosimetry (MIP).
  • Accelerated aging tests (freeze-thaw cycles).
  • Petrographic study (including thin film preparation, study by polarised optical microscopy and microphotographs).
  • Durability test in climatic chamber.
  • Water tests (determination of the coefficient of capillary absorption, water vapour permeability, absorption and drying at atmospheric pressure).