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On August 1st 2009, the Laboratory for Mineral Binders and
Mortars and the Laboratory for Ceramics and Refractory Materials merged into a new organizational unit: the Laboratory for Cements, Mortars and Ceramics.
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Head of laboratory:
Vilma Ducman, M.Sc. |
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e-mail:
keramika@zag.si |
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phone:
+386 1 2804-438
+386 1 2804-275 (secretariat) |
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The Laboratory is accredited for the testing
of ceramic tiles, clay
roofing tiles, clay bricks and blocks according to SIST EN ISO/IEC
17025
(SA - Slovenian Accreditation - document No. LP-005). |
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The Laboratory for Ceramics and Refractory
Materials
Activities
- testing of clay-based building products, ceramic tiles, building
glass, refractory materials
- performance of expert studies about installed ceramic and brick products
- research and development work in the field of building ceramics
- arranging of education programs about ceramic and brick products
- audits of factory production control for the certification of brick
building blocks and other ceramic products
- participation in the preparation of Slovenian and European Technical
Approvals
Materials
Clay-based bricks and blocks:
- compressive strength (bedface and header)
- percentage of voids (by weighing in water and/or sand filling)
- thickness of walls, dimensions and correctness of shape
Clay-based roofing
tiles:
- bending strength
- impermeability to water
- resistance to weathering (freezing/thawing, crystallization of active
soluble salts)
- dimensions and correctness of shape
Ceramic tiles:
- breaking strength
- slipperiness of floor tiles (dynamic coefficient of friction - Tortus,
Pendulum, static coefficient of friction)
- resistance to weathering (freezing/thawing)
- resistance to chemicals (acids and alkalis)
- resistance to staining
- water absorption
- dimensions and correctness of shape
Building glass:
- assessment of the structure, after fracture, of hardened safety glass
- determination of the thickness of coatings on glass
Research and development
- Research into possibilities for the use of secondary raw materials
in the building materials industry.
- Research into possibilities for the use of industrial waste for the
production of lightweight aggregates.
- Expert studies and technical analyses about the use of raw materials
for the ceramic industry.
- Determination of the parameters of the freezing/thawing resistance
of ceramic building products.
- Monitoring of the properties of surfaces after exposure to mechanical
and/or chemical action (roughness, shine, microstructure, etc.).
Important projects realized since 2000:
| PROJECT |
Co-financer / Duration |
Development of light-weight aggregates from waste glass. |
MVZT*
1998-1999 |
POLISHCOVERINGS - Development of an efficient and environmentally
friendly polishing process for floor and wall coverings. |
CRAFT-1999-70904
2002-2004 |
Recycling - use of different types of waste in the production
of the clay-based industry. |
Slovenian producer from the stone-processing industry and from the
clay-based industry
1998-2003 |
Frost resistance of building ceramics (a bilateral Slovenian
- Serbia and Montenegro project) |
MVZT*
2005-2006 |
Useability of waste stone mud in the production of light-weight
aggregates.
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A Slovenian producer from the stone-processing industry, MVZT*
2004- |
* MVZT - The Ministry RS of Higher Education, Science
and Technology
Most important testing and measuring equipment
- several universal testing-machines for determining the mechanical
properties of ceramic products
- several climate chambers for the simulation of different types of
weather conditions within the temperature range +30°C do -30°C (freezing,
thawing, rain, wetting, soaking)
- a chamber for determining the impermeability to water of clay-based
roofing products
- laboratory and field testing equipment for determining the slipperiness
of floorings
- equipment for determining the amount of wear to ceramic floor tiles
- an autoclave with a vacuum pump for use in the pressure range between
0.1 and 5 bar
- several furnaces, with different volumes, for the firing of ceramic
products and other test specimens at temperatures of up to 1400°C
- a furnace for determining the pyrometric zone up to temperatures
of 1700°C
- equipment for the shaping and testing of brickmaking clay
Within the scope of the Department for Materials:
- a low-vacuum scanning electron microscope (SEM) and energy dispersive
x-ray spectrometer (EDS)
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