Test Like Crazy

There’s only one way to find out how cementitious construction materials behave under certain conditions: testing, testing and more testing. And that’s exactly what WACKER experts are doing at the technical competence center in Burghausen – and at other sites all over the world. Always with the aim of finding perfect formulations for unique applications.

One focus of the work at the Burghausen technical center is on testing according to current standards. The results of these tests serve as a basis for comparison while also allowing us to determine in advance whether a given formulation can obtain official certification.

We perform all of the definitive testing methods described in the relevant standards. We have also drawn on our many years of experience to develop some test methods of our own, providing our customers with even more insight into their products.

Tests for Tile Adhesives

We test the adhesion of tile adhesives to different substrates in the lab under specific environmental conditions. We also determine the wetting capability, open time and slip as a proxy for good processing properties. Flexibility is a further test area, as it is essential for ensuring that a tile adhesive can cope with thermal or mechanical stress.

Ball Impact Test

The ball impact test reveals the benefits of polymer-modification in tile adhesives:

the enhanced flexibility prevents tiles from cracking due to impacts.

Determination of Slip

Determination of slip as defined in EN 12004-2: in the WACKER method, an additional force is exerted on the tile in order to test green strength.

Deformation Test

The deformation test measures a tile adhesive’s flexibility and consists of a three-point flexural test to determine the maximum deflection of a 3-mm grout prism.

Tensile Adhesive Strength Test

The tensile adhesive strength test is a key analysis and reveals how strongly tile adhesives bond to cementitious substrates after different types of conditioning: standard conditions, water immersion, heat aging, and freeze-thaw cycles. In Burghausen, we have the capability to simultaneously expose a large number of test specimens to freeze-thaw cycles.

Grout Tests

Our tests reveal whether a tile grout prevents water penetration and how it is affected by abrasive cleaning or thermal stress, among other things.

Abrasion Resistance

Determination of resistance to abrasion according to EN 12808-2: test specimens consist of 10 x 10 x 1 cm grout prisms clamped into a joint abrasion device that has been equipped with a grinding medium. The volume of abraded material is then measured.

Flexural/Compressive Strength Test

Flexural and compressive strength are tested following dry conditioning and freeze-thaw cycling. The standard test method stipulates a flexural strength of ≥ 2.5 N/mm2 and a compressive strength of ≥ 15 N/mm2.

Shrinkage Testing

The shrinkage measurement reveals whether hardening is accompanied by a change in volume.

Tests for External Thermal Insulation Composite Systems (ETICS/EIFS)

The durability of external insulation composite systems is tested by determining the bond strength, flexibility and impact resistance of the embedding coat and adhesive mortar.

Testing for Impact Resistance

To test the impact resistance of a reinforced insulating material, we simulate the damage done, for example, to a wall by bicycle handlebars or hailstones.

Bond Strength Testing

Here we test the bond strength between the substrate and the insulation, adhesive mortar and embedding coat.

Tensile Adhesive Strength and Impact Resistance Tests

At our EOTA test center in Burghausen, we install customer systems along entire walls. After rain-heat-cold cycles, we then subject the test walls to tensile adhesive strength and impact resistance testing.

Tests for Renders/Plasters and Wall Troweling Compounds

Weatherability and UV resistance, water-repellency and mechanical strength are key properties of renders/plasters and wall troweling compounds. Our labs in Burghausen are fully equipped to test these properties in compliance with standard test methods.

Flow Value Determination

Determining the flow value helps to assess the consistency of the fresh mortar.

Air Content Testing

The mortar is compacted on a vibrating table. The air content then is determined as per DIN 18555-2.

Test for Capillary Water Absorption

The render/plaster is applied to disks of aerated concrete. Capillary water absorption is then measured as per EN 1015-18.

Water repellency may also be tested using the Karsten tube test.

Tests for Waterproofing Membranes

Waterproofing membranes are tested for their impermeability and their ability to bridge cracks. We employ different test methods to obtain the most robust information possible.

Water Impermeability Test

Test for watertightness: cardboard boxes can be waterproofed with 1 - 2 mm coats of polymer-modified waterproofing membranes.

Test for Elongation at Break

Test specimens are punched from a waterproofing membrane and then tested for their elongation at break as per ISO 527-1.

Test for Crack-Bridging Ability

The ability of a flexible coating to compensate for a crack in a substrate is tested as per EN 14891. The crack-bridging test is captured on camera and can be performed under standard climatic conditions or at temperatures below freezing.

Tests for Self-Leveling Flooring Compounds

Self-leveling flooring compounds contain at least 10 ingredients. The formulations are complex and generally tailored to specific applications. Flowability, pumpability, drying time and emissions are just some of the criteria we check.

Shrinkage Testing

This test measures the shrinkage of a specimen bonded on one side to a metal strip.

Spreading Test

This test measures the spread of a given volume of mortar on a non-absorbent substrate after 1 and 15 minutes.

Abrasion Test

The abrasion test as per EN 13982-5 measures the wear induced by a rolling cyclic load of 2,000 N over 10,000 rotations. Sanding properties / resistance to abrasion can also be measured via the Taber test (with rotation).

Check Us Out Today!

Take a closer look at our Burghausen technical competence center: our interactive PDF presents our equipment and labs and explains the tests and inspections performed here.

You can download our interactive PDF from the box on the right.