Vibration dampening tiles

Concrete tiles covered in a layer of rubber can be used in places where absorption of dynamic energy or noise is required, or in places where electrical voltages are present. An especially important characteristic of rubber-coated tiles is their high friction coefficient, which is why they are used in places where oil may be spilled on the surface, and with the choice of the proper mixture, in places the danger of the formation of ice is present.

The layer of rubber is applied to prefabricated tiles with the use of an advanced moulding technology. The effect of the technique, which is based on the removal of excess water from and air from the concrete, is high durability and toughness of the parts. These are confirmed by the results of testing.

The tiles, with dimensions of 90x90x10 cm, may be produced as single- or double-reinforced with steel meshes (e.g. an upper grid of 8 mmm thickness, a lower grid with 10 mm thickness, and openings of 140 mm).

The lagging of the grids is 3 cm, and the upper and lower lagging is 2 cm. In the calculations, a nominal wear resistance of 50 MPa was assumed.

TEST RESULTS

The physical and mechanical properties of the tiles were tested by Heriot-Watt University in Edinburgh, Scotland. Testing was conducted on samples with unreinforced tiles.

The fundamental results of the tests are presented below.

Resistance to wear 75 MPa
Resistance to bending 8.5 MPa
Absorption 4 %
Resistance to freezing no chipping or changes to durability after 150 cycles
Roughness of concrete very good

 

RANGE OF APPLICATIONS

Rubberised tiles are recommended in places where vibration and noise occur, as well as in regions where electrical “avalanche breakdown” can occur and where the formation of a layer of ice is a hazard, such as on loading ramps.

 

CONCRETE TILES (non-rubberised)

 

Tiles with a polished surface can be used for: footpaths, plazas, parking roads, and tiles and access roads in locations such as airports. Depending load transferred, it can be used for:
- unreinforced concrete – pedestrian traffic with minimal wheeled traffic.
- singe-reinforced tiles – car and light truck traffic, suspended pedestrian crossings,
- double-reinforced tiles – car and light truck traffic, suspended crossings for light cars.

It is recommended that the entire lower surface of the tiles be placed on a base layer, which assures their optimal performance and reliable use of the surface. For pedestrian traffic, the tiles may be placed on compacted sand or a cement and sand ballast, as with ordinary pavement tiles.

Due to thermal expansion and conditions of use, a gap is required between the tiles.   The gap between the tiles may be filled with sand where it is required by architectural considerations and where tiles are cleaned by hand. Where mechanical cleaning is employed or in places of dense wheeled traffic, the gaps should be filled with a plastic material such as rubber or polyurethane, which join the tiles and eliminate the possibility of distortions. Traditional cement mortar can also be used to join the tiles.

In yards where wheeled loads are present, unreinforced tiles may be used, as may single- or double-reinforced tiles. The tiles should be placed on a stabilised cement base. In the case of the use of the tiles in a yard with high loads, such as access roads and airport runways, it is necessary to draw up a technical design taking into account an analysis of ground conditions and definition of base layers depending upon projected surface loads.

The advantages of the use of these tiles are the speed of placement, easy access to natural earth, ease of movement of tile at sites threatened by aggressive factors, including chemical hazards, or on landfills. The use of the tiles allows rapid creation of surfaces even in winter. In places where the top layer of the base is flexible, such as on asphalt, the use of reinforced tiles is necessary.

 

TILES FOR OTHER METHODS OF SURFACE FINISHING

Another method is the creation of a composition of natural stone and concrete. Surfaces made from natural stone are not only expensive, but are also unable to handle large loads. The technology used in the production of the tiles guarantees that there is no danger of delamination of layers.

In a global analysis of the properties of the plates, it can be stated that test results show that its properties are more comparable to post-tensioned or pre-stressed concrete than to ordinary reinforced concrete, which is such an extremely important characteristic that it appears that the weight and thickness of the components are not important.

 
 

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ZWG IWINY

 

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