Technical data (dilatation joints)
To obtain a strong bond to concrete, stone or brick, special designed tapes are required.
Initially it seems a rather simple application however the various ways of construction/application, the various substrates and the necessary durability require a tailor made range for this. The tape functions as a secondary moisture barrier, applied as well in horizontal as in vertical position, its bonding must be superior. The tape must stay flexible and not sensitive for desiccation or other external influences.
The product is intend to function for long periods (lifetime building) and must be resistant against movements (dilatation) of these surfaces. The far most important factor having its influence on dilatation movements is temperature. In order to calculate the expected movements we need to know the minimum and maximum temperature of the surface and also the application temperature. In the calculation example under mentioned we assume a min. temp. -15°C and a max. temp +60°C; the application temperature is between +5°C and +30°C
The biggest temperature difference is +55°C. In order to calculate the maximum dilatation movements we need to know the dilatation coefficient of the surface:
Brick 0,005mm/m1
Concrete/stone 0,012mm/m1
Aluminum 0,024mm/m1
Calculation example:
Dilatation between concrete plates of 2,5meter
Expected dilatation movement (maximum) is: 55 x 0,012 x 2,5 = 1,65mm
(by calculation the most unfavourable temperature a safety margin is used)