Characteristics and use:
COMCON® ZDV are interlocking sidewalk tiles with a special tactile surface (knobs) for the vision impaired, intended for outdoor signal, warning and tactile strips. They must not be used for any other purpose on publicly accessible surfaces and roads.
high tensile strength and tensile bending strength
high impact strength
high abrasion resistance
permanent resistance to freezing and thawing
permanent resistance to road salt and other de-icing products
permanent resistance to acid rain
permanent resistance to petroleum products
custom permanent colour
completely impermeable with negligible absorption
extremely weather- resistant, including UV radiation
antiskid even in poor weather
The surface of COMCON® ZDV tiles has regularly spaced knobs in the shape of truncated cones 4.5 mm high, spaced 50 mm apart; this makes them uniquely identifiable by a blind pedestrian using a white cane. The surface protrusions correspond to the requirements of technical guideline TN TZÚS 12.03.04. To achieve functional tactile contract required by Decree No. 369/2001 Coll., COMCON® CDR tiles at least 250 mm in width should be used. These tiles are can be produced in any colour, and are normally produced in white, black, dark grey and brown. Colours are achieved through the colour of the filler and binder used, and/or the use of permanent colours, mainly inorganic. Standard pigmentation ensures colour permanence even outdoors, and does not require any special maintenance.
COMCON® ZDV tiles are installed using dry lime or cement-lime mortar 3 to 5 cm deep, spread on a well-compacted substrate. These tiles are intended for foot traffic. A project engineer shall assess installation suitability for other load levels and applications.
Compressive strength > 80.0 MPa
Tensile bending strength > 18.0 MPa
Tensile strength > 12.0 MPa
Modulus of elasticity 15,000 MPa
Specific gravity 2200 – 2240 kg/m3
Abrasion resistance (Böhm) cm2 / cm2 < 0.15
Freezing resistance coefficient T150 0.99 – 1.00
Road salt resistance unlimited
Weather resistance unlimited
Coefficient of thermal expansion 6.16 x 10-5 /°C
Absorption < 0.05 %
Friction coefficient (pendulum test) 0.20 – 0.22
There are no special storage conditions, both interior and exterior storage is possible.
The manufacture proceeds in the conditions defined by ČSN EN ISO 9001:2009.
Guarantee and Service Life:
The guarantee for the COMCON® DV If correctly placed, their assumed service life is 5 let.