Adhesives for tiles are classified and labelled in accordance to PN-EN 12004+A1:2012 standard. The standard lists 3 types of adhesives:
C – cement adhesives
D – dispersion adhesives
R – adhesives based on reactive resins
Each of three types of adhesives can be offered in various types (classes), referring to additional requirements:
1 – standard setting adhesives; adhesion after 28 days ≥ 0.5 N/mm2
2 – adhesives of improved parameters; adhesion after 28 days ≥ 1.0 N/mm2
F – fast-setting adhesives; adhesion after 6 hours ≥ 0.5 N/mm2
T – adhesives with reduced slip; slip not exceeding 0.5 mm
E – adhesives with extended open time; adhesion after 28 days ≥ 0.5 N / mm2, despite the fact that time between application of adhesive and placing a tile is not longer than 30 minutes
S1: Deformable (deformity of ≥ 2.5mm to ≤ 5mm)
S2: Highly Deformable (deformity of ≥ 5mm)
Before fixing ceramic or natural stone cladding, one should pay particular attention to a few elements significant for proper selection of an adhesive.They are as follows:
substrate – material which it is made of, its absorptiveness, bonding, cleanliness, stabilization degree and possible deformability,
tiles – type (gres-porcelain, terracotta, glazed, stone), size (mosaic, large size), absorptiveness and resistance to discolouration,
conditions of cladding use – influence of atmospheric factors (indoors or outdoors), location (wall or floor), type and range of live load (foot or vehicle traffic), frequency and range of temperature changes.
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