EN 1323:2007 – Adhesives for tiles – Concrete slabs for tests
1 Scope
This European Standard specifies the substrate (concrete slab) to be used for the determination of the properties of adhesives for tiles.
This European Standard does not contain performance requirements or recommendations for the design and installation of ceramic tiles.
NOTE Ceramic tile adhesives can also be used for other types of tiles (natural and agglomerated stones etc), if they do not adversely affect the stones.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 197-1, Cement — Part 1: Composition, specifications and conformity criteria for common cements
3 Test conditions
The standard conditions shall be (23 ± 2) °C and (50 ± 5) % relative humidity and the air speed in the working area less than 0,2 m/s.
4 Apparatus
4.1 Pull-head plates
Square metallic (e.g. steel, aluminium) plates, with dimensions of (50 ± 1) mm x (50 ± 1) mm and a minimum thickness of 10 mm with a suitable fitting for connection to the tensile testing machine.
4.2 Tensile testing machine
A tensile testing machine for direct pull tensile force test and with suitable capacity and sensivity for the test.
The machine shall be capable of applying the load to the pull-head plate at the rate of (250 ± 50) N/s, through a suitable fitting that does not exert any bending force.
4.3 Carsten-Röhrchen flask
Carsten-Röhrchen flask or other suitable apparatus for measuring the water absorption at the surface of the concrete slab (see Figure 1).
5 Concrete slab
5.1 Specification
The concrete slab shall be at least 35 mm thick, have a moisture content of less than 3 % by mass (carbide method) and have a water absorption at the surface after 4 h in the range of 0,5 cm 3 to 1,5 cm 3 measured by the method described in 5.4.
5.2 Manufacture of the concrete slab
The specification (see 5.1) can be achieved by using the following procedure to manufacture the concrete slab:
binder: Portland cement type CEM I 42,5 R in accordance with EN 197-1;
aggregate: gravel sand, of 0 mm to 8 mm particle size, continuous grading curve between A and B (see Figure 2);
mix ratio binder and aggregate: 1:5 in proportion by mass;
ultrafines content per m 3 of ready mixed concrete: 500 kg/m 3 prepared concrete. The concrete shall contain ultra fines in order to be properly workable and have a closed structure; the ultra fines content consists of cement and aggregate particle size up to 0,125 mm;
water/cement ratio: 0,5 by mass;
manufacture: vertically or horizontally in moulds, avoid the use of any mould release agent;
compaction: 90 s on a vibrating table at 50 Hz.
5.3 Conditioning of the concrete slab
The slabs shall be stored for 24 h under standard conditions, followed by six days water immersion at (20 ± 2) °C.
Before being tested the concrete slabs shall be stored separately, in vertical position, in a dry and ventilated environment, for at least three months and conditioned for 24 h under standard conditions.
EN 1323:2007 – Adhesives for tiles – Concrete slabs for tests