BS EN 12808-5-2008 pdf download.Grouts for tiles Part 5 Determination of water absorption.
This BS EN 12808-5 applies to all ceramic tile grouts for internal and external tile installations on walls and floors.
This European Standard specifies the test method to be used to determine the water absorption coefficient due to capillary action when the grout surface contacts the water without any additional pressure. The coefficient is measured by means of prisms.
This European Standard does not contain performance requirements or recommendations for the design and installation of ceramic tiles.
NOTE Ceramic tile grouts may also be used for other types of tiles (natural and agglomerated stones, etc). where these do not adversely affect the stones.
2 Normative references
The following referenced documents are inchspensable 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 196-1:2005, Method of testing cement — Part 1: Determination of strength
EN 1067, Adhesives – Examination and preparation of samples for testing
EN ISO 15605, Adhesives — Sampling (ISO 15605:2000)
3 Sampling
Take a sample of at least 2 kg of the product to be tested in accordance with EN ISO 15605 and EN 1067.
4 Test conditions
Standard conditions shall be (23 ± 2) °C arid (50 ± 5) % R.H. and a speed of air in the working area less than 0,2 m/s.
5 Test materials
Condition all test materials for at least 24 h under standard conditions.
6 Apparatus
6.1 Three gang mould with ground surfaces, made of steel, used foi the preparation of 40 mm x 40 mm x
160 mm prisms, in accordance with Clause 4.5 of EN 196-1:2005.
6.2 Jolting apparatus or jolting table used for the compaction of 40 mm x 40 mm x 160 mm grout specimen. in accordance with Clause 4.6 of EN 196-1:2005.
6.3 Tray with a flat base, large enough to contain three test specimens.
7 Mixing ofgrouts
The amount of water andlor liquid admix required for preparing the cementitious grout shall be as stated by the manufacturer in parts by weight, i.e. liquid to dry powder.
Prepare at least 2 kg of the grout in a mixer of the type described in Clause 4.4 of EN 196-1:2005, using the slow speed settings, (140 ± 5) r/min rotation and (62 ± 5) rtmin planetary movement.
Carry out the following procedure:
— pour the liquid into the pan:
— scatter the dry powder over the liquid:
— mixfor30s:
— take out the mixing paddle:
— scrape down the paddle and pan within 1 min;
— replace the paddle and mix for 1 mm.
Let the grout mature if and as specified in the manufacturer’s instructions, and then mix for a further 15 s. In the case of reaction resin grouts follow the manufacturer’s instructions.
8 Preparation of test specimens
Insert a 1 mm thick, rigid, plastic (e.g. PTFE) or metal divider into each compartment of the mould, approximately in the middle, parallel to the ends.
Mould the specimens immediately after the preparation of the grout. with the mould firmly clamped to the jolting table.
Introduce, using a suitable scoop, the first of two layers of grout into each of the compartments, directly from the mixing bowl. Spread the layer uniformly. then compact using 60 jolts.
Introduce the second layer of grout. level and compact with a further 60 jolts.
Lift the mould gently from the jolting table, strike off excess of material and smooth the surface with a flat trowel. Wipe off the grout left on the perimeter of the mould. Cover the mould with a glass plate according to
EN 196-1.
PLace the mould, suitably identified, on a horizontal base in standard conditions, (23 ± 2) C and
(50±5)%R.H.
After 24 h carefully remove the specimen from the mould.
Keep the demoulded prisms for 27 days in standard conditions leaving a clearance of at least 25 mm on all sides.
Prepare six specimens for each grout.BS EN 12808-5-2008 pdf download.