Date post: | 02-Jan-2016 |
Category: |
Documents |
Upload: | rocio-emma-tapia-alva |
View: | 18 times |
Download: | 1 times |
Administrative
Convenors• E R Miller BRE UK 1989-2003• G. Hora WKI D 2003-2005• P. Svane CC DK 2005-
Secretariate• B. Reinmüller DIN D 1989-
Members• Austria• Belgium• Denmark• Finland• France• Germany• Italy• Netherlands• Norway
• Poland• Portugal• Spain• Sweden• Switzerland• United Kingdom
• (11 active)
Standards• EN 927-1 Classification + selection• EN 927-2 Specifications• EN 927-3 Natural weathering test• EN 927-4 Withdrawn• EN 927-5 Water absorption test• EN 927-6 Accelerated weathering test• prEN 927-7 Knot staining test• prEN 927-8 Adhesion test• prEN 927-9 Tannin staining test
Classification of coating systemsEN 927-1
• End use
• Appearance
• Exposure conditions
• Non stable• Semi-stable• Stable• Build• Hiding power• Gloss• Mild • Medium• Severe
Complying with specifications
927-1Classification
927-2Specification
927-3Weathering test
927-5Water abs. test
EN 927-3 assessments
• Gloss• Colour• Chalking• Mould growth
Informative
• Blistering• Flaking• Cracking• Adhesion
Required to complywith specs (EN927-2)
Standards• EN 927-1 Classification + selection• EN 927-2 Specifications• EN 927-3 Natural weathering test• EN 927-4 Withdrawn• EN 927-5 Water absorption test• EN 927-6 Accelerated weathering test• prEN 927-7 Knot staining test• prEN 927-8 Adhesion test• prEN 927-9 Tannin staining test
prEN 927-7: Knot staining test
• Pinus sylvestris, sapwood with knots• Climatising• Machining, planing• 14 days pause• Coating• 3 days artificial exposure (EN 927-6)• Colour measurement on knots / background
17 years: 5 standards
• Is it worth it ?
• What did we do wrong ?
• How can we do better in the future ?
What did we do wrong ?
• Atmosphere unpleasant during first years• Weak user representation• Difficult rel. with National standardisation bodies
• Compromises instead of documented solutions• Gap between members and ”lab-guys”• Description sometimes ambigeous• Poor graphics
How can we do better in the future ?
• Social aspects• User representation ?• What is the role of National stand. bodies ?
• Active sub-groups• Round robins compulsory• Good illustrations, graphics