BS EN 14474:2004 – Precast concrete products — Concrete with wood-chips as aggregate — Requirements and test methods
1 Scope
This document specifies common requirements for wood-chip concrete, used in precast wood-chip concrete products. It is intended to be used when preparing documents for wood-chip concrete products. Wood-chip concrete product standards will define specific requirements, which may be additional to those given in this document. Product standards will give any limiting values.
Examples for the use of wood-chip concrete are: hollow blocks for flooring systems, shuttering blocks, slabs,facing elements, acoustic and/or thermal facing elements, partitioning elements, wine racks, etc.
It is not applicable to concrete for structural masonry units covered by EN 771 -3 and their ancillary components.
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 772-1 1 , Methods of test for masonry units – Part 11: Determination of water absorption of aggregate concrete, manufactured stone and natural stone masonry units due to capillary action and the initial rate of water absorption of clay masonry units
EN 772-1 4, Methods of test for masonry units – Part 14: Determination of moisture movement of aggregate concrete and manufactured stone masonry units
EN 1 2390-3, Testing hardened concrete – Part 3: Compressive strength of test specimens
EN 1 2390-5, Testing hardened concrete – Part 5: Flexural strength of test specimens
EN 1 2664, Thermal performance of building materials and products – Determination of thermal resistance by means of guarded hot plate and heat flow meter methods – Dry and moist products of medium and low thermal resistance
EN 1 2779:2004, Safety of woodworking machines – Chip and dust extraction systems with fixed installation – Safety related performances and safety requirements
EN 1 3501 -1 , Fire classification of construction products and building elements – Part 1: Classification using test data from reaction to fire tests
EN 1 3823, Reaction to fire tests for building products – Building products excluding floorings exposed to the thermal attack by a single burning item
EN ISO 354, Acoustics – Measurement of sound absorption in a reverberation room (ISO 354:2003)
EN ISO 1 0456, Building materials and products – Procedures for determining declared and design thermal values (ISO 10456:1999)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
wood-chip concrete
open structure concrete with 50% to 90% by volume (according to use) of the aggregate being wood-chips
BS EN 14474:2004 – Precast concrete products — Concrete with wood-chips as aggregate — Requirements and test methods