BS 8204-6:2008+A1:2010
$198.66
Screeds, bases and in situ floorings – Synthetic resin floorings. Code of practice
| Published By | Publication Date | Number of Pages |
| BSI | 2010 | 52 |
This part of BS 8204 gives recommendations for the design and installation of in situ synthetic resin flooring, based on liquid synthetic resin binders in which curing takes place by chemical reaction of the resin components, used internally in buildings. The synthetic resin floorings are bonded to direct finished concrete slabs, polymer-modified cementitious or fine concrete screeds and to existing concrete floors.
Annex A gives recommendations for the design and installation of resin terrazzo flooring.
Synthetic resin floorings applied to other materials such as timber or metal are not covered by this code of practice.
The installation of resilient sports surfacings based on synthetic resins is not covered by this code of practice.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 3 | Contents Introduction 1 1 Scope 1 2 Normative references 2 3 Terms and definitions 3 4 Exchange of information and time schedule 4 5 Materials 6 6 Design 7 7 Design and preparation of concrete bases and fine concrete screeds 23 8 Work on site 27 9 Blistering of the completed floor 31 10 Health and safety 33 11 Inspection and testing 33 12 Maintenance 35 Annexes Annex A (normative) The design and installation of resin terrazzo flooring 36 Bibliography 41 List of figures Figure 1 – Typical movement joints 18 Figure 2 – Typical transition joint 20 Figure 3 – Typical stainless steel drainage channel 21 Figure 4 – Typical floor-to-wall joint 22 Figure 5 – Typical service duct 23 List of tables Table 1 – Types of synthetic resin flooring 8 Table 2 – Classification of surface regularity 16 |
| 4 | Foreword |
| 5 | Introduction a) a strong permanent bond to the concrete base; b) resistance to a wide spectrum of aggressive chemicals; c) impermeability to liquids; d) toughness, durability, resilience and resistance to impact or abrasion; e) hygienic and easily cleaned surfaces; f) resistance to cracking; g) relatively thin applied thickness; h) rapid installation and curing with minimum disruption to normal operations. 1 Scope |
| 6 | 2 Normative references |
| 7 | 3 Terms and definitions 3.1 base 3.2 flooring 3.3 direct finished base slab 3.4 screed 3.5 screed material 3.6 levelling screed 3.7 synthetic resin 3.8 synthetic resin screed 3.9 departure from datum |
| 8 | 3.10 surface regularity 4 Exchange of information and time schedule 4.1 General 4.2 Selection of flooring to be applied a) the intended use of the synthetic resin flooring, including the type, extent and frequency of traffic; b) the type of loading (static or dynamic) and severity of impact; c) the details of all chemicals, including those used for cleaning or sterilizing, which could come into contact with the floor, and likely extent, frequency and temperature of any spillage; d) likely contamination in service and implications for slip resistance; e) the temperatures that the flooring is required to withstand in normal service or as part of the cleaning operations and whether exposure is by radiant or conductive heat or by direct contact; f) the uniformity and retention of colour, appearance and decorative effects, including the usage of multiple batches in large areas; g) the extent to which the flooring will be exposed to direct sunlight or ultraviolet light; h) the appearance and quality of finish; i) the need to reduce the risk of osmotic blistering (see 9.2); j) compliance with hygiene or food industry requirements; |
| 9 | k) type and frequency of cleaning available (see Clause 11); l) special requirements, such as fire resistance or anti-static characteristics; m) expected life of the flooring; n) thickness of flooring to be installed; o) time available for the application and curing of the flooring; p) age, specification where known and nature of the base, including information about any previous use of the floor that could affect adhesion, and any preparatory treatment required. 4.3 Information to be provided to the flooring contractor a) description, situation and address of site and means of access; b) those conditions of contract which could practically affect this particular work; c) location and area of flooring to be installed; d) finished floor level, falls and maximum permissible departure from datum in each location; e) class of surface regularity of the finished flooring; f) colour of the flooring to be applied, and a plan for the use of different batches as necessary; g) type of damp-proofing and insulation if present; h) type and thickness of any levelling screed proposed, and whether any curing compound is to be applied; i) type of finish of base or fine concrete screed; j) any work consequent upon services passing through the floor; k) treatment of joints; l) treatment of channels; m) treatment of skirtings and kerbs; n) treatment of junctions with adjacent floorings and doorway thresholds; o) any special requirements related to underfloor heating; p) the timing of the introduction of heating in the building; q) date for the completion of the base or fine concrete screed to receive the flooring; r) dates for the start and completion of the individual sections of the floor; s) details and frequency of any compliance testing required; |
| 10 | t) any potential restrictions on working hours; u) any limitations on installation due to production or other activities. 4.4 Information to be provided by the flooring contractor a) the extent of weatherproof areas to be provided for storage of raw materials and mixing of the flooring product and whether any temperature control is necessary; b) the ambient temperature requirements in the area where the flooring is to be installed; c) the power and lighting requirements to facilitate the laying operation; d) the protective screening to isolate the working area from adjacent facilities; e) the minimum time intervals after the flooring is installed before allowing foot traffic, vehicular traffic and water or chemical exposure; f) the protection necessary for the flooring between installation and final handover. 4.5 Time schedule a) curing and drying of the base concrete, fine concrete levelling screed, and/or polymer modified cementitious levelling screed; b) time between commencement and completion of work; c) period of curing and protection of the completed flooring from damage by other trades, including restriction of access. 5 Materials 5.1 General |
| 11 | 5.2 Synthetic resin types 6 Design 6.1 Selection parameters a) type and degree of traffic; b) temperatures to which flooring will be exposed; c) nature and duration of any chemical contact with the floor; d) wet or dry service conditions; e) slip resistance requirements; f) ease and method of cleaning (including hygiene requirements); g) moisture condition and temperature of the substrate; h) time available for application and curing of the flooring; i) ambient conditions at time of installation. |
| 12 | 6.2 Types of synthetic resin flooring Table 1 Types of synthetic resin flooring |
| 13 | 6.3 Durability 6.4 Timing |
| 14 | 6.5 Adhesion 6.6 Surface smoothness and slip resistance 6.7 Chemical resistance and resistance to staining |
| 15 | a) chemical constituents and concentration of likely spillage; b) temperature of the spillage; c) quantity and frequency of the spillage; d) presence of water and procedures for emergency wash-down; e) regular cleaning procedures; f) falls, drainage and sumps to be provided. 6.8 Colour and resistance to ultraviolet radiation |
| 16 | 6.9 Temperature resistance 6.9.1 Heat distortion temperatures 6.9.2 Nature and type of heat source 6.9.3 Duration of contact with the flooring |
| 17 | 6.9.4 Rate of change of temperature 6.9.5 Steam cleaning 6.10 Taint 6.11 Curing |
| 18 | 6.12 Reaction to fire |
| 19 | 6.13 Damp-proof membranes a) selection of a purpose-designed resin flooring that is able to tolerate high levels of moisture in the concrete slab; or b) installation of a membrane followed by a new unbonded fine concrete screed or an unbonded polymer modified cementitious scree… c) application of a synthetic resin surface-applied membrane: the compatibility of membrane, flooring material and any levelling… 6.14 Tolerances 6.14.1 General |
| 20 | 6.14.2 Tolerance to datum plane 6.14.3 Surface regularity Table 2 Classification of surface regularity |
| 21 | 6.15 Falls 6.16 Joints |
| 22 | Figure 1 Typical movement joints |
| 23 | Figure 1 Typical movement joints (continued) 6.17 Edge detail |
| 24 | Figure 2 Typical transition joint 6.18 Channels and gullies |
| 25 | Figure 3 Typical stainless steel drainage channel 6.19 Coved skirtings and kerbs 6.20 Service penetrations |
| 26 | Figure 4 Typical floor-to-wall joint 6.21 Stairs |
| 27 | Figure 5 Typical service duct 7 Design and preparation of concrete bases and fine concrete screeds 7.1 General |
| 28 | 7.2 Surface strength a) Using a rebound hammer in accordance with BS EN 12504-2:2001, Type N. This test should only be performed at locations that ha… b) By the pull-off method in accordance with BS EN 13892-8. The surface tensile strength should exceed 1.5 N/mm2. On old concret… 7.3 New concrete bases and fine concrete screeds 7.3.1 Design and construction |
| 30 | 7.3.2 Surface preparation 7.4 Old concrete bases |
| 31 | 8 Work on site 8.1 Storage 8.1.1 Fillers (including any pigments) and aggregates 8.1.2 Resin and hardener components 8.2 Preparation of base slab, fine concrete screed or polymer modified screed 8.3 Protection of base slab, fine concrete screed or polymer modified screed against damage and/or contamination |
| 32 | 8.4 Mixing 8.4.1 General 8.4.2 Mixing unfilled systems |
| 33 | 8.4.3 Mixing filled systems 8.5 Laying resin flooring 8.5.1 Priming the substrate |
| 34 | 8.5.2 Resin coatings (Types 1 to 3) 8.5.3 Multi-layer flooring (Type 4) 8.5.4 Flow-applied systems (Types 5 and 7) 8.5.5 Trowel-applied resin flooring (Types 6 and 8) |
| 35 | 8.5.6 Reinforcement 8.5.7 Curing the flooring 9 Blistering of the completed floor 9.1 General |
| 36 | 9.2 Osmotic blistering 9.2.1 Description 9.2.2 Prevention a) In new construction, care should be taken to ensure that the base concrete has a low level of soluble salts by avoiding poorl… b) New concrete or cementitious screeds should be allowed to dry out thoroughly after curing, to a relative humidity below 75%. It should be noted that a prolonged period may be required (see 4.5a)). c) Mechanical rather than chemical methods should be used to prepare the concrete surface (see 7.3.2). In particular, the use of acid etching should be avoided. d) The concrete surface should not be washed with detergent solutions as part of the preparation procedure. |
| 37 | e) All contamination from old concrete floors should be thoroughly removed. This may be difficult where the concrete has been saturated for long periods with water-soluble materials. f) Only polymer modified cementitious levelling screeds should be used in order to minimize permeability and salt migration. g) Water vapour permeable synthetic resin floorings should be used. h) Where impervious resin floorings are to be installed, solvent-free primers rather than water-borne systems should be used. i) Care should be taken to ensure that the synthetic resin flooring is precisely proportioned, either by mass or volume as specified by the manufacturer, and thoroughly mixed. 9.2.3 Repair a) A penetrating primer should be applied in two coats to the base to ensure complete coverage and maximum adhesion of the replaced flooring. b) The affected area should be replaced with a trowel-applied flooring (Types 6 or 8) at a thickness of at least 6 mm. c) The affected area should be replaced by water vapour permeable synthetic resin floorings. 10 Health and safety 11 Inspection and testing 11.1 Inspection a) quality and preparation of the base (see Clause 7); b) levels and surface regularity of the base (see 6.14); c) priming of the base (see 8.5.1); d) mixing of the synthetic resin flooring (see 8.4); e) levels and surface regularity of the finished flooring (see 11.3); |
| 38 | f) sealing, if any (see 8.5.5); g) curing (see 8.5.7); h) appearance (see 8.5.5). 11.2 Testing a) surface regularity (see 11.3); b) adhesion of the flooring to the base (see 11.4); c) slip resistance (see 11.5). 11.3 Surface regularity 11.4 Adhesion of the flooring to the base 11.4.1 General |
| 39 | 11.4.2 Quantitative test method 11.5 Slip resistance 12 Maintenance |
| 40 | Annex A (normative) The design and installation of resin terrazzo flooring A.1 Introduction a) by applying a conventional resin flooring of Types 6, 7 or 8, but generally incorporating a larger size of aggregate, and then grinding and polishing to a smooth finish; or b) by applying a more fluid resin flooring of Types 5 or 7 and then scattering the aggregate uniformly over the surface, rolling… A.2 Definition A.2.1 resin terrazzo A.3 Materials A.3.1 Aggregates for resin terrazzo flooring |
| 41 | A.3.2 Dividing strips A.4 Design A.4.1 General A.4.2 Surface regularity of the substrate A.4.3 Thickness A.4.4 Slip resistance |
| 42 | A.4.5 Timing A.4.6 Joints |
| 43 | A.4.7 Skirtings, covings, gullies and drains A.5 Installation A.5.1 Application of the resin flooring layer A.5.2 Grinding |
| 44 | A.5.3 Seals and polishes A.6 Cleaning and maintenance |
| 50 | Bibliography [1] THE CONCRETE SOCIETY. Concrete industrial ground floors: a guide to their design and construction. Technical Report No. 34. Second edition. Crowthorne (Berkshire): The Concrete Society, 1994. [2] ROGERS, M.R. and G. BARNBROOK. Concrete industrial ground floors: specification and control of surface regularity of free mo… |
