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1、BRITISH STANDARD BS 8204-5: 1994 Screeds, bases and in situ floorings Part 5: Code of practice for mastic asphalt underlays and wearing surfaces UDC 693.78.025.331:693.73 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:40:32 GMT+00:00 2006, Uncontrolled Copy,
2、 (c) BSI BS 8204-5:1994 This British Standard, having been prepared under the direction of Technical Committee B/544, was published under the authority of the Standards Board and comes into effect on 15 December 1994 BSI 03-1999 The following BSI references relate to the work on this standard: Commi
3、ttee reference B/544/6 Draft for comment 93/106952 DC ISBN 0 580 23079 1 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/544 Plastering, rendering, dry lining, screeds and in-situ flooring, to Subcommittee B/544/6 Scree
4、ds and in-situ floorings, upon which the following bodies were represented: Association of Lightweight Aggregate Manufacturers British Aggregate Construction Materials Industries British Resin Manufacturers Association Building Employers Confederation Chartered Institute of Building Concrete Society
5、 Contract Flooring Association Department of the Environment (Building Research Establishment) Department of the Environment (Property Services Agency) Federation of Associations of Specialists and Subcontractors Federation of Plastering and Drywall Contractors Federation of Resin Formulators and Ap
6、plicators (FeRFA) Mastic Asphalt Council and Employers Federation Mortar Producers Association National Federation of Terrazzo-Marble and Mosaic Specialists Scottish Master Plasterers Association Society of Chemical Industry Amendments issued since publication Amd. No.DateComments Licensed Copy: Lon
7、don South Bank University, London South Bank University, Fri Dec 08 05:40:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8204-5:1994 BSI 03-1999i Contents Page Committees responsibleInside front cover Forewordiii 1Scope1 2References1 2.1Normative references1 2.2Informative references1 3Definitions
8、1 4Exchange of information and time schedule1 4.1General1 4.2Exchange of information1 4.3Provision of utilities, facilities and materials2 4.4Time schedule2 5Materials and equipment2 5.1Mastic asphalt2 5.2Coarse aggregate2 5.3Separating membranes2 5.4Expanded metal lathing2 5.5Sand for rubbing2 5.6H
9、igh bond primer2 5.7Float3 5.8Gauges3 5.9Mechanical asphalt mixer3 5.10 Mastic asphalt cauldron3 5.11 Heated dumper3 5.12 Hot-charge transporter3 6Design3 6.1Selection parameters3 6.2Base to receive mastic asphalt3 6.3Mastic asphalt waterproofing5 6.4Drainage of floor areas (falls and channels to sh
10、ed water)5 6.5Effects of temperature5 6.6Mastic asphalt5 6.7Special applications7 6.8Mastic asphalt details7 6.9Regulating courses9 6.10 Tolerances on finished mastic asphalt flooring9 6.11 Mastic asphalt underlay9 6.12 Thermal and sound insulation9 6.13 Movement joints9 6.14 Slipperiness9 7Construc
11、tion work on site9 7.1Work planning9 7.2Preparatory sitework prior to asphalting10 8Workmanship10 8.1Re-melting10 8.2Transport of molten material10 8.3Setting out10 8.4Placing the separating membrane10 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:40:32 GMT
12、+00:00 2006, Uncontrolled Copy, (c) BSI BS 8204-5:1994 ii BSI 03-1999 Page 8.5Laying the flooring10 9Protection11 9.1On completion of laying11 9.2Between completion of laying and hand-over11 10Inspection and testing of flooring11 10.1 Inspection11 10.2 Testing11 11Maintenance of mastic asphalt floor
13、ing12 12Repair of mastic asphalt flooring12 Annex A (normative) Methods for the assessment of floor levels and surface regularity13 Annex B (normative) Determination of slip resistance value (SRV)13 Annex C (informative) Characteristics of mastic asphalt16 Figure 1 Flooring and skirting for wet area
14、s6 Figure 2 Drainage channel with light-duty grating6 Figure A.1 Slip gauges for checking surface regularity13 Figure B.1 Friction tester14 Table 1 Grades and thicknesses of mastic asphalt for underlays and wearing surfaces for various uses4 Table 2 Treatments for vertical and sloping surfaces to re
15、ceive mastic asphalt8 Table 3 Classification of surface regularity for mastic asphalt flooring and underlays10 Table B.1 Properties of the friction tester slider (soft rubber)16 Table B.2 Temperature corrections for SRV readings using soft rubber slider16 List of referencesInside back cover Licensed
16、 Copy: London South Bank University, London South Bank University, Fri Dec 08 05:40:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8204-5:1994 BSI 03-1999iii Foreword This Part of BS 8204 has been prepared under the direction of Technical Committee B/544 Plastering, rendering, dry lining, screeds
17、and in situ floorings. It gives recommendations for mastic asphalt flooring in buildings applied, as an underlay or as a wearing surface, to a concrete base or screed. Annex A and Annex B give test methods for surface regularity and slip resistance respectively, and Annex C gives some characteristic
18、s of mastic asphalt. A well laid mastic asphalt floor of the correct grade provides a hard, durable surface easily cleaned and not inherently slippery. It will carry heavy loads, providing care is taken to avoid static or mobile loads which may cause indentation. It is unaffected by water. Mastic as
19、phalt flooring is an adaptable material laid either as a wearing surface or as an underlay for decorative floor finishes. When laid as a mastic asphalt waterproofing membrane, it can be used in wet process areas or in areas where washing down is a requirement. BS 8204-5 is one of a series dealing wi
20、th in situ floorings; the other Parts of BS 8204 are as follows: Part 1:1987: Code of practice for concrete bases and screeds to receive in-situ floorings; Part 2:1987: Code of practice for concrete wearing surfaces; Part 3:1993: Code of practice for polymer modified cementitious wearing surfaces; P
21、art 4:1993: Code of practice for terrazzo wearing surfaces. An additional Part of BS 8204 dealing with cold setting resin wearing surfaces is to be prepared. BS 8204-5 supersedes section 4 (the last remaining section) of CP 204-2:1970. Sections 5, 6 and 7 and Appendix A of CP 204-2:1970 have been de
22、leted by amendment and CP 204-2:1970 is withdrawn. As a code of practice, this British Standard takes the form of guidance and recommendations. It should not be quoted as if it were a specification and particular care should be taken to ensure that claims of compliance are not misleading. A British
23、Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front co
24、ver, an inside front cover, pages i to iv, pages 1 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank Uni
25、versity, London South Bank University, Fri Dec 08 05:40:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:40:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8204-5:1994 BSI 03-19991 1 Scope This Part of BS
26、 8204 gives recommendations for the types and grades of materials, design and work on site for in situ mastic asphalt for flooring applied as a wearing surface or underlay, incorporating waterproof membranes where required. The standard is applicable to mastic asphalt applied hot to concrete bases a
27、nd screeds and concrete suspended floors. This Part of BS 8204 is intended to be read in conjunction with BS 8204-1:1987. 2 References 2.1 Normative references This Part of BS 8204 incorporates, by dated or undated reference, provisions from other publications. These normative references are made at
28、 the appropriate places in the text and the cited publications are listed on the inside back cover. For dated references, only the edition cited applies; any subsequent amendments to or revisions of the cited publication apply to this British Standard only when incorporated in the reference by amend
29、ment or revision. For undated references, the latest edition of the cited publication applies, together with any amendments. 2.2 Informative references This Part of BS 8204 refers to other publications that provide information or guidance. Editions of these publications current at the time of issue
30、of this standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Definitions For the purposes of this Part of BS 8204, the definitions given in BS 6100-1.3.3:1987, BS 6100-2.4.1:1992 and BS 8204-1:1987 apply, together with the following. 3.1 coat single la
31、yer of mastic asphalt 3.2 rubbing process by which the last coat of mastic asphalt is given a matt surface finish by the use of clean sand 3.3 spreader operative (craftsman) skilled in the laying and finishing of mastic asphalt 4 Exchange of information and time schedule 4.1 General Consultations an
32、d exchange of information between all parties concerned with the building operations should be arranged at an early date, so that each may have full knowledge of the particulars of the work and be able to cooperate in producing the conditions required by the others to complete a satisfactory job. 4.
33、2 Exchange of information The designer should provide in good time all relevant information to those responsible for laying the flooring and to others whose work could be affected, including whichever of the following are applicable: a) description, situation and address of site and means of access;
34、 b) those conditions of contract which could practically affect this particular work; c) location and area of floors to be covered; d) age and nature of the base and any preparatory treatment required; e) finished floor level and maximum permissible departure from datum; f) class(es) of surface regu
35、larity required for the bases and the finished mastic asphalt flooring; g) type of damp-proofing; h) type and thickness of screed, if any; i) any work consequent upon services passing through the flooring; j) treatment of skirtings; k) treatment of junctions with adjacent floors and floorings; l) ty
36、pe of surface finish; m) any special requirements related to underfloor heating; n) date for the completion of preliminary work; o) dates for the start and completion of various sections of the floor; p) details of any conformity testing required; q) requirements relating to samples of mastic asphal
37、t for testing purposes. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 05:40:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 8204-5:1994 2 BSI 03-1999 4.3 Provision of utilities, facilities and materials To prevent misunderstanding, particularly at the tenderi
38、ng stage, and to avoid possible situations detrimental to installation, it should be made clear who will be responsible for providing the following: a) adequate clean, dry, lockable storage space, protected from frost (if necessary); b) secure storage compound for gas bottles, having a fence not les
39、s than 2 m high; c) adequate ventilation in confined areas; d) adequate artificial lighting, if required; e) provision of a suitable level site for the mixer or mixers, blocks of mastic asphalt, and where relevant coarse aggregate, as close as practicable to the work; f) unloading and hoisting facil
40、ities, if required. 4.4 Time schedule In considering the schedule, in addition to the usual intervals between commencement and completion of work by the various trades involved, additional allowances should be made for the following: a) installation of all doors and windows and heating within the bu
41、ilding, which is especially relevant to laying grade I flooring (see 5.1); b) laying of underfloor services; preferably this should be completed before the base is formed, as there is a risk of subsequent cracking if services are embedded in the flooring; c) curing and drying of the base concrete be
42、fore the flooring is laid, where appropriate; d) cooling and hardening of the flooring; e) period of protection of the completed floor from damage by other trades, including restriction of access; f) siting of plant. 5 Materials and equipment 5.1 Mastic asphalt The mastic asphalt should be one of th
43、e following: a) mastic asphalt for flooring conforming to type F1076 of BS 6925:1988; b) coloured mastic asphalt for flooring conforming to type F1451 of BS 6925:1988; c) mastic asphalt for paving conforming to BS 1447:1988; d) mastic asphalt for waterproofing conforming to type R988 or type T1097 o
44、f BS 6925-1988. Types F1076 and F1451 mastic asphalt for flooring are graded according to usage as follows: grade I: special hard flooring; grade II: light duty flooring; grade III: medium duty flooring; grade IV: heavy duty flooring. Types F1076 and F1451 do not cover grades of mastic asphalt for s
45、pecial applications such as chemical resistant, or spark free, flooring, for which purposes proprietary variants are available, nor are they suitable for external applications such as loading bays, balconies and rooftop car parks for which paving grade mastic asphalt is specified in BS 1447:1988. Fo
46、r characteristics of mastic asphalt see Annex C. Mastic asphalt should be supplied cast into blocks suitable for transporting and handling or delivered to the site ready for use in hot-charge transporters. 5.2 Coarse aggregate Coarse aggregate for grade IV flooring should be clean igneous or calcare
47、ous rock or siliceous material conforming to the limits given in Table 5 of BS 6925:1988. Coarse aggregate for paving grades should be crushed rock conforming to the limits given in Table 3 of BS 1447:1988. 5.3 Separating membranes The separating membrane should be one of the following: a) glass fib
48、re tissue of mass 50 g/m2 to 70 g/m2; b) black sheathing felt comprising a batt of jute fibre impregnated with bitumen. 5.4 Expanded metal lathing Expanded metal lathing should be one of the following: a) bitumen coated plain expanded metal lathing with an aperture size of not less than 10 mm in the
49、 short way of mesh direction and not less than 0.46 mm thick; b) zinc coated steel, grade G 275 expanded metal lathing conforming to reference number L 2 of BS 1369-1:1987, suitably primed; c) stainless steel, grade 304 S15 expanded metal lathing conforming to reference number SL 1 of BS 1369-1:1987. 5.5 Sand for rubbing Rubbing sand should be clean sand from natural deposits, predominantly passing a 600 4m test sieve and retained on a 212 4m test sieve, both conforming to BS 410. 5.6 High bond primer A high bond primer, which is a modified syn
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