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1、BRITISH STANDARD BS 5803-3: 1985 Incorporating Amendment No. 1 Thermal insulation for use in pitched roof spaces in dwellings Part 3: Specification for cellulose fibre thermal insulation for application by blowing UDC 699.86:692.42:677.46 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:17:
2、56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5803-3:1985 This British Standard, having been prepared under the direction of the Elements and Components (of Diverse Materials) for Buildings Standards Committee, was published under the authority of the Board of BSI and comes into effect on 28 Febr
3、uary 1985 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference ECB/38 Draft for comment 83/10119 DC ISBN 0 580 14244 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Elements and Components (
4、of Diverse Materials) for Buildings Standards Committee (ECB/-) to Technical Committee ECB/38 upon which the following bodies were represented: Chartered Institution of Building Services Consumer Standards Advisory Committee of BSI Department of the Environment (Building Research Establishment, Fire
5、 Research Station) Department of the Environment (Housing and Construction Industries) Department of the Environment (Property Services Agency) Eurisol (UK) (Association of Manufacturers of Mineral Fibre Insulation) Greater London Council Independent Waste Paper Processors Association Institution of
6、 Building Control Officers National Association of Loft Insulation Contractors National Council of Building Materials Producers Royal Institute of British Architects Thermal Insulation Manufacturers Association Amendments issued since publication Amd. No.Date of issueComments 5829June 1989Indicated
7、by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5803-3:1985 BSI 08-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Definitions1 3Composition and form1 4General properties1 5Ther
8、mal insulation properties2 6Preparation of samples2 7Marking2 Appendix A Method for the measurement of the installed thickness, coverage and density of cellulose fire insulation3 Appendix B Method of test for corrosivity3 Appendix C Determination of settlement at high humidity7 Appendix D Determinat
9、ion of vibration settlement and settled density8 Appendix E Effect of thermal insulation on domestic PVC sheathed electrical cable10 Appendix F Determination of thermal properties11 Figure 1 Plan of simulated loft area for the determination of coverage and installed thickness5 Figure 2 Measuring dev
10、ice6 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5803-3:1985 ii BSI 08-1999 Foreword This Part of BS 5803, having been prepared under the direction of the Elements and Components (of Diverse M
11、aterials) for Buildings Standards Committee. This Part covers the requirements for cellulose fibre thermal insulation for application by blowing. Material used for thermal insulation in pitched roof spaces in dwellings should not sustain vermin or encourage the growth of fungus either when dry or we
12、tted with clean water. It should also be free from objectionable odour when in normal use and when wetted with clean water. As these properties are of a subjective nature it is not possible to derive methods of test for them. They are not therefore included in the requirements for the materials cont
13、ained in this Part but in considering the applicability of the materials in this Part they have been taken fully into account. BS 5803 comprises the following Parts: Part 1: Specification for man-made mineral fibre thermal insulation mats; Part 2: Specification for man-made mineral fibre thermal ins
14、ulation in pelleted or granular form for application by blowing; Part 3: Specification for cellulose fibre thermal insulation for application by blowing; Part 4: Methods for determining flammability and resistance to smouldering; Part 5: Specification for installation of man-made mineral fibre and c
15、ellulose fibre insulation. Certification. It is strongly recommended that in view of the nature of this specification, manufacturers and purchasers make use of the certification facilities described on the inside back cover of this standard. A British Standard does not purport to include all the nec
16、essary 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 cover, an inside front cover, pages i and ii, page
17、s 1 to 12, 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: sheffieldun sheffieldun, na, Mon Dec 04 16:17:56 GMT+00:00 2006, Unc
18、ontrolled Copy, (c) BSI BS 5803-3:1985 BSI 08-19991 1 Scope This Part of BS 5803 specifies requirements for cellulose fibre thermal insulation for installation by blowing in pitched roof spaces in dwellings. This Part does not apply to other forms of thermal insulation, and does not deal with method
19、s of installation of insulating materials or with the general principles of insulation of pitched roofs. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Definitions For the purposes of this Part of BS 5803, the definitions given in BS 874-1 and
20、BS 3533 apply together with the following. 2.1 usage the mass of blown fibre per unit area installed at a given thickness (in kg/m2) 2.2 bag usage rate the number of bags of stated mass per 100 m2 of insulation installed at a given thickness 2.3 coverage the reciprocal of usage (in m2/kg) (see Appen
21、dix A) 2.4 bag coverage rate the coverage multiplied by the stated mass of a bag of insulation (in m2 per bag) 2.5 R value thermal resistance (in m2K/W) assessed at the appropriate thickness (see Appendix F) 3 Composition and form The insulating material shall be composed of cellulose (wood-based) f
22、ibres treated with fire retardant and biocidal additives. The material shall not contain extraneous foreign materials such as metal or glass. 4 General properties 4.1 The material shall not contain water soluble substances likely to accelerate the corrosion of metallic surfaces with which it comes i
23、nto contact. It shall be deemed to be free from corrosive constituents if, when tested in accordance with Appendix B, no perforation of any of the metal coupons is evident. 4.2 The materials shall not exhibit more than 5 % settlement when tested in accordance with Appendix C. 4.3 The percentage sett
24、lement shall not exceed the value declared in item g) of clause 7 when tested in accordance with Appendix D. NOTEThis test is intended to simulate the effect of traffic vibration, heavy footsteps, door slamming, etc. over a period of many years. 4.4 The material shall have no deleterious effect on P
25、VC or similarly covered electrical wiring. When tested in accordance with Appendix E, the material shall be deemed to be satisfactory if all four of the cable test pieces show no cracks in their sheathing. Any discoloration of the insulation or discoloration of the cable sheathing, or both, shall be
26、 noted as indicative of plasticizer migration, but does not in itself constitute failure. 4.5 When the material is tested at the settled density in accordance with BS 5803-4: a) in the flammability test, the combustion zone shall not extend to within 25 mm of any part of the timber surround in any o
27、f the five specimens tested; and b) in the smouldering resistance test, the combustion zone shall not extend to more than 150 mm from the centre line of the ignition cylinder on more than one of the first five specimens tested. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:17:56 GMT+00:0
28、0 2006, Uncontrolled Copy, (c) BSI BS 5803-3:1985 2 BSI 08-1999 If one of the specimens gives a combustion zone extending more than 150 mm from the centre line of the cylinder, a further set of five specimens shall be tested and they shall all comply with this requirement. 5 Thermal insulation prope
29、rties 5.1 The manufacturer shall declare the installed and settled thickness needed to achieve R values of 2.0, 2.5, 3.0, 3.5, 4.0, 4.5 and 5.0 m2K/W after settlement, calculated in accordance with F.4.2 and F.4.1 respectively. NOTEThe installed thickness required to yield R values other than those
30、declared by the manufacturer may be determined by interpolation or extrapolation. 5.2 The actual value of R, when calculated in accordance with F.4.3, shall be not less than 90 % of the manufacturers declared (or interpolated) value. 6 Preparation of samples Samples for verification of compliance wi
31、th the requirements of clause 4 shall be prepared by blowing through a commercially available blowing machine to the average installed density marked on the packaging see item h) of clause 7. 7 Marking Each bag (or package) shall be legibly and indelibly marked with the following. a) The number and
32、date of this British Standard, i.e. BS 5803-3:19851). b) The manufacturers name, mark or symbol. c) Type of material. d) Action to be taken in the event that the material becomes accidentally soaked. e) Bag mass. f) A table, giving R values and corresponding thickness information as specified in 5.1
33、, together with coverage information based on the definitions and values given in 2.2, 2.4 and items e) and h) of this clause, as follows. g) Maximum percentage settlement. h) Average density as installed and after maximum settlement. i) Thermal conductivity (2) as settled density and a mean tempera
34、ture of 10 C. j) Health and safety requirements regarding inhaling or ingesting dust. 1) Marking BS 5803-3:1985 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standar
35、d. The accuracy of such a claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. R valueThickness requiredAverage bag usage rate Maximum bag coverage rate (not to
36、 be exceeded) As installed After maximum settlement m2K/W mmmm bags/100 m2m2/bag 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5803-3:1985 BSI 08-19993 Appendix A Method for the measurement of the installed t
37、hickness, coverage and density of cellulose fibre insulation A.1 Principle The installed thickness, coverage and density of cellulose fibre insulation supplied in bags and blown through a commercial unit, set to give its normal delivery rate, into a simulated loft area are determined. A.2 Apparatus
38、A.2.1 Simulated loft area, 2 450 mm 2 400 mm 100 mm deep, constructed in accordance with Figure 1. A.2.2 Measuring device, constructed in accordance with Figure 2. A.3 Procedure With the blowing nozzle of the commercial unit held horizontally and approximately 1 m above the simulated loft area, blow
39、 the fibre along the spaces between pairs of joists in turn to an approximate depth of 100 mm. Carefully remove any material resting on the tops of the joists. Position the measuring device at each of 30 locations pre-marked on the joists at the spacing shown in Figure 1. Align the positioning marks
40、 on the device with the inner edges of the joists so that the rule is central in a joist space at the designated location. Take readings by pushing the rule gently downwards until its end contacts the surface of the insulation with the rule vertical. Remove the insulation from between the joists and
41、 weigh it to the nearest 0.1 kg. Take a second set of readings, at the same locations, by pushing the rule gently downwards until its end contacts the floor of the simulated loft area with the rule vertical. A.4 Calculations A.4.1 Installed thickness Calculate the installed thickness a as the arithm
42、etic mean, to the nearest millimetre, of the difference between the pairs of readings taken at each of the 30 locations. A.4.2 Coverage Determine the net ceiling area of the simulated loft by subtracting the area covered by the joists from the total area. Calculate the coverage C (in m2/kg) using th
43、e following equation: where n is the net ceiling area (in m2); m is the mass of insulation (in kg). A.4.3 Installed density Calculate the installed density i (in kg/m3) using the following equation: where a is the installed thickness (in mm); n is the net ceiling area (in m2); m is the mass of insul
44、ation (in kg). Appendix B Method of test for corrosivity B.1 Principle This test is intended to provide a basis for the acceptance or rejection of the level of corrosivity displayed by a fibrous insulation where water may cause chemical constituents to migrate to thin copper or zinc-coated elements
45、adjacent to the insulation. NOTE 1This is an accelerated test and analytical laboratory hygiene is required at all stages. C n m - -= i 1 000m an -= Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5803-3:1985 4 BSI 08-1999 NOTE 2Material
46、passing this test is deemed acceptable when installed adjacent to the thick-sectioned steel components (e.g. nails) which may be present in a loft. Thin-sectional steel components devoid of zinc coating or other protection are at risk in any humid loft environment irrespective of the nature of any i
47、nsulation present. B.2 Reagents and materials B.2.1 Four metal test coupons, two of copper foil of 99.9 % purity and two of zinc foil of 99.9 % purity, each 50 mm 50 mm 0.075 mm thick, judged free of tears, distortions, scratches, perforations, corrosion or other flaws when viewed under and over a 4
48、0 W coiled coil incandescent light bulb. B.2.2 Trichloroethylene, of analytical reagent quality. NOTEAttention is drawn to the possible health risks when using this material. B.2.3 Sulphuric acid, (C) H2SO4= 0.5 mol/L to 1 mol/L. B.2.4 Saturated ammonium acetate solution B.3 Apparatus B.3.1 Humidity
49、 chamber maintained at 40 2 C and 90 % to 95 % r.h. B.3.2 Four cylindrical glass crystallizing dishes, well washed, nominally 90 mm in diameter and 50 mm deep. B.3.3 Rubber or PVC gloves B.3.4 Stainless steel spatula B.3.5 Tweezers Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:17:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5803-3:1985 BSI 08-19995 Figure 1 Plan of simulated loft area for the determination of coverage and installed thickness Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:17
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