1、BRITISH STANDARD BS 3262-3: 1989 Incorporating Amendment No. 1 and implementing No. 2, not published separately Hot-applied thermoplastic road marking materials Part 3: Specification for application of material to road surfaces ICS 93.080.30BS3262-3:1989 This British Standard, having been prepared u
2、nder the directionof the Road EngineeringStandards Policy Committee, was published underthe authority of the BoardofBSI and comes intoeffecton 29 September 1989 BSI 05-1999 First published as BS 3262-1 September 1960 First revision as BS 3262 January1972 Second revision as BS 3262-3 February 1987 Ne
3、w edition September 1989 The following BSI references relate to the work on this standard: Committee reference RDB/25 Draft for comment 87/15710 DC ISBN 0 580 17526 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Road Engineering Stand
4、ards Policy Committee (RDB/-) to Technical ttee Committee RDB/25, upon which the following bodies were represented: British Resin Manufacturers Association Chemical Industries Association County Surveyors Society Department of Transport Department of Transport (Transport and Road Research Laboratory
5、) Glass Manufacturers Federation Institution of Civil Engineers Institution of Highways and Transportation Oil and Colour Chemists Association Road Markings Manufacturers and Contractors Association Society of Chemical Industry Coopted members Amendments issued since publication Amd. No. Date Commen
6、ts 8785 November 1995 10205 November 1998 Indicated by a sideline in the marginBS3262-3:1989 BSI 05-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Definitions 1 3 Preparation of site 1 4 Preparation of material on site 1 5 Laying 1 6 Reflectorization by surfac
7、e application 1 7 Thickness 1 8 Width 2 Text deleted Appendix B Determination of thickness 3 Appendix C Determination of relative density 3 Publications referred to Inside back coverBS3262-3:1989 ii BSI 05-1999 Foreword This British Standard has been prepared under the direction of the Road Engineer
8、ing Standards Policy Committee. It is published in three Parts: Part 1: Specification for constituent materials and mixtures; Part 2: Specification for road performance; Part 3: Specification for application of material to road surfaces. This Part of BS 3262 replaces BS 3262-3:1987 which is withdraw
9、n. There have been many changes in materials and methods of laying since the first issue of this standard in 1960 and the basis of the standard has been changed to include performance requirements. Part 1 specifies the composition and quality control requirements of mixtures. Part 2 specifies the pe
10、rformance requirements for type approval of the materials when applied to the road surface. This Part specifies the requirements for the application of the material to the road surfaces. This edition introduces technical changes to bring the standard up-to-date but it does not reflect a full review
11、of the standard, which will be undertaken in due course. In this new edition, requirements for black thermoplastic material are now included as are extruded road markings which have become widely used. It has been assumed in the drafting of this British Standard that the execution of its provisions
12、is entrusted to appropriately qualified and experienced people. This standard was confirmed in November 1995 on publication of Amendment No. 1. The changes incorporated did not reflect a full review of the standard but were felt necessary to maintain its currency for the forseeable future pending it
13、s withdrawal and supersession by European Standards currently in preparation. Amendment No. 2 published in November 1998 deleted Appendix A. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct applica
14、tion. 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, pages1 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) a
15、nd may have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.BS3262-3:1989 BSI 05-1999 1 1 Scope This Part of BS3262 specifies the requirements for the application of white, yellow and black thermoplastic materials which are melted and applied hot t
16、o road surfaces, using screeded or sprayed methods, as thin superimposed markings for centre lines, edge lines, pedestrian crossing stripes and the like. It does not apply to thermoplastic materials intended to be inset into road surfaces. Provision is made for the application of additional solid gl
17、ass beads for the purposes of reflectorization. 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 BS3262 the definitions given in BS3262-1apply. 3 Preparation of site NOTESince the thermoplastic materia
18、l is applied hot, a good bond to the road is normally obtained on bituminous surfaces. 3.1 Concrete and bituminous surfaces where polished aggregate is exposed On concrete and bituminous surfaces where polished aggregate is exposed, a tack coat shall be used. On new concrete surfaces any laitance an
19、d/or curing compound shall be removed before the markings are applied. 3.2 Condition of surface The material shall not be laid over loose detritus, mud or similar extraneous matter or over old flaking markings of paint or thermoplastic material. If the road surface is at a temperature of less than5C
20、, or if it is wet, it shall be warmed carefully by a road heater so that, when the material is laid, the surface temperature is above5C and the surface dry. 4 Preparation of material on site 4.1 To avoid discoloration and embrittlement due to heating at a temperature in excess of that specified by t
21、he manufacturer, the material shall be broken into pieces, each weighing not more than 4 kg, which shall be melted in a heater fitted with a mechanical stirrer to prevent local overheating. 4.2 A thermometer accurate to within 5 C at the working temperature of the heater shall be used during laying
22、to ensure that overheating of the material does not occur. 4.3 Once molten, hydrocarbon resins shall be used within6h and wood and gum rosins shall be used within4h. The material shall not exceed the manufacturers specified application temperature during that time, and shall be discarded after that
23、time. 5 Laying NOTEThe application of the material to the road can be either by machine or by hand screeding methods. 5.1 After transfer to the laying apparatus the material shall be laid at a temperature within the range specified by the manufacturer for the particular method of laying being used.
24、5.2 The surface of the line, as laid, shall be free from blisters, streaks, lumps and other defects. 6 Reflectorization by surface application Where surface application of solid glass beads is required, the additional solid glass beads shall comply with the class B requirements of BS6088. NOTE 1For
25、products where improved wet night visibility is required, glass beads of size1mm to5mm but otherwise complying with the requirements of BS6088 may be specified and substituted for part, or all, of the total surface-applied glass beads. NOTE 2The initial skid resistance of a road marking may be enhan
26、ced by incorporating a fine graded light-coloured aggregate with the surface applied glass beads. The nominal size of aggregate should be of the same order of size as the glass beads. 7 Thickness The material shall be laid to the following thicknesses. a) For synthetic resin binder: 1) screed lines:
27、 not less than2.0mm nor more than5.0mm; 2) sprayed lines other than yellow: not less than1.5mm; 3) sprayed yellow edge lines (no waiting etc.): not less than0.8mm; 4) extruded lines: not less than2.5mm nor more than3.5mm. b) For gum or wood rosin binder: 1) screed lines: not less than3.0mm nor more
28、than5.0mm; 2) sprayed lines other than yellow: not less than2.0mm; 3) sprayed yellow edge lines (no waiting etc.): not less than2.0mm nor more than3.0mm; 4) extruded lines: not less than4.0mm nor more than5.0mm.BS3262-3:1989 2 BSI 05-1999 The minimum thicknesses specified are exclusive of surface ap
29、plied solid glass beads. The determination of thickness shall be in accordance with Appendix B and Appendix C. 8 Width The tolerance on the specified width of the laid line shall be +10%,5%.BS3262-3:1989 BSI 05-1999 3 Text deleted Appendix B Determination of thickness B.1 General This appendix descr
30、ibes the method for determining the thickness of road marking materials. In cases of dispute the method detailed in B.3.3 shall be used. B.2 Apparatus B.2.1 Micrometer, of the deep frame type with an anvil area of at least10mm and capable of measuring to an accuracy of0.01mm. B.2.2 Metal sheet, of m
31、inimum thickness1.5mm and of minimum dimensions 300mm long and50mm wider than the line being laid. B.2.3 Balance, accurate to 0.1 g. B.3 Procedure B.3.1 General When conducting this determination during normal working, the specimens shall be taken from positions at least3m apart. B.3.2 Initial proce
32、dure B.3.2.1 Prepare three specimens, each not less than300mm long, by allowing the laying apparatus to lay the material on the metal sheet. B.3.2.2 Measure the thickness of the material on a line to which a surface application of solid glass beads has not been applied, by the method described inB.3
33、.3. B.3.3 Measurement procedure B.3.3.1 Weigh the metal sheet to the nearest 0.1g. B.3.3.2 Determine to the nearest0.1g the mass of the specimen and measure the width and length of the specimen to 2mm. B.3.3.3 Calculate the area of the specimen. B.3.3.4 Use the method described in Appendix C to dete
34、rmine the relative density of the material and then calculate the thickness of the line. B.3.4 Measurement procedure (micrometer) Take sufficient readings using the micrometer (at least10on each sheet) to enable the average thickness on the three sheets to be determined. B.4 Expression of results Re
35、port to two decimal places the mean of the three thicknesses determined. Appendix C Determination of relative density C.1 General This appendix describes the method for determining the relative density of thermoplastic road marking materials so that the thickness of a thermoplastic road marking can
36、be determined in accordance with Appendix B. C.2 Apparatus C.2.1 Beakers, tall form, glass,250mL and500mL. C.2.2 Paddle stirrer, electrically driven and controlled to rotate at 150 10r/min. The shaft of the stirrer shall be a6.5 0.5mm diameter steel rod of suitable length to fit the stirrer motor, f
37、itted with a single blade paddle of40 0.5mm length,30 0.5mm depth and 1.5 0.5mm thickness. C.2.3 Analytical balance, accurate to two decimal places. C.2.4 Three silicone rubber moulds, of internal dimensions 301mm 201mm 101mm. C.2.5 Oil bath, capable of maintaining a temperature of 180 5 C. C.2.6 Co
38、tton cord, thin. C.2.7 Water bath, capable of maintaining a temperature of20 0.5C. C.3 Procedure C.3.1 Place a cotton cord in each mould leaving approximately100mm protruding. C.3.2 Weigh approximately200g of thermoplastic road marking material sampled and prepared in accordance with AppendixB of BS
39、3262-1:1989 into a250mL glass beaker. C.3.3 Place this into an oil bath set at180 5 C and lower the stirrer to within15mm of the base of the beaker. C.3.4 Start the motor and regulate the speed of the stirrer to150r/min. Maintain the test conditions for30min,and then remove the beaker and cast three
40、 samples into silicone rubber moulds. C.3.5 Allow the samples to cool to room temperature and then place them and the500mL beaker in the water bath preset at20C. Leave for30min. C.3.6 Weigh each sample to two decimal places. C.3.7 Record the weight as the weight in air. C.3.8 Weigh each sample suspe
41、nded in the beaker of water and record the weight as the weight in water.BS3262-3:1989 4 BSI 05-1999 C.4 Calculation and expression of results C.4.1 Calculate the relative density d using the following equation: where W ais the weight in air (in g); W wis the weight in water (in g). C.4.2 If the res
42、ults differ by more than0.05repeat the test by casting new samples. Report the mean of the three relative densities determined. d Wa Wa Ww - =BS3262-3:1989 BSI 05-1999 Publications referred to BS 3262, Hot-applied thermoplastic road marking materials. BS 3262-1, Specification for constituent materia
43、ls and mixtures. BS 3262-2, Specification for road performance 1) . BS 6088, Specification for solid glass beads for use with road marking compounds and for other industrial uses. 1) Referred to in the foreword only.BS 3262-3: 1989 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitut
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