1、BRITISH STANDARD BS 6319-9: 1987 Testing of resin compositions for use in construction Part 9: Method for measurement and classification of peak exotherm temperature UDC 691.342 + 691.537:54.08:536.66BS6319-9:1987 This British Standard, having been prepared under the directionof the Civil Engineerin
2、gand Building Structures Standards Committee,was published underthe authority of the BoardofBSI and comes into effect on 31March1987 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference CSB/20 Draft for comment 85/13280 DC ISBN 0 580 15775 X Committees re
3、sponsible for this British Standard The preparation of this British Standard was entrusted by the Civil Engineering and Building Structures Standards Committee (CSB/-) to Technical Committee CSB/20, upon which the following bodies were represented: British Adhesives and Sealants Association British
4、Plastics Federation Concrete Society Construction Industry Research and Information Association County Surveyors Society Department of the Environment (Building Research Establishment) Department of Transport (Highways) Federation of Epoxy Resin Formulators and Applicators Ltd. Institution of Civil
5、Engineers Institution of Highways and Transportation Institution of Structural Engineers Plastics and Rubber Institute Society of Chemical Industry Amendments issued since publication Amd. No. Date of issue CommentsBS6319-9:1987 BSI 09-1999 i Contents Page Committees responsible Inside front cover F
6、oreword ii 1 Scope 1 2 Principle 1 3 Apparatus 1 4 Test specimens 1 5 Procedure 1 6 Test report 1 Appendix A Classification 2 Figure 1 Typical beaker for exotherm measurements 2 Table 1 Classification 2 Publications referred to Inside back coverBS6319-9:1987 ii BSI 09-1999 Foreword This Part of BS63
7、19 has been prepared under the direction of the Civil Engineering and Building Structures Standards Committee. It describes a method for the measurement and classification of the peak exotherm temperature reached during the curing of a sample of a resin composition under standardized, not adiabatic
8、conditions. The precision of this test method has not been considered in detail. Experience indicates that there is appropriate reproducibility in the test method for the classification. The significance and interpretation of peak exotherm temperature are described inAppendix A. This Part of BS6319
9、should be read in conjunction with Part1 which provides general information and describes a method for preparing test specimens. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compli
10、ance with a British Standard does not of itself confer immunity from legal obligations. In particular, attention is drawn to the Health and Safety at Work etc. Act1974. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and 2, an inside back cover a
11、nd 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.BS6319-9:1987 BSI 09-1999 1 1 Scope This Part of BS6319 describes a method of measurement for the peak exotherm tempe
12、rature for resin based materials for use in the construction industry. A general guide-line for the classification of systems as “high, medium or low” exotherm is given inAppendix A. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Principle The
13、principle of this method is the determination of the temperature that a resin composition reaches after mixing the component parts together. The maximum temperature reached under standardized but not adiabatic laboratory conditions is recorded and reported as the peak exotherm temperature. 3 Apparat
14、us 3.1 Temperature measuring devices with a resolution of1 C and calibrated in accordance with BS4937. NOTETwo temperature recorders or indicators utilizing thermocouples are most convenient for this method. They should be accurate to within 1% of the scale. 3.2 Two plastics beakers each of600mL nom
15、inal capacity with a wall and base thickness of2.5 0.75mm, made from suitable plastics such as polypropylene, polyethylene or polymethylpentene (PMP) depending on the anticipated temperature. Typical dimensions are indicated inFigure 1. NOTE600 mL beakers with dimensions varying from those given inF
16、igure 1 may be used, provided that the ratio of the internal diameters at the top and bottom of the beaker is not greater than1 : 2, the bottom diameter is between78mm and95mm inclusive. 3.3 Expanded polystyrene slab of minimum thickness25mm. 4 Test specimens The preparation of test specimens, inclu
17、ding the conditioning, proportioning and mixing of materials, shall be in accordance with BS6319-1. Calculate quantities of components, as applicable, to give a mixed volume of at least500mL. Place the mixed material in the tared beakers (3.2) to give two different thicknesses after placing and comp
18、action (if appropriate) of: a) 201mm in one beaker; and b) 501mm in the other beaker. Weigh the filled beakers to the nearest1g and determine and record the mass of the test specimens. Carry out no further mixing or stirring in the test beakers. Place the beakers on the polystyrene slab(3.3) in a dr
19、aught-free room or laboratory maintained at the test temperature. 5 Procedure Carry out the test at an air temperature of20 1 C unless for a specific purpose an alternative temperature is deemed more appropriate. Maintain whatever test temperature is chosen, at 1 C throughout the test. For each beak
20、er (3.2), take the temperature by inserting the thermocouple end of the temperature measuring device (3.1) into the centre of the mixed material. Position the end of the temperature recording device within5mm of the radial centre of the beaker and immersed to half the depth of the layer1mm. Record t
21、he temperature autographically or by observation with careful monitoring such that the maximum temperature reached shall be identified to the nearest1 C. Continue the test until a drop in temperature clearly indicates that the maximum temperature has been passed. 5.6 Classification Classify the comp
22、osition as “low”, “medium” or “high” exotherm, at the temperature tested, as described inAppendix A. 6 Test report The following information shall be included in the test report: a) date of test; b) complete identification of the material tested including type, source, manufacturers codes, numbers,
23、history, etc.; c) ambient conditions during the preparation and testing of specimens; d) the mass of each test portion; e) the maximum temperature recorded to the nearest1 C for each test portion during the test, i.e. the peak exotherm temperatures; f) classification of the resin composition in acco
24、rdance withAppendix A.BS6319-9:1987 2 BSI 09-1999 Appendix A Classification The peak exotherm temperature is a function of the reactivity of a resin composition and the practical significance of this property is that high exotherm systems may be unacceptable if the material is to be used to fill a l
25、arge void, possibly due to stresses arising when the composition cools from a relatively high temperature. Reactive, high exotherm systems may, however, be quite acceptable when used in small bulk quantities and indeed, may be necessary for some specific low ambient temperature cure situations. The
26、peak exotherm temperature is, therefore, of practical use in obtaining a relative assessment of the heat that might be generated when using the material on site. A classification based on this method to quantify this relative assessment in general terms (high, medium, low) is given inTable 1. It sho
27、uld not be assumed that the temperature reached during this test will be reached on site and, in general, temperatures generated on site will be lower due to heat-sink effects. Table 1 Classification Classification Peak exotherm temperature Low Less than10 C above ambient for a20mm specimen and less
28、 than20 C above ambient for a50mm specimen Medium Less than15 C above ambient for a20mm specimen and less than30 C above ambient for a50mm specimen High More than15 C above ambient for a20mm specimen or more than30 C above ambient for a50mm specimen Figure 1 Typical beaker for exotherm measurementsB
29、S6319-9:1987 BSI 09-1999 Publications referred to BS 4937, International thermocouple reference tables. BS 6319, Testing of resin compositions for use in construction. BS 6319-1, Method for preparation of test specimens. BS 6319-9: 1987 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsIns
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