BS 598-108:2005:2006 Edition
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Sampling and examination of bituminous mixtures for roads and other paved areas – Methods for determination of the condition of the binder on coated chippings and for measurement of the rate of spread of coated chippings
| Published By | Publication Date | Number of Pages |
| BSI | 2006 | 10 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD BS 598-108: 2005 Sampling and examination of bituminous mixtures for roads and other paved areas – Part 108: Methods for determination of the condition of the binder on coated chippings and for measurement of the rate of spread of coated chippings |
| 2 | Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee B/510, Road materials, to Subcommittee B/510/1, Coated macadam and hot asphalt, upon which the following bodies were represented: British Civil Engineering Manufacturers’ Association County Surveyors’ Society Department for Transport – Highways Agency Institute of Asphalt Technology Institution of Civil Engineers Institution of Highways and Transportation Mastic Asphalt Council Ltd. MoD – UK Defence Standardization Quarry Products Association Refined Bitumen Association Scottish Office – Roads Directorate Society of Chemical Industry TRL – Transport Research Laboratory United Kingdom Accreditation Service Co-opted members |
| 3 | Contents |
| 4 | Foreword This part of BS 598 has been prepared by Technical Committee B/510/1. It supersedes BS 598-108:1990, which is withdrawn. This new edition of BS 598-108 incorporates technical changes only. It does not reflect a full review or revision of the standard, which will be undertaken in due course. This edition introduces a number of changes associated with the introduction of the European standards for aggregates and the as… Due to the different factors to be considered when sampling and testing mastics for roads and other paved areas it has been decided to continue publishing the requirements for mastics as a separate British Standard, i.e. BS 5284. It has been assumed in the drafting of this part of BS 598 that the execution of its provisions is entrusted to appropriately qualified and experienced people. It is recognized that safety during sampling is of great importance. It should be noted that the work of sampling may be subject… This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its 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, pages 1 to 4, an inside back cover and a back cover. The copyright notice displayed in this document indicates when the document was last issued. |
| 5 | 1 Scope This part of BS 598 describes a hot sand test method for determining the condition of the binder on coated chippings and a method for measuring the rate of spread of coated chippings. 2 Definitions For the purposes of this part of BS 598 the definitions given in BS 6100 apply. 3 Hot sand test for the condition of the binder on coated chippings 3.1 Principle This test is used to ensure that coated chippings to be applied to the surface of surface course rolled asphalt have not been ov… 3.2 Materials 3.2.1 Sand Clean dry silica sand with a rounded particle shape and in accordance with the grading given in Table 1. 3.2.2 Grit Clean dry silica grit with a rounded particle shape and in accordance with the grading given in Table 1. Table 1 – Grading of sand and grit 3.3 Apparatus 3.3.1 Oven, thermostatically controlled at 125 ˚C. 3.3.2 Two metal trays, minimum size 400 mm ° 350 mm ° 60 mm deep; a greater number of smaller trays may be used to provide the appropriate area. 3.3.3 Thermometer, to indicate 100 ˚C to 130 ˚C, accurate to ±1 ˚C. 3.3.4 Sieves, of 10 mm, 6.3 mm and 4 mm aperture, with a 300 mm diameter, conforming to BS 410. 3.3.5 Tins, of 5.0 ± 0.5 l capacity, each with a tight fitting lid. |
| 6 | 3.4 Procedure Proceed as follows. a) Fill the trays (3.3.2) to a level depth of about 25 mm with the 300 µm to 150 µm clean sand and place in the oven (3.3.1) at 125 ˚C to 130 ˚C with the thermometer (3.3.3) immersed in the sand. b) Sieve the chippings for 30 s using the 10 mm test sieve (3.3.4) for 14/20 mm size chippings or the 6.3 mm test sieve (3.3.4) for 8/14 mm size chippings. Reject those chippings which pass through the sieve. c) Ensure that the sieved chippings are dry and if necessary dry by heating in the oven (3.3.1) at about 60 ˚C. Weigh the sieved specimen to the nearest gram (W1). d) Remove one tray from the oven when the sand temperature has reached 125 ˚C to 130 ˚C and spread chippings from the sample ont… e) Cover the chippings by pouring hot sand from the second tray. Level the sand quickly and replace the tray with chippings in the oven for a minimum of 10 min. Ensure that the final sand temperature is not less than 100 ˚C. f) Remove the tray with chippings from the oven, pour the sand and the chippings on the 4 mm test sieve, and allow the chippings on the sieve to cool for approximately 10 min. g) Place the cool chippings in the 5.0 l tin (3.3.5) half filled with 1.18 mm to 600 µm silica sand. Shake the tin longitudinally a total of 100 cycles in about 60 s with a displacement of about 100 mm. h) Resieve the chippings using the 4 mm test sieve and wash with a strong jet of cold water, drain the chippings, tip onto paper and allow to dry thoroughly. i) Weigh the sample of chippings (W2) and determine the sand retained on the chippings calculated from (W2 – W1) 1 000/W1 (g/kg). j) Examine the chippings individually in a good light and reject those having less than half sand-cover and weigh the rejected chippings. k) Weigh the total chippings to the nearest gram. 3.5 Reporting Report the quality of the chippings as the mass of sand retained per kilogram to the nearest gram and the percentage by mass of chippings rejected to the nearest 0.1 %. 4 Measurement of the rate of spread of coated chippings 4.1 Principle Three methods are described. In the first, the quantity of chippings for a shoulder-to-shoulder cover for an area is derived. Th… |
| 7 | 4.2 Method for establishing the rate of spread of chippings to give shoulder-to-shoulder cover Proceed as follows. a) Riffle a representative sample of the chippings, taken in accordance with BS EN 932-1 to provide a sub-sample of about 1 kg for 14/20 mm size chippings or about 750 g for 8/14 mm size chippings. b) Individually place the chippings from the sub-sample in a tray of known area, not smaller than 600 mm ° 600 mm with vertical … c) Take further sub-samples and add the chippings to the tray until the area is completely covered. d) Determine the mass of these chippings to an accuracy of ±5 g and repeat the test three times. e) Take the mean of the four results, divide it by the area of the tray, and obtain the rate of spread of chippings per square metre for shoulder-to-shoulder cover. 4.3 Measurement of the rate of spread of chippings for mechanical chipping spreaders 4.3.1 Apparatus. The apparatus shall consist of shallow aluminium trays 300 mm square, secured by four short lengths of chain to… 4.3.2 Calibration. Proceed as follows. a) Check the calibration of the spring balance on each day of use or more frequently if error is suspected. b) Carry this out by placing masses of chippings on the tray equivalent to the masses of chippings giving a low and high rate of spread, e.g. 7.5 kg/m2 and 15 kg/m2, and check that the calibration of the spring balance is correct at these two rates. 4.3.3 Procedure. Proceed as follows. a) Lay five metal trays, in echelon, in front of each half width of the chipping spreader and when the machine has passed over them, hook each tray with its quota of chippings on to and lift by the spring balance and note the rate of spread. b) Immediately return the chippings on the tray to the vacant area on the road before the roller traverses that area. c) Repeat this to give 10 readings for each half width of chipping spreader and report the mean of these 10 readings as the rate of spread for each half width. d) Repeat the measurements of the rate of spread: 1) for each new batch of chippings; 2) if visual observation indicates a change in the rate of spread; 3) if the machine is changed; or 4) at the discretion of the purchaser or his representative. 4.3.4 Reporting of results. Report the rate of spread of chippings as the average of each group of 10 results. 4.4 Measurement of rate of spread of chippings spread by hand Determine the rate of spread of chippings from the mass of chippings used and the area of road covered by these chippings. |
| 8 | Publications referred to Standards publications BS 410, Specification for test sieves. BS 5284:1993, Methods of sampling and testing mastic asphalt used in building and civil engineering. BS 6100, Glossary of building and civil engineering terms. BS EN 932-1, Tests for general properties of aggregates – Part 1: Methods for sampling. BS EN 13043:2002, Aggregates for bituminous mixtures and surface treatments for roads, airfields and other trafficked areas. PD 6682-2:2003, Aggregates – Aggregates for bituminous mixtures and surface treatments for roads, airfields and other trafficked areas – Guidance on the use of BS EN 13043. PD 6682-9:2003, Aggregates – Guidance on the use of European test method standards. Other documents [1] GREAT BRITAIN. Health and Safety at Work etc. Act 1974. London: The Stationery Office. [2] GREAT BRITAIN. The Factories Act 1961. London: The Stationery Office. [3] GREAT BRITAIN. The Construction Regulations 1961. London: The Stationery Office. |
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