1、BRITISH STANDARD BS 598-112:2004 Sampling and examination of bituminous mixtures for roads and other paved areas Part 112: Method for the use of road surface hardness probe ICS 93.080.20 BS 598-112:2004 This British Standard was published under the authority of the Standards Policy and Strategy Comm
2、ittee on 25 June 2004 BSI 25 June 2004 The following BSI references relate to the work on this British Standard: Committee reference B/510/2 Draft for comment 00/105086 DC ISBN 0 580 43922 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Te
3、chnical Committee B/510, Road materials, to Subcommittee B/510/2, Surface dressings, sprays and slurry surfacing, upon which the following bodies were represented: Bitumen Modifiers Association British Civil Engineering Test Equipment Manufacturers Association Coldmac Ltd. County Surveyors Society D
4、ETR Highways Agency Energy Institute Institution of Civil Engineers Institution of Highways and Transportation Quarry Products Association Refined Bitumen Association Road Emulsion Association Ltd. Road Surface Dressing Association Society of Chemical Industry Slurry Seal Contractors Association TRL
5、 Transport Research Laboratory Co-opted members Amendments issued since publication Amd. No. Date CommentsBS 598-112:2004 BSI 25 June 2004 i Contents Page Committees responsible Inside front cover Foreword ii 1S c o p e 1 2 Normative references 1 3T e r m s a n d d e f i n i t i o n s 1 4 Principle
6、1 5A p p a r a t u s 1 6 Calibration 1 7 Procedure 3 8C a l c u l a t i o n s 4 9 Test report 4 Bibliography 5 Figure 1 Probe 2BS 598-112:2004 ii BSI 25 June 2004 Foreword This part of BS 598 has been prepared by Subcommittee B/510/2, Surface dressings, sprays and slurry surfacing. It determines the
7、 penetration of a standard probe at a known temperature into a road surface. This data may be used when carrying out surface dressing design in accordance with Road Note 39, Design Guide for Road Surface Dressing 1. It has been assumed in the drafting of this British Standard that the execution of i
8、ts provisions is entrusted to appropriately qualified and experienced people. 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 o
9、bligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 5 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.BS 598-112:2004 BSI 25 June 2004 1 1 Scope This British Standard d
10、escribes a method to determine the penetration of a standard probe into the road surface and the temperature at which this is carried out, usually prior to the application of surface dressing as part of the design process. NOTE This data is required for the determination of road surface hardness as
11、part of the Road Note 39, Design for Road Surface Dressing 1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the reference cited applies. For undated references, the latest edition of the referenced documen
12、t (including any amendments) applies. BS 598-100, Sampling and examination of bituminous mixtures for roads and other paved areas Part 100: Methods for sampling for analysis. BS 598-102, Sampling and examination of bituminous mixtures for roads and other paved areas Part 102: Analytical test methods
13、. 3 Terms and definitions For the purposes of this British Standard, the terms and definitions given in BS 598-100 apply. 4 Principle A hemispherically-ended steel rod is forced into the surface under a constant load for a constant time and the depth of penetration is measured. The road surface temp
14、erature is recorded. 5 Apparatus 5.1 Probe, capable of applying a force of (340 10) N to a probe of hardened steel (4.0 0.1) mm in diameter and machined to a rounded shaped tip (approximately hemispherical) (see Figure 1). The probe shall be clean. 5.2 Electronic thermometer, accurate to 1 C, for me
15、asuring the road surface temperature; the measuring element shall be an unsheathed thermocouple. 5.3 Means of linear measurement, either a ruler graduated in millimetres or a dial gauge modified with a sleeve fitted around the plunger. 5.4 Timer, a clock with a sweep hand accurate to 1 s in 5 min. 6
16、 Calibration The probe shall be calibrated at least annually and dependent upon use. Other equipment shall be calibrated at the frequency stated in BS 598-102.BS 598-112:2004 2 BSI 25 June 2004 Figure 1 Probe Suitable connection to loading device Push fit collar, 5 - 10 mm thick and 15 - 25 mm 4.0 0
17、.1 Rounded tip (approximately hemispherical) BS 598-112:2004 BSI 25 June 2004 3 7 Procedure 7.1 Measurement of in situ penetration 7.1.1 General In situ measurement shall be made only when the surface temperature is between 15 C and 35 C. NOTE If the temperature is outside these limits then the meas
18、urements may be deferred until the road surface temperature complies with the limits or cores may be taken and the test carried out in the laboratory. 7.1.2 Temperature measurement Measure the road surface temperature with the thermometer for each set of 10 probe measurements to 1 C. To allow for th
19、e thermal capacity of the thermometer tip, hold it in one position until the temperature stabilizes and then move it to an adjacent position and the temperature is recorded. One measurement is sufficient for each set of 10 penetration readings. NOTE 1 A piece of expanded polystyrene has been found t
20、o be suitable to hold the probe tip in close proximity to the surface. NOTE 2 If the temperature moves more than 2 C between the first and second position of the probe tip, continue moving until the change is 2 C or less. Record the final temperature only. 7.1.3 Selection of measurement points for t
21、esting NOTE Measurement points are normally in the near-side wheel-track of the traffic lane at the locations required. 7.1.3.1 Mark 10 measurement points at each location where the road hardness is to be determined. These shall be spaced evenly along the road at intervals of approximately 0.5 m. 7.
22、1.3.2 Select the measurement points from a road surface that is visually similar throughout. Position the points such that the probe tip will not be centred on existing large stones present in the road surface. NOTE Ignore any recently repaired or patched areas of the road pavement, unless these loc
23、ations have to be measured separately. 7.1.4 In situ measurement of road hardness 7.1.4.1 Slide the collar, fitted to the probe to indicate depth of penetration, down the shank until it is flush with the end of the probe. 7.1.4.2 Centre the probe on the first point and maintain the constant calibrat
24、ed force for a period of (10 1) s, keeping the probe as still as possible in an approximately vertical position. 7.1.4.3 Measure the penetration of the probe to the nearest whole millimetre either with the ruler or by slipping the protruding probe tip into the sleeve of the modified dial gauge until
25、 the collar butts up against the sleeve. 7.1.4.4 If the point selected for test is below the surface of the remainder of the road pavement on which the probe collar rests, deduct the measurement of initial projection of the probe from the final figure. NOTE On worn surfaces, normally under considera
26、tion for surface dressing, this deduction is often not required. 7.1.4.5 Repeat 7.1.4.1 to 7.1.4.4 in order to determine the penetration of the probe for the remaining measurement points. 7.1.4.6 The 10 measurements shall be carried out within a 15 min interval. NOTE This is to ensure that the same
27、temperature measurement applies to all penetration measurements. 7.2 Measurement of penetration from cores 7.2.1 Take one core of 100 mm minimum diameter from the road at each of the measurement points. Transport the cores top-face downwards on a flat surface. Test the core on the top surface as soo
28、n as possible after delivery to the laboratory and, in any case, the test shall be completed within 72 h of taking the cores. 7.2.2 Do not allow the samples to be subjected to anything that could modify their response (such as wheel-tracking or high temperatures) prior to the probe measurements bein
29、g taken.BS 598-112:2004 4 BSI 25 June 2004 7.2.3 Fit a collar around the core and fill any gap between the collar and core with plaster of Paris. Maintain the core with its collar at a temperature of (30 1) C for not less than 4 h nor more than 16 h prior to testing and test within 5 min of removal
30、from the oven. 7.2.4 Determine the probe penetration of each core in accordance with 7.2.1, 7.2.2 and 7.2.3. NOTE As the cores have been brought to a standard temperature, it is not necessary to measure the temperature. 8 Calculations Calculate the mean of each set of 10 probe measurements and repor
31、t as the mean probe penetration at the measured road surface temperature. 9 Test report 9.1 Required information The test report shall include the following information for each test specimen: a) the date, time and place of test; b) the road number, location and lane; c) whether the testing was carr
32、ied out in situ or on cores in a laboratory; d) the temperature at which the test was carried out; e) the probe penetration at each measurement point and the mean probe penetration; f) the name of the person taking technical responsibility for the test; g) the number and date of this British Standar
33、d, i.e. BS 598-112; h) any test conditions and operational details not provided in this British Standard, and anomalies, if any, likely to have affected the results. NOTE The location information should include sufficient data to: a) relocate the test position on site; and b) locate the position on
34、a 1:50 000 OS map, e.g. map number and six figure grid reference. 9.2 Optional information The test report may include the following optional information: a) the name of the project; b) the shading of the site.BS 598-112:2004 BSI 25 June 2004 5 Bibliography 1 TRL Road Note 39. 5th ed. Design Guide f
35、or Road Surface Dressing. London: TRL, Crowthorne, Berkshire, 2002.BS 598-112:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the in
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