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BS EN 1097-8:2020

BS EN 1097-8:2020

$167.15

Tests for mechanical and physical properties of aggregates – Determination of the polished stone value

Published By Publication Date Number of Pages
BSI 2020 38
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This document describes the reference method used for type testing and in case of dispute for determining the polished stone value (PSV) of a coarse aggregate used in road surfacings. For other purposes, in particular factory production control, other methods are possible provided that an appropriate working relationship with the reference method has been established. Examples of advanced test methods can be found in the Bibliography.

Annex A describes an optional method for the determination of the aggregate abrasion value (AAV).

NOTE 1

The AAV method is suitable to use when particular types of skid resistant aggregates, (typically those with a PSV of 60 or greater) which can be susceptible to abrasion under traffic, are required.

The sample is taken from normal run of production from the plant.

NOTE 2

Chippings that have been freshly crushed in the laboratory or recovered from bituminous materials may give misleading results.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms and definitions
9 4 Principle
5 Materials
5.1 General
5.2 Materials
10 6 Apparatus
6.1 General
6.2 Accelerated polishing machine
13 6.3 Friction tester
6.3.1 Calibration
6.3.2 Design
16 6.4 Test sieves
6.5 Grid sieve
6.6 Length gauge or callipers
6.7 Equipment for preparing test specimens
17 7 Preparation of test specimens
18 8 Conditioning of the rubber-tyred wheel
9 Accelerated polishing of specimens
20 10 Friction test procedure
23 11 Calculation and expression of results
24 12 Test report
12.1 Required data
12.2 Optional data
25 Annex A (normative)Determination of aggregate abrasion value (AAV)
A.1 General
A.2 Principle
A.3 Materials
26 A.4 Apparatus
A.4.1 General
27 A.5 Preparation of test specimens
A.5.1 Test portion
A.5.2 Specimens
A.6 Procedure
28 A.7 Calculation and expression of results
A.8 Test report
29 Annex B (normative)Control of materials – Corn emery and emery flour
30 Annex C (normative)Calibration of the accelerated polishing machine
C.1 Control of rubber-tyred wheels
C.2 Accelerated polishing machine
32 C.3 Rate of flow of corn emery and emery flour
33 Annex D (normative)Calibration of the friction tester and sliders
D.1 Friction tester
D.1.1 General
D.1.2 Mass of pendulum arm and pointer
D.1.3 Balancing of the pendulum arm assembly
D.1.4 Setting the effective spring tension
D.1.5 Setting the pointer stop
34 D.2 Control of sliders and slider rubber
35 Annex E (normative)Friction tester reference stone specimen preparation and friction slider conditioning
E.1 General
E.2 Preparation and initial testing of friction tester reference stone specimens
E.3 Slider conditioning
36 Annex F (informative)Precision for the aggregate abrasion value (AAV)
F.1 General
F.2 Precision values for repeatability and reproducibility

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BS EN 1097-8:2020
$167.15