Civil Engineering Association

PD 6689:2009 Surface treatments. Guidance on the use of BS EN 12271 and BS EN 12273

PD 6689:2009. Surface treatments. Guidance on the use of BS EN 12271 and BS EN 12273

Published Document (PD) 6689 gives guidance on the use of BS EN 12271 and BS EN 12273 in the United Kingdom. BS EN 12271 specifies the properties of surface dressing whilst BS EN 12273 specifies the properties of slurry surfacing and microsurfacing.

PD 6689 gives guidance on the performance requirements and control procedures for the installation of both surface treatments as products for the maintenance of roads and other trafficked areas.

PD 6689 does not apply to the following:
• Surface dressings designed by the purchaser; i.e. the recipe approach for which the contractor is instructed as to the rates of spread, chipping size, etc., and therefore is not responsible for performance requirements
• Surface treatments in tunnels where fire regulations apply
• Small areas under 500 m2 which are not contiguous, such as patch repair
• Airfield pavements covered by international regulations (e.g. International Civil Aviation Organization regulations).

BS EN 12271:2006 Surface dressing. Requirements

BS EN 12271 specifies a range of categories for properties of surface dressing to enable users to select appropriate limiting values for a wide range of uses within Europe.

The specifier needs to define BS EN 12271 categories for properties relevant to the particular end-use of the surface dressing. It does not cover surface dressing works carried out to the purchaser’s design, commonly called a recipe specification.

This type of specification can continue to be used, but purchasers are responsible for the performance of the surface dressing provided that the works have been executed correctly.

BS EN 12273:2008 Slurry surfacing. Requirements

BS EN 12273 specifies a range of categories for properties of slurry surfacing and microsurfacing to enable users to select appropriate limiting values for a wide range of uses within Europe.

Specifiers need to define BS EN 12273 categories for properties relevant to the particular end-use of the slurry surfacing and microsurfacing.

This version of PD 6689 replaces the 2006 version, which is withdrawn.

Contents of PD 6689:
Foreword
0 Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Overview
5 Requirements of BS EN 12271 and BS EN 12273
6 Factory production control
7 Type approval installation trial (TAIT)
Annexes
Annex A (informative) Examples of specification – surface dressing
Annex B (informative) Examples of specification – slurry surfacing and microsurfacing
Bibliography
List of figures
Figure A.1 – Surface dressing – example specifications
Figure B.1 – Slurry surfacing and microsurfacing – example specifications
List of tables
Table 1 – Traditional binder class names
Table 2 – Traffic categories
Table 3 – Surface dressing – tolerance and accuracy of rate of spread of binder and chippings
Table 4 – Surface dressing – categories for defects determined by visual assessment
Table 5 – Surface dressing – recommended minimum macrotexture levels at the end of the guarantee period
Table 6 – Slurry surfacing and microsurfacing – recommended minimum macrotexture levels
Table 7 – Slurry surfacing and microsurfacing – categories for defects determined by visual assessment
Table 8 – Surface dressing – frequencies of test for binder and chipping application
Table 9 – Slurry surfacing and microsurfacing – frequencies of testing – all road types
Table 10 – Surface dressing – example of family of TAITs
Table 11 – Slurry surfacing and microsurfacing – example of family of TAITs