NOTICE OF DISCLAIMER:
No liability is accepted for errors or inaccuracies in any of information contained on this website. All views or opinions expressed are personal to the author who does not purport to speak for, or represent, any professional body or organisation. Reliance should not be placed on any material contained in this webpage without first seeking and obtaining further professional advice.
March 2017
Is High PSV Asphalt a Safe Alternative to High Friction Surfacing?
Introduction
In recent years, the use of HFS has reduced considerably in UK & Ireland. There is a view in some quarters that conventional surfacing materials with a high PSV aggregate can offer a better whole life cost option to deliver a high level of skid resistance. Is there merit to this viewpoint and does High PSV Asphalt offer a safe alternative to HFS? ---- More
13th January 2017
Why High Friction Surfacing with Calcined Bauxite Provides The Best
Safety Surface for Skid Resistance
High Friction Surfacing – Definition & Applications
High Friction Surfacing (HFS), commonly termed Anti-skid, refers to a surface treatment approximately 3-5mm thick which provides enhanced surface skid resistance for drivers to brake under emergency conditions at hazardous locations. HFS is defined by Industry as having a minimum skid resistance value (SRV) of 65 measured using the portable Skid-Resistance Pendulum Tester as defined in TRL Report 176, Appendix E. The aggregate used is Calcined Bauxite (normally buff or grey), which is usually imported from either China or India. Typical locations for HFS installation include approaches to roundabouts, pedestrian crossings, junctions, sites with steep gradients and dangerous bends --- more
12th July 2016
Transport Infrastructure Ireland’s new high-friction surfacing specification
The March 2015 revision of Transport Infrastructure Ireland (TII, formerly the National Roads Authority) ‘Specification for Roadworks Series 900’ is completely new for high-friction surfacing (HFS), commonly termed ‘anti-skid’.
This new ‘performance’ specification within document CC-SPW-00900-07 supersedes the old Clause 924, and allows more opportunity of choice for highway engineers. This is a very constructive development by TII for due commendation. However, it has also generated hidden caveats, disparity and ambiguities which are examined in this article which was published in Engineers Journal ... more
28th June 2016
Benefits & Specification of High Friction Surfacing
High-friction surfacing (HFS), commonly termed ‘anti-skid’, refers to a surface treatment approximately 3-5mm thick that provides enhanced surface skid-resistance for drivers to brake under emergency conditions at hazardous locations.
HFS is defined by industry as having a minimum skid-resistance value (SRV) of 65, measured using the portable skid-resistance pendulum tester (as defined in TRL Report 176, Appendix E). Typical locations for HFS installation include approaches to roundabouts, pedestrian crossings, junctions, sites with steep gradients and dangerous bends ... read on
16th June 2014
Public Works Contracts For Minor Works – Some Key Points to Watch
These are some of the points I believe that Contractors should be aware of when tendering or starting a contract. Much of this key information is contained within the Contract Schedules www.johncagney.ie/Blog160414.html
8th April 14
High Friction (Anti-skid) Surfacing & Coloured Cycle Lanes
High Friction (HFS) or Anti-skid Surfacing is a proven road surface treatment that increases skid resistance and reduces braking distance, thereby reducing the potential for accidents. It has a long history of proven use having first been used in the UK in the late 60’s. HFS incorporates a 1mm to 3mm 70+ PSV Calcined Bauxite aggregate. Calcined bauxite is an extremely durable & hard aggregate www.johnagney.ie/Blog080414.html
14th March 14
Public Works Contracts For Minor Works – A Personal Perspective
The Public Works Contract for Minor Works is recommended for Employer designed contracts with a value between €500k to €5 million. Having worked on a number of road projects using this form, there would seem to be some key differences developing in the relationship between the Contractor and the Engineer / ER. These in my view are due to onerous notification and time constraints in the new forms www.johncagney.ie/Blog140314.html