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Irish Tar & Bitumen Suppliers
Alexandra Road, Dublin 1, Ireland.
Tel: +353 1 8555117
Fax: +353 1 8554262
Email: info@irishtar.ie
www.irishtar.ie

 
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Rephalt, BBA Approved
 

Rephalt has been certified by the British Board of Agrément (BBA) for use as a cold applied permanent repair material for footpaths, cycle tracks and road maintenence etc.

This is as a result of two year performance trials and tests for Rephalt to determine the Air Voids Content, Resistance to Permanent Deformation and Indirect Stiffness Modulus. These trials and tests complied with the requirements of the Guidelines for the Approval and Certification of Permanent Cold-Lay Surfacing Materials (PCSMs).

Rephalt is widely known as a high performance permanent repair material. The certificate is issued under the Highway Authorities Product Approval Scheme - HAPAS.

 
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Polyflex F - Fuel Resisting Bituminous Binder
 

Polyflex F is a premium polymer modified binder designed to impart increased fuel resistance to hot mix bituminous materials. The use of Polyflex F results in stronger, stiffer and more durable materials which enables their use in areas where fuel spillage is likely. Polyflex F complies with EN1297 Bituminous mixtures - Test methods for hot mix asphalt - Part 43: Fuel Resistance.

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VOC Free 70% Emulsion
 

Irish Tar & Bitumen Suppliers is an innovative and progressive company that provides considerable resources to the development and improvement of its products and services. Irish Tar is committed to limiting the effect of our products on the environment. To this end we have targeted a reduction of VOC's (volatile organic compounds) in our product range.

In July 2009 we ran a successful trial with a VOC free 70% emulsion. This environmentally friendly material is currently been monitored with a view to running more extensive trials in the future with local authorities.

 
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EME 2 Trial
 
EME 2 (Enrobé à Module Élevé) is a base or binder course asphalt mixture which originated in France over 20 years ago. There are three nominal sized mixtures all of which are characterised by continuous gradings with nominal aggregrate sizes of 0/20mm, 0/14mm & 0/10mm.

The mixture is specified in the European Asphalt Specification IS EN 13808-1 and is included in the NSAI Standard Recommendation SR 28. The mixture will be specified in the NRA 900 Series. The material had not been produced or laid in Ireland perviously and the experience gained from layoing a road trial with this material has given confidence to S.M.Morris and Irish Tar that it can be produced, laid and compacted to the specified level of performance.
     
 

A road trial of EME 2 laid in July/August 2009 on the Wicklow Port Access Road and Town Relief Road in cooperation with S.M. Morris Ltd., Morris-Coffey Joint Venture, Wicklow Co. Council, Arup Consulting Engineers, Irish Tar and Bitumen Suppliers.

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Warm Mix Technology in Bituminous Mixes
 
A road trial was carried out to demonstrate the advantages of Warm Mix technology in reducing mixing temperatures in the production of bituminous materials. Advantages of this technology included improved compactability and workability at lower temperatures. The location of the trial was on the N80 National secondary road at Derryclure, Tullamore, Co. Offaly and was carried out in cooperation with The National Roads Authority, Offaly County Council, Kilsaran Road Surfacing and Contract Division, and Irish Tar and Bitumen Suppliers on 6th November 2008.

The trial consisted of two 200m sections of dense binder course made with Warm Mix binder at temperatures 30ºC below standard mixing temperatures.

The trial was successful in demonstrating a number of benefits from the use of Warm Mix additive in binder;
a) the production temperatures were reduced by 30ºC.
b) the properties of the recovered binder from the Warm Mix material had not changed.
c) the workability of the mixed material at lower temperatures was enhanced.
d) there was no exposure to fumes for laying crew.
 
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High Modulus mixes on the N11 Co. Wicklow
 

Road Trial of bituminous materials laid in April 2004 on the N11 in Co. Wicklow in cooperation with SM Morris Ltd., Sisk Consortium, The National Roads Authority, Arup Consulting Engineers, Irish Tar and Bitumen Suppliers.

Improved load spreading properties and increased resistance to deformation can be achieved using harder grades of binder, i.e. 20, 35 or 50 pen grades combined with the asphalt concrete aggregate grading. Work at Irish Tar laboratories and experience of construction practice in France, has shown that these results can be improved upon further, by using denser grading, better compaction technique and specialised binders. The objective of the trial was to monitor the manufacture, laying and performance of a range of high modulus basecourses and roadbases to establish their sustainability in future pavement designs.

The trial was successfully laid; asessments of the performance of each material have been carried out annually since the road trial was commissioned. All the trial materials, including the control section, are performing without any sign of surface irregularity in any section.
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Tack Coat Trial
 
A road trial to evaluate the effectiveness of interlayer tack coating and sealing of bituminous layers was laid on the N11 in Co. Wicklow in July 2004. The trial was carried out in cooperation with SM Morris Ltd., Sisk Consortium, the National Roads Authority, Arup Consulting Engineers, Irish Tar and Bitumen Suppliers.

The trial was designed to measure the amount of structural improvement derived from the formal bonding by tack coating of the bituminous layers in a pavement and consisted of;
a) section with no tack coat.
b) section with standard tack coat.
c) section with polymer modified tack coat.

The trial results established the benefits of bonded pavement layers by Falling Weight deflectograph (FWD) surveys. Deflection values from these surveys have indicated increases in strength of at least 25% in the sections where the bituminous layers were tack coated. Results clearly demonstrated the benefits of applying tack coat to all construction layers and as a result of these trials and subsequent surveys the NRA have specified that tack coats or bond coats are to be applied to all bituminous layers.

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Irish Tar & Bitumen Suppliers // Alexandra Road, Dublin 1, Ireland // Tel: +353 1 8555117 // Fax: +353 1 8554262 // Email: info@irishtar.ie // www.irishtar.ie