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Welcome to Chris Bennett's and Lis Pedersen's web site. If you are looking for information Chris' current work on affordable housing, please visit www.mygbhousing.info. The video below tells the background to Chris' project.


2003 - TRL - ORN19 Hot Mix Design Guide


2003 - TRL - ORN19 Hot Mix Design Guide

In tropical and sub-tropical countries, the performance of Hot Mix Asphalt (HMA) has often been disappointing, with road surfaces sometimes failing within a few months of construction. Under the high temperature conditions experienced in these countries, bitumen, which is a visco-elastic material, can become very soft. Bitumen can also undergo relatively rapid chemical changes that cause many of the desirable properties of HMA to be degraded or lost altogether. Overseas Road Note 19, which is based on the experience of TRL and collaborating organisations throughout the world, provides a guide to the appropriate design of HMA, and accounts for these deficiencies. This experience has been gained in carrying out a comprehensive, co-ordinated and long-term series of research projects as part of the DFID ‘Knowledge and Research’ programme. The research showed that the behaviour of asphalt surfaces in tropical and sub-tropical environments was frequently contrary to expectations and has given rise to a paradigm shift in our understanding of road behaviour. This new Road Note is aimed at engineers responsible for roads and gives guidance on the design, manufacture and construction of HMA pavement materials in tropical and sub-tropical climates. The HMA requirements are described for different traffic loading categories, including severely loaded sites such as climbing lanes.

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Created Date: 25-06-2019
Last Updated Date: 21-03-2018


Chris in the NCT Race 

Chris has an adventurous spirit which generally involves cycling, running, or just being out there having a good time. Read his 'Race Reports' below. This is a link to his SPOT GPS tracker. If you are interested in his 'geeky' sport technical blog it is at www.tri-duffer.com. He also has stories of his life as 'An Overtravelled Engineer Working for the World Bank' at World Bank Traveller.


Race Reports


Document Library


  • Chris' published papers and reports are here.
  • His Technical Library  has a range of reports 
  • Golden Bay community projects are here.
  • The history of the ROMDAS company is here.
  • The 'Road to Good Health' HIV/AIDs Toolkit is here.


Technical Library

Chris and Lis

Chris and Lis

We are Lis Pedersen and Chris Bennett. We’ve been married over 30 years and each found our way to New Zealand in the early 1980s from Denmark and Canada respectively. Golden Bay has been our happy place for almost 20 years and we are now based in Pohara just above the beach, with our two cats Coco and Max. 




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