2012 Revision of European standard, EN14227, for hydraulically bound mixtures and hydraulically treated soils. John Kennedy is an independent pavement engineering consultant specializing in the use of hydraulic binders and pozzolans to produce environmentally, energy and cost efficient long life pavements. Over the last 20 years, the consultancy has been active in the design, construction and maintenance of road, airfield and industrial pavements in the UK and overseas for a wide range of clients including; the UK Highways Agency, BAA (British Airports Authority), international contractors, D&B and DBFO consortia, trade organizations, material suppliers, consultants and local authorities.