BRE IP1/16 PDF

Introduction

Alkali-activated binder technologies can utilise locally available clays, waste materials and industrial by-products in combination with a manufactured chemical activator; these novel binders are beginning to be regarded as one of several viable alternatives to PC in construction applications that currently utilise this conventional type of cement. These binders have the potential to play an important role in reducing the environmental impacts associated with global cement and concrete production[1, 2], which are considerable*. In many cases, AA binder technologies can also offer superior mechanical properties when subjected to high temperatures[3, 4], corrosive aqueous liquids[5, 6] or other aggressive environments[7], subject to satisfactory demonstration of durability. Concerns about the continued long-term security, acceptability and availability of PC in view of global CO2 emissions targets, policies and industrial practices have been expressed by some concrete product manufacturers[8]. These concerns and customer demands for more sustainable products provide a further incentive towards these manufacturers adopting alternative binders.

This BRE Information Paper sets out, from a UK perspective, the types of supply chains (existing and potential) that are relevant to AA binders and describes business models for their introduction. It also provides an overview of the potential of these binders to contribute to the development of concrete and concrete products with reduced environmental impact