Concrete is a global material that underwrites commercial wellbeing and social development. There is no substitute that can be used on the same engineering scale and its sustainability, expolitation and further development are imperatives to creating and maintaing a healthy economy and environment worldwide. The pressure for change and improvement of performance is relentless and necessary. Concrete must keep evolving to satisfy the increasing demands of all its users. These six volumes are the proceedings of the international Challenges of Concrete Construction Congress held in September 2002 with contributions from many of the world's leading authorities in this field.