How can we build with a high level of efficiency and at the same time conserve resources? The challenges are many: it is a question of global competitiveness, efficiency and sustainability. These and other questions will be discussed on 11 and 12 November 2015 within the framework of the IAB Science Days. Once again, the 22nd IFF Conference and the 20th Pipeline Construction Congress will present innovations around the themes of materials, simulation, procedures and equipment, concrete products and precast as well as gas, water, wastewater, local and district heating.