10.05 paper 1: keynote: 'gcca's 2050 climate ambition: concretes role in carbon reduction,' andrew minson, gcca 10.30: qamp;a. 10.40 paper 2: 'development of a robust 3d concrete printing system: from ramp;d to successful projects' bruno lobo, saintgobain weber beamix b.v. 11.05 qamp;a.