Standards and specs for low carbon materials Alternative Binders to OPC Low carbon, Low energy cements and concretes Eco-cements Co2 activated cements Low energy cement processes Hybrid cements Natural binders Lean carbon concrete strategies Hurdles of development OPC/CSA Geopolymers Alternative raw materials Mineralizers and fluxes Fly ash/slag-based cements Supplementary cementitious materials Alternative binders Standards and codes