INNOVATIVE CONSTRUCTION TECHNOLOGIES FOR SUSTAINABLE DEVELOPMENT

This paper presents some recent innovations on the design and construction of precast reinforced concrete structures including the multi-spiral shear reinforcement, automatic precast concrete production technology, and application of precast waffle slab system for high-tech factories. The innovative multi-spiral shear reinforcement provides both technical and cost advantages over the conventional column stirrups. It can greatly enhances concrete confinement, improves ductility and seismic resistance, reduces the labor costs by more than 45%, reduces the amount of steel shear reinforcement by 30 to 50%, reduces the carbon imprint, shortens the construction time by 50% and is highly cost-effective for precast construction. The development of automatic precast concrete production technology provides good quality and efficiency for construction of concrete structures. Only five days are needed for a typical building story by using the automatic precast concrete production technology. The precast waffle slab system can be installed with very high precision (1.5 cm in 400 m) and reduce construction time by up to 50%. The precast waffle slabs can also be used as the formwork to support the construction loadings. The construction time and accidents can be significantly reduced.