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This required minimum isotropic reinforcement (0.3%) in bridge deck slabs, provided certain boundary conditions were satisfied. In the 1990s Mufti et al. [ 40 ] extended this research and showed that significant enhancements in the durability of laterally restrained slabs can be achieved by utilising fibre reinforced deck slabs without steel ...
Detail of construction The process begins by manufacturing thin precast concrete panels, typically 2.25" thick, with the deck's bottom reinforcement included. The panels are then shipped to a jobsite and erected on temporary shoring.
Bamboo reinforcement, including bamboo wrapped in steel wires has been proposed as reinforcement for traditional concrete elements as early as 2005, [26] with recent studies suggesting possible applications in 3D-printed concrete. This technique has the advantage of producing potentially 50 times less carbon emissions than traditional steel ...
Hollow-core slabs, also known as voided slabs, initially appeared as one-way elements in Europe during the 1950s, and are still commonly manufactured in precast form for applications where fast construction and low self-weight are required. [2] [6] Waffle slabs are a common type of hollow-core slab which use the same principle as voided biaxial ...
The underside of a waffle slab, showing the grid like structure. A waffle slab or two-way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. [1] The name waffle comes from the grid pattern created by the reinforcing ribs.
The reinforcement is often steel rebar (mesh, spiral, bars and other forms). Structural fibers of various materials are available. Concrete can also be prestressed (reducing tensile stress ) using internal steel cables (tendons), allowing for beams or slabs with a longer span than is practical with reinforced concrete alone.
3D concrete printing, or simply concrete printing, refers to digital fabrication processes for cementitious materials based on one of several different 3D printing technologies. 3D-printed concrete eliminates the need for formwork, reducing material waste and allowing for greater geometric freedom in complex structures. With recent developments ...
Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground level, negating the ...