| 摘要 |
A simplified box-like building is constructed one room at a time. Concrete slabs are used for walls, floor and ceiling, and are poured in a horizontal position, stacked vertically with bond-breaking layers between them to allow separation. After the foundation and stub wall are partially cured, the ceiling slab is poured with wedge-shaped edges clearing stub walls by approximately one inch. Tiltable wall slabs are then poured on top of the ceiling slab, each connected by hinges to its own stub wall. An accelerated light weight low-slump concrete is normally used, and makes possible a rapid nearly continuous pouring sequence. Erection of the building is also rapid. The light weight walls are tilted up by hand, pivoting about their base hinges. While they are temporarily held in position, the wall edge dowel reinforcement is bent out and single-side corner forms are positioned or expanded metal is attached to the dowels. The corner joint is sprayed with accelerated low-slump concrete to form a unit, and hollowed areas at the bases of walls are sprayed to form shear connections to the stub walls at the dowels. Removable light weight beams supporting winches are placed across the upper corners, and the ceiling slab is manually raised by winching into place. Dowel reinforcement bars are bent out and accelerated concrete joins the wall tops to the ceiling slab edges to complete the unit. The process is repeated for multi-story buildings and for multiple rooms on each floor. Due to the nature of the accelerated concrete, the process can be done nearly continuously by unskilled labor using only one piece of powered equipment which is the concrete mixer-pump-sprayer machine.
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