LIGHTWEIGHT BURIED MATERIAL AND PRECAST CONCRETE SLAB USING IT AND VOID SLAB

摘要

PROBLEM TO BE SOLVED: To provide a lightweight buried material increasing the void ratio of a void slab while improving the degree of fixation and ease of the installation of the buried material and a precast concrete slab using the buried material and the void slab. SOLUTION: In the lightweight buried material 1, projections 2 are formed at places positioned at the crossing sections of lattices in a top face, through-holes 4 having a small diameter are formed towards the lower sides in lattice sections 3 connecting the projections 2 and ribs 5 are projected from the peripheries of the lower openings of the through-holes 4. The projections 2 are formed in a hemispherical shape. The lattice sections 3 comprise an inclination to the lower sides towards the through-hole 4 sides from the projections 2. COPYRIGHT: (C)2004,JPO