HOLLOW SLAB AND CYLINDRICAL PIPE USED THEREFOR

摘要

PROBLEM TO BE SOLVED: To prevent infiltration of water into a cylindrical pipe arranged in a hollow slab. SOLUTION: This both-end-closed cylindrical pipe 14 is used for the hollow slab made of cast-in-place concrete. The inner peripheral surface is covered with a covering material 22 composed of foaming plastic of independent foam, leaving a space 18 extending between both ends. COPYRIGHT: (C)2005,JPO&NCIPI