Waffle Slab with Eccentric Opening Externally Strengthened by Basalt Textile Reinforced Mortar

Abstract

This study investigates the behaviour of two-way waffle slabs that contain an eccentric opening. These slabs were externally strengthened by the basalt textile reinforced mortar (BTRM) technique under simply supported boundary conditions. The dimensions of the samples were (1050 ×1050 mm), and the precise topping thickness was (50 mm), while the joist dimension was (100 × 50 mm). Steel reinforcement was mesh at the top (ϕ6 mm @ 75 mm c/c), and the bottom of the joists contained (1 ϕ8 mm).

The strengthening process was carried out on the ribs that were cut by square and circular opening, and the result revealed that warping the catted ribs by the basalt textile reinforced mortar technique enhanced flexural strength and significantly increased ductility.