Abstract
The slabs of some buildings in Barcelona are formed by unidirectional beams, with a ceramic arch in between, which are filled with broken pottery or construction waste. These structures often present problems such as displacement of the tiles arranged over it due to the lack of stiffness of the filling material. This supposes a risk to the user and could also cause durability problems. In order to rehabilitate it, a lightweight self-compacting concrete reinforced with fibres (HLACF) has been designed to be used as a filling material, improving the stiffness of the structure. This paper presents a structural analysis of a standard case and the results of an experimental campaign. The concrete showed a density of 1665 kg/m 3 , a slump flow of 605 mm and a compressive strength of 22.3 MPa, at 28 days. These results are in agreement with the requirements, overcoming common lightweight concrete segregation problems.
Highlights
The buildings in the area which expanded from the citadel of Barcelona were designed by Ildelfons Cerdà
A filling material is placed between the arch and the upper floor, which is often formed by broken pottery or construction waste (1, 2)
Through the structural analysis using the finite elements method (FEM), it is verified that the structure presents a predominant unidirectional behaviour
Summary
The buildings in the area which expanded from the citadel of Barcelona were designed by Ildelfons Cerdà. A filling material is placed between the arch and the upper floor, which is often formed by broken pottery or construction waste (1, 2). The basic function of the filling material is to provide flatness at the upper side of the slab and to guarantee a monolithic structure, even though reinforcement is commonly not present over the beams. Vista inferior típica de los forjados estudiados. Typical bottom view of the slabs studied
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