ALA SCARPA DELLA GYPSOTHECA CANOVIANA DI POSSAGNO: DIAGNOSTICA E RESTAURO DEGLI ELEMENTI ARCHITETTONICI IN CALCESTRUZZO ARMATO

Antonio Borsoi1, Mario Collepardi1, Silvia Collepardi1, Emanuela Croce1, Glenda Fazio1, Fernando Fiorino2

1 ENCO srl Via delle Industrie 18/20 Ponzano Veneto (TV), croce@encosrl.it; www.encosrl.it;

2 Soprintendenza per i Beni Architettonici e Paesaggistici delle Province di Venezia, Belluno, Padova e Treviso.

ABSTRACT

The Scarpa’s area of the Gypsotheque in Possagno, is a wall structure with decorative reinforced concrete elements. In order to assess the safety aspects of a reinforced concrete structure three parameters must be examined: the concrete cover thickness, the carbonation depth, and the corrosion situation of the reinforcing bars. Only after knowing these diagnostic parameters, the repair can start by removing the carbonated concrete cover and then by applying a cementitious mortar in order to re-establish a basic environment (pH > 13) surrounding the steel reinforcements needed for their durability.

The diagnosis was based on the chemical-physical characterization of the structure, the determination of the conservation state, the identification of the mechanism of the deterioration process. During the repairing operation some specific products and their applications were set-up in order to save the existing materials as well as their aesthetical integrity.

The intervention repair has been continuously monitored since its realization in the autumn 2006 up to the present time indicating that it was very effective from both the functional and the aesthetical point of view.

Key-words: Scarpa, Reinforced concrete, Carbonation, Concrete cover