DELUCCHI , Marina

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Different variables can influence the crack-bridging ability (CBA) of a coating. These parameters can be related to: (i) the substrate, i.e. the way the crack opens and develops in the concrete; (ii) the substrate/coating interface, i.e. the adhesion of the organic coating to the concrete; (iii) the coating, i.e. its thickness and mechanical...

The crack-bridging properties of different organic coatings have been studied over a range of thicknesses and applied temperatures. In each case the data allowed to determine linear relationships between crack-bridging ability (CBA) and coating thickness. In addition, a direct correlation between crack bridging ability and elongation at break...

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The main properties of a protective coating for concrete and reinforced concrete structures are discussed. The importance of evaluating water and water vapour permeability is highlighted. Two new methods for testing water and water vapour permeability of protective coatings are presented. The reliability of these tests is studied. The proposed...

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The interest in using organic coatings to protect concrete structures has increased rapidly in recent years. One of the main parameters requested of these films for protecting structures is that they maintain their integrity even if the underlying concrete cracks. In this paper, a technique to evaluate the crack-bridging ability (CBA) of the...

Corrosion protection of coil-coated hot-dip galvanized (HDG) sheets against aggressive environments depends on several factors linked to galvanizing, chemical conversion, passivation, primer, topcoat. Each component gives a contribution to the ®nal anticorrosive performance of the coated product. The study of such a complex system needs proper...

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Le superfici in calcestruzzo si fessurano a causa della bassa resistenza a trazione del materiale: quando viene superata la sua capacità di deformazione, possono formarsi microcavillature, cavillature, fessurazioni o crepe che deturpano esteticamente il manufatto o ne riducono le caratteristiche di funzionalità, sicurezza e igiene. La...

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Some concern about the determination of a standardised test for crack-bridging ability (CBA) measurements exists. The present work focuses on the analysis of the results of experimental tests performed to simulate the mechanical behaviour of a coating when a crack in the beneath concrete opens and grows. The influence of the method of concrete...

This study was performed to investigate the electrochemical oxidation of anionic surfactants. In particular, a synthetic solution of sodium dodecyl benzene sulfonate and a real car wash wastewater were treated by galvanostatic electrolysis using a Ti–Ru–Sn ternary oxide and a boron-doped diamond (BDD) anode. Measurements of the Chemical Oxygen...

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A surface coating for concrete can be exposed to a wide range of environments, movements and stresses depending on which application the structure is used for. Therefore the coatings have different requirements to satisfactorily protect concrete constructions in different service environments. Water permeability is an important factor to be...

This paper reports an investigation of the effectiveness of a range of concrete coatings for reducing liquid water penetration and for allowing water vapour exchange between substrate and the external atmosphere. New methods for liquid water and water vapour permeability evaluation are presented.