Innovative calcium carbonate-based products to repair cracked cement mortarsZuena, Martina (Avtor) Pondelak, Andreja (Avtor) Garbin, Enrico (Avtor) Panizza, Matteo (Avtor) Nodari, Luca (Avtor) Sever Škapin, Andrijana (Avtor) Škrlep, Luka (Avtor) Artioli, Gilberto (Avtor) Tomasin, Patrizia (Avtor) cement mortars20th century architecture conservationcalcium acetoacetatecalcium alkoxideconcrete repairopen accessThe durability of Portland cement mortars is often affected by environmental factors, which can cause physicochemical and mechanical degradation processes. In this study, the performance of three products, calcium acetoacetate and calcium tetrahydrofurfuryloxide dissolved in two different solvents developed and tested as stone consolidants, was evaluated in terms of crack filling or sealing and consolidation. Realistic cracks were induced in quasibrittle cement mortar prisms using a custom-designed test rig. The effectiveness and the performance of the considered treatments, investigated on specimens, were evaluated by optical and scanning electron microscopy, colourimetry, water absorption rate, ultrasonic pulse velocity, and surface hardness measurements. Results revealed that, in the examined conditions, the products were more suitable as surface consolidants than as crack fillers.Molecular Diversity Preservation International20222022-11-23 12:51:20Neznano15834sl© 2022 by the authors. Licensee MDPI, Basel, Switzerland