An innovative phosphate-based consolidant for limestone. Part 1: Effectiveness and compatibility in comparison With ethyl silicate

作者：Sassoni Enrico^*; Graziani Gabriela; Franzoni Elisa

来源：Construction and Building Materials, 2016, 102: 918-930.

DOI：10.1016/j.conbuildmat.2015.04.026

• Hydroxyapatite
• Tetraethylortosilicate
• TEOS
• Ammonium phosphate
• Inorganic consolidants
• Cultural Heritage
• Weathering
• Cohesion
• Ultrasonic pulse velocity
• Abrasion

For consolidation of weathered carbonate materials (such as marble, limestone and lime-based mortars) no fully satisfactory treatment currently exists. In this paper, an innovative phosphate treatment was investigated as a possible consolidant for limestone and compared with a commercial ethyl silicate (ES). The two treatments were evaluated in terms of effectiveness (i.e., ability to restore cohesion and mechanical properties, by measuring penetration depth, dynamic elastic modulus, tensile strength, resistance to abrasion) and compatibility (i.e., lack of any negative consequence on the original substrate, by assessing mechanical match, colour change, new phases composition, pore size distribution, water and water vapour transport properties, drying rate and thermal behaviour). The phosphate treatment proved to be very promising, being able to overcome some ES limitations.

• 出版日期2016-1-15