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Limiting salt crystallization damage in lime mortar by using crystallization modifiers

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Author: Granneman, S.J.C. · Shahidzadeh, N. · Lubelli, B.A. · Hees, R.P.J. van
Source:Third International Congress on Salt Weathering of Buildings and Stone Sculptures, 14-16 October 2014, 525-526
Identifier: 517622
Keywords: Architecture · Buildings and Infrastructure · Built Environment · Building Engineering & Civil Engineering · SR - Structural Reliability · TS - Technical Sciences


Salt crystallization is a recurrent cause of damage in porous building materials. Lime-based mortars, which were widely used in construction of ancient masonry, are especially prone to salt damage, due to their low mechanical strength. Existing solutions to tackle salt damage in mortars have been mainly focussed on increasing the mechanical strength of the mortar by the replacement of lime with (Portland) cement, or on reducing the moisture transport capacity by the addition of silicone-based water repellent products. Both solutions often showed to have a limited resistance to salt decay and low compatibility with historical buildings