ELAICH - Educational Linkage Approach in Cultural Heritage. For more information and presentations, please visit: http://elaich.technion.ac.il/ Choose the mortar mix

1. Educational Linkage Approach In Cultural Heritage Prof. JoAnn Cassar and Roberta De Angelis – University of Malta The Conservation Process Module 4 Basic Cour s e Exercises Topic 4.C Choose the mortar mix Educational Toolkit

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3. Educational Linkage Approach In Cultural Heritage 4.3 Choose the mortar mix Exercise 4-C This detail shows the external wall of a building in Malta. As you can see, the wall has lost the mortar between the stone blocks, and it needs to be repaired to prevent water from seeping through. The wall is starting to deteriorate; the stone is soft.

6. Educational Linkage Approach In Cultural Heritage 4.3 How should it be done? Exercise 4-C [ To the web organizer : these comments should appear as pop-ups when each mortar sample is overlapped on the stone sample by the students] Yes, this is an acceptable match! This mortar has the same properties of the freshly-quarried stone, but it may be too strong for a deteriorated wall. Its colour can be modified. Wrong match! This mortar is too strong for use with the weak masonry wall. Its colour is also difficult to modify (too dark). MIX 4 MIX 3 MIX 2 MIX 1 Well done! This is a good match! The colour is not very good but it can be modified easily by a conservator. Yes, this is a fairly good match. The colour is not very good but it can be modified . It is a weak mix and will work well with the deteriorated wall. It may need to be replaced often., especially if used on external walls.