adhesion between mortars and bricks

What is it about?

Cement – lime mortars for masonry were produced. The adhesion between mortars and bricks was measured. The microstructure of the mortars and the brick/mortar interface were investigated with microscopy. The adhesion results from physicochemical processes. The chemical composition and mixing ratio of raw materials should favour the formation of a Si-Al matrix with a low Ca content in the brick/mortar interface and the formation of fine Ca-Al-Si crystals penetrating into the brick.

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Why is it important?

- The adhesion was qualitatively and quantitatively measured with a simplified technique. - The microstructure of mortars and the brick/mortar interface were associated with the adhesion properties. - The findings are in agreement with results from the study of historic mortars as well as from the study of modern mortars and masonry units.