Why the weakest part of a wall is its most vital feature
In short: It seems counterintuitive to use a soft material to hold together a hard one. This video explains why masonry engineering intentionally makes mortar weaker than brick to ensure structural integrity.
The core principle of masonry is balance. If mortar were as hard as the bricks it binds, the wall would lack the necessary flexibility to withstand environmental stresses. Instead, a softer mortar joint acts as a buffer, absorbing movement and protecting the bricks from cracking or shattering.
The video explores the evolution of these materials, contrasting traditional lime mortar with modern cement-based options. Understanding these differences is essential for proper construction and repair, as the wrong material choice can lead to long-term structural damage.
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Sources
- Summary by Intellect · source: Why Don’t They Make Mortar as Strong as Brick?
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