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Hydrated lime is not a necessary mortar ingredient. You can make mortar with just Portland cement, sand and water. The mortar that I used to permanently attach the brick and stone to my patios did not contain any hydrated lime. But adding hydrated lime to the mortar mix can be beneficial. The plasticity or workability of the mix will improve. When hydrated lime is added to the mix, the sand and the cement do not separate.
Crumbling mortar in brick walls and chimneys has to be cut out and replaced to avoid structural and water damage. Tuckpointingâcleaning out and remortaring the jointsâis easier than it looks if you have the right tools.uckpointing. Crumbling masonry joints start out ugly, and then things get uglier fastâbricks come loose, water seeps behind the wall and bees make their homes in the mortar holes. Let it go and the problem won't go away. In fact, the deterioration will accelerate and you'll have a much bigger fix on your hands.