Mortar typically will cure to 60% of its final compressive strength within the first 24 hours. It will then take about 28 days to reach its final cure strength.

Is mortar as strong as concrete?

Mortar is not as strong as concrete and typically is not used as a sole building material. Rather, it is the "glue" that holds together bricks, concrete block, stone, and other masonry materials.

Which type of mortar has the highest strength?

Type M mortar is the strongest of the four, and has a compressive strength of 2500 PSI. Type M mortar should be used when the structure has to withstand high gravity and/or lateral loads. Type M mortar is also a good choice for hard stone projects where the compressive strength of the stone is greater than 2500 PSI.