Mortar Types
The mortar types from strongest (least workable) to weakest (most workable) are: Type M, Type S, Type N, Type O and Type K. To help remember this, think about MaSoN wOrK. Mortar should be weaker than the brick, so in renovation of old (weak) brick, use Type O mortar (K isn’t used anymore). Vee and concave mortar joints are acceptable for outdoors. Stripped, flush, weathered, extruded and struck hold puddles of water or are not sufficiently compacted. --Michael Ermann, Amber Book
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building fundamentals resource
olins construction book
Which is more preferred due to greater plasticity/workability?
Hi! I have memorized the Mason Works, but I never get this answer right. In a few materials now, N and S are very confusing. S is stronger laterally but different sources priorities lateral load differently one says its for outside for wind pressure another for interior because lateral forces on interior. Which one should I go with when going into the exam? What I'm gathering is that N can be used sometimes as exterior but mostly interior, but S primarily being used on the exterior. So, why would this answer be incorrect? Any thoughts?
Also, I missed another variation of this question that asked for workability of the hydrated lime, my understanding here also weaker the mortar the more workability. There were two options, N and S, and I picked N as being more workable, but I was also wrong again. This topic different textbook contradicting each other. I would love some feedback. Thank you.
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