ACI 530.1 05 Table 2
ACI 530.1 05 Table 2
(OP)
ACI 530.1-05 Table 2
Why are there different strength units listed under Type M or S and Type N mortar?
What does this mean? That 2150 psi units can only be used with type N mortar?
Why are there different strength units listed under Type M or S and Type N mortar?
What does this mean? That 2150 psi units can only be used with type N mortar?






RE: ACI 530.1 05 Table 2
RE: ACI 530.1 05 Table 2
Check out Eng-Tips Forum's Policies here:
FAQ731-376: Eng-Tips.com Forum Policies
RE: ACI 530.1 05 Table 2
Dik
RE: ACI 530.1 05 Table 2
RE: ACI 530.1 05 Table 2
This table lists in the left two columns several types of BLOCKS (or as the table states - UNITS) and their associated net compressive strength. These
are the compressive strength of ONLY the block itself - not the MASONRY which combines blocks with mortar.
The far right column is the design compressive strength f'm of the MASONRY (i.e. blocks combined with mortar).
So if you are using blocks that provide 1900 psi strength (block only strength) and you use type N mortar, your design f'm would be 1350 psi.
So to your question - why the different types of BLOCKS in the left two columns? Probably due to limitations on testing perhaps? You are right - it doesn't make sense.
If you had a block that met the 2800 psi level, and you used Type N mortar - I would think that you'd have to use f'm = 1500 unless ACI 530 mentions interpolation here...which I doubt.
Check out Eng-Tips Forum's Policies here:
FAQ731-376: Eng-Tips.com Forum Policies
RE: ACI 530.1 05 Table 2
RE: ACI 530.1 05 Table 2
To define the lines, Table 2 must have simply used numbers from that plot to define the relationships, perhaps rounding up or down to get close to "typical" block strengths.
Check out Eng-Tips Forum's Policies here:
FAQ731-376: Eng-Tips.com Forum Policies