Use the information supplied from Appendix B of

the masonry code (NZS 4230) to determine the characteristic masonry compressive

strength given i) the concrete masonry unit has a void equal to half the gross

area, the mean compressive strength of the unit = 20 MPa with a standard

deviation of 2 MPa, ii) the grout has a mean compressive strength of 23 MPa

with a standard deviation of 3 MPa?

f_m = 0.59

α

f