Have fun, Nate.  I might so challenge myself some day.  Meanwhile, the
masonry contractor for Hill Auditorium, a 1913 Classical/Tapestry brick
building, is adjusting to the lime mortar spec, and doing just as you
describe, and as confirmed by Michael.  We're getting the mortar tested
as it ages, and the strength has increased from its initial set around
400 psi up to 1100 psi after 90 days, and still counting.  The mix
design is 1/4 part portland cement, 2 parts lime, and 7 parts sand to
match original pointing mortar.

The only trouble we've had is getting the contractor to clean off
pointing residue promptly to avoid aggressive acid washing of the
slow-curing mortar.


QUINN EVANS | ARCHITECTS

Ilene R. Tyler, FAIA

219 1/2 N. Main Street
Ann Arbor, MI  48104
[log in to unmask]
www.quinnevans.com
v 734.663.5888
f 734.663.5044

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