SPECIFICATIONS FOR CONCRETE MASONRY (Short
Hi-stress masonry cost more than the regular A.S.T.M. C-90-96.
Be sure to specify the f’m required. If you want a 3,000 P.S.I.
f’m you will need a block with a minimum P.S.I. of 3,570 a
grout with a 4000 P.S.I. and a type M mortar.
SPECIFICATIONS FOR CONCRETE MASONRY-SHORT FORM
Masonry Units shall be type II units conforming to A.S.T.M. C-90-96
and in addition the requirements of the Quality Control Standards
of the Concrete Masonry Association of California and Nevada, manufactured
by ORCO BLOCK. Texture (Precision; Split Face; Slumped) Orco color
or approved equal.
PORTLAND CEMENT shall conform to A.S.T.M. C-150, UBC 19-1.
MORTAR shall be freshly prepared and uniformly mixed
in the ratio by volumes, 1 part cement, ½ part Hydrated Lime,
3 parts sand, and shall conform to A.S.T.M. C-270, UBC 21-15 mortar
to match color of block.
GROUT shall be a fluid consistency and mixed in the
ratio by volumes, 1 part cement, 3 parts sand, or 1 part cement,
3 parts sand, 2 parts pea gravel.
REINFORCING STEEL shall be deformed bars conforming
to A.S.T.M. A-615 except that 1/4" ties may be plain bars.
Wire reinforcement shall conform to A.S.T.M. A-82.
Walls shall be laid true and plumb. Provisions
shall be arranged for all adjoining construction. Construct a 4'x6'
sample for workmanship, joint treatment, pattern and color of mortar
for approval. Tuck point all holes 1/8" or more.
here to download the file