2.8.3
Hydrated Lime and Alternates
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NOTE: Lime alternates can increase spreadability.
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Hydrated lime shall conform to ASTM C 207, Type [S] [SA]. Lime alternates
which have a current ICBO, ICBO UBC, Evaluation Report number whose
findings state it may be used as an alternate to lime for Type M, S, N, and
O mortars will be deemed acceptable provided the user follows the
manufacturer's proportions and mixing instructions as set forth in ICBO
report.
2.8.4
Cement
Portland cement shall conform to ASTM C 150, Type I, [IA,] II, [IIA,] or
III, [IIIA]. Masonry cement shall conform to ASTM C 91, Type [N] [S] [M].
Containers shall bear complete instructions for proportioning and mixing to
obtain the required types of mortar.
2.8.5
Pre-Mixed Mortar
Pre-mixed mortar shall conform to ASTM C 1142, Type [RN] [RS] [RM].
2.8.6
Sand and Water
Sand shall conform to ASTM C 144. Water shall be clean, potable, and free
from substances which could adversely affect the mortar.
2.9
WATER-REPELLANT ADMIXTURE
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NOTE: For single-wythe, concrete masonry unit
exterior walls, specify water-repellant admixture
for both the masonry units and the mortar. This is
a regional requirement which shall be used, when
applicable, for SOUTHNAVFACENGCOM projects; when
appropriate, the requirements may be used for
projects in other areas. Use only with ASTM C 744
masonry units.
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Polymeric type formulated to reduce porosity and water transmission.
Construct panels of masonry units conforming to ASTM C 744 and mortar which
contain the water-repellant admixture. When tested in accordance with ASTM
C 1072, such panels shall have flexural strength not less than that
specified or indicated. When tested in accordance with ASTM E 514, panels
shall exhibit no water visible on back of test panel and no leaks through
the panel after 24 hours, and not more than 25 percent of wall area shall
be damp after 72 hours.
2.10
GROUT AND READY-MIXED GROUT
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NOTE: Low alkali cement should be specified for use
in grout if efflorescence caused by the use of
available cement is a problem.
SECTION 04200
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