and non-shrink grout shall be as specified in Section [03300A CAST-IN-PLACE
STRUCTURAL CONCRETE][03300N CAST-IN-PLACE CONCRETE].
3.22
PROTECTION
Facing materials shall be protected against staining. Top of walls shall
be covered with nonstaining waterproof covering or membrane when work is
not in progress. Covering of the top of the unfinished walls shall
continue until the wall is waterproofed with a complete roof or parapet
system. Covering shall extend a minimum of 600 mm 2 feet down on each side
of the wall and shall be held securely in place. Before starting or
resuming, top surface of masonry in place shall be cleaned of loose mortar
and foreign material.
3.23
TEST REPORTS
3.26.1
Field Testing of Mortar
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NOTE: Delete this paragraph for structures having
185 square meters (2,000 square feet) or less of
wall area, including openings. See TM 5-809-3 and
ASTM C 780 for evaluating mortar test results.
**************************************************************************
At least three specimens of mortar shall be taken each day. A layer of
mortar 13 to 16 mm 1/2 to 5/8 inch thick shall be spread on the masonry
units and allowed to stand for one minute. The specimens shall then be
prepared and tested for compressive strength in accordance with ASTM C 780.
3.23.2
Field Testing of Grout
**************************************************************************
NOTE: Delete this paragraph for structures having
185 square meters (2,000 square feet) or less of
wall area, including openings.
**************************************************************************
Field sampling and testing of grout shall be in accordance with the
applicable provisions of ASTM C 1019. A minimum of three specimens of
grout per day shall be sampled and tested. Each specimen shall have a
minimum ultimate compressive strength of 13.8 MPa 2000 psi at 28 days.
3.23.3
Efflorescence Test
**************************************************************************
NOTE: Delete this paragraph in areas where
efflorescence has not been a problem. Efflorescence
is generally the result of poor design and
detailing. Properly covered or flashed walls are
generally free of efflorescence. Efflorescence
testing is generally not required.
**************************************************************************
Brick which will be exposed to weathering shall be tested for
efflorescence. Tests shall be scheduled far enough in advance of starting
masonry work to permit retesting if necessary. Sampling and testing shall
conform to the applicable provisions of ASTM C 67. Units meeting the
definition of "effloresced" will be subject to rejection.
SECTION 04200
Page 58
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