Guide Specifications for
Cold-Weather Masonry Construction
Section
Suggested Change
1.1
All materials shall be delivered in usable condition and stored to prevent
wetting by capillary action, rain and snow. Masonry units received at the
construction site must not be excessively wet. If visual inspection of the units
reveals surface moisture, some air drying must be allowed.
Note: Units in an intermediate moisture condition are most desirable. Very wet
units are prone to frost damage. Very dry units may excessively dry the mortar,
causing a weak layer.2
1.3 note
Some clay brick units require ... bond. For cold weather ... construction. When
sprinkling ... brick. Water shall ... when units are below 32 degrees F 0C (32F),
and water ... below 32 degrees F 0C (32F).
Concrete masonry units ... sprinkling.
2
PRODUCTS MATERIALS
2.1 note
... No changes in ... for Materials (products) are required ... construction. How-
ever, it is ... masonry.
1. Change to a higher ... 270. (Example: If ... M.)
2. omit
3. Without changing ... and maintaining 24 8 hr. thermal protection in Section
3.3, replace type I portland cement in the mortar with type III, ASTM C 150.
Use dry masonry units that are free of observable surface moisture. Wet or ...
3.2.1
laid.
Air temperatures ... between 40F (5C) and 120F 70F (20C).
3.2.2
Air temperatures ... between 40F (5C) and 120F 70F (20C). Maintain mortar
3.2.3
... above freezing at or above 40F (5C).
Air temperatures ... between 40F (5C) and 120F 70F (20C). Maintain mortar
3.2.4
... above freezing at or above 40F (5C). Salamanders or ... construction. Wind-
breaks shall ... 15 mph.
Air temperatures ... between 40F (5C) and 120F 70F (20C). Enclosure and
3.2.5
auxiliary ... above 32 degrees F 40F (5C). Temperature of units ... 20 degrees F
20F (7C).
3.3.1
Mean Daily ... for 24 hr. 8 hr. by ... membrane.
3.3.2
Mean Daily ... for 24 hr. 8 hr.
3.3.3
Mean Daily ... for 24 hr. 8 hr.
Mean Daily ... above 32 degrees F for 24 hr. 40F (5C) for 8 hr. by ... methods.
3.3.4
COLD WEATHER
PROTECTION
The Contractor ... above 32 degrees F 40F (5C) within ... areas.
1.2
2
T. Sneck (1972) The interaction between mortar and masonry units as a basis for standards for
masonry mortars. Joint RILEM-ASTM-CIB Symposium Proceedings, NBS Special Publication 361, vol. 1,
U.S. Department of Commerce, National Bureau of Standards, Washington, D.C.
53
Previous Page
