Specifications - Lord and Son Construction, Inc.

percentage specified for Type I units for the average annual relative humidity as
reported by the U.S. Weather Bureau Station nearest the project site.
E. Exposed Faces: Provide manufacturer's standard color and texture, unless
otherwise indicated.
2.3 MORTAR MATERIALS
A. General:
1. Concrete masonry: ASTM C91-99, Type S cement
2. Portland Cement: ASTM C150-99a, Type I, except Type III, may be used for
cold weather construction.
3. Masonry Cement: ASTM C91-99, Type S:
a. Mortar for Unit Masonry shall comply with ASTM C270-00. Type S with a
12 percent maximum air content shall be used.
4. Hydrated Lime: ASTM C207-91, Type S.
5. Aggregates: Shall comply with ASTM C144-02.
a. Where white and light colored mortars are specified or selected, white
mason’s sand shall be used. Sand color shall be approved by the
Contracting Officer for these locations.
6. Water: Clean, free from deleterious materials which would impair strength or
bond.
B. Do not lower the freezing point of mortar by use of admixtures or anti-freeze
agents. Do not use calcium chloride in mortar or grout.
C. Mortar for Concrete Masonry Units: Comply with ASTM C 270, Proportion
Specification. Provide the following types of mortar for applications stated unless
another type is indicated.
1. For all CMU, use Type N.
D. Mortar for Brick: Comply with ASTM C 270, Proportion Specification. Provide the
following types of mortar for applications stated unless another type is indicated.
2.4 ACCESSORIES
1. For all face brick, use Type N.
A. Reinforcing Bars: Deformed steel, ASTM A615, Grade 60 of the sizes shown.
B. Provide wire reinforcing and brick anchors in locations as indicated on Drawings.
1. Brick anchors to be adjustable veneer tie assemblies, anchored to CMU wall
MAHG121038 04 20 00 - 2 UNIT MASONRY