Which division is Masonry? correct answers Division 4
Mortar correct answers binding agent between masonry units.
Four main ingredients in mortar: correct answers Portland Cement or Masonry Cement- bonding agent in the mortar.
Hydrated Lime- makes the mortar smooth and workable.
Aggregate (...
COSC 253 Exam 2 || with 100% Error-free Answers.
Which division is Masonry? correct answers Division 4
Mortar correct answers binding agent between masonry units.
Four main ingredients in mortar: correct answers Portland Cement or Masonry Cement- bonding
agent in the mortar.
Hydrated Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
What is grout? correct answers Grout is a filler. It is not considered a binding agent.
What do most architects require before the entire wall is constructed on a building? correct
answers A mock up
ASTM C270: Type M correct answers High strength mortar-structural walls; severe weather
exposure, below grade.
ASTM C270: Type S correct answers Medium strength mortar- structural walls; severe weather
exposure.
ASTM C270: Type N correct answers Medium strength mortar- used for most purposes, above
grade.
ASTM C270: Type O correct answers Medium or low strength- most economical; non-
loadbearing interior walls.
Portland cement- Lime mortar ingredients: correct answers Portland Cement- bonding agent in
the mortar.
Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
Masonry cement mortar ingredients: correct answers Masonry Cement- bonding agent in the
mortar.
Hydrated Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
What is Tuck pointing? correct answers The refilling of an existing joint from which some of the
mortar has been removed.
What is flashing? correct answers A membrane that you add to protect a joint, typically from
water.
, Flashing material: correct answers Sheet metal, bituminous fabric membranes, plastic sheet
materials, or a combination of these materials.
Where is flashing installed? correct answers Flashing is installed at vulnerable locations in
masonry; thresholds of doors, 90 degree angles...
What are weep holes? correct answers Holes to let condensation out of the wall.
What are the 3 classifications of Clay Masonry Units? correct answers Solid Masonry Units
Hollow Masonry Units
Architectural Terra Cotta
Clay Masonry Units Properties: correct answers Durability
Compressive Strength
Absorption
Size Variation
Natural Color
Texture
Brick correct answers Refers to solid clay masonry units
What is the difference between "nominal" and "actual"? correct answers Nominal includes the
joint thickness.
What is the most popular size modular brick? correct answers length- 7 5/8"
Width- 3 5/8"
Height- 2 1/4"
Joint- 3/8"
What is the construction advantage of a modular system? correct answers It is faster, there is less
waste, and it maximizes the use of material.
Grades of Building Brick: correct answers Grade SW- Severe Weathering; Foundations, below
grade, freezing.
Grade MW- Moderate Weathering; Exterior walls, above grade.
Grade NW- Negligible Weathering; all interior masonry.
Solid Clay Masonry Appearance: Type FBX correct answers Mechanical perfection
Sizes are consistent
Colors are consistent
Solid Clay Masonry Appearance: Type FBS correct answers Sizes start to vary more than FBX
colors start to vary more than FBX
Solid Clay Masonry Appearance: Type FBA correct answers Non-uniform color
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