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Introduction to Masonry - Module 28101-04

Terms in this set (31)

admixture
A chemical or mineral other than water, cement, or aggregate added to mortar immediately before or during mixing to change its setting time or curing time, to reduce water, or to change the overall properties of the mortar.
aggregate
Materials such as crushed stone or gravel used as a filler in concrete and concrete block.
adobe
Sun-dried, molded clay brick.
alkaline
Bitter, slippery, or caustic.
American Society for Testing & Materials International
The publisher of masonry standards. ASTM
ashlar
A squared or rectangular cut stone masonry unit; or, a flat-faced surface having sawed or dressed bed and joint surfaces.
butter
Apply mortar to the end of a masonry unit.
capital
The top part of an architectural column.
concrete masonry unit (CMU)
A hollow or solid block made from portland cement and aggregates.
cornice
The horizontal projection crowning the wall of a building.
course
A row or horizontal layer of masonry units.
cube
A strapped bundle of approximately 500 standard bricks, or 90 standard blocks, usually palletized.
facing
That part of a masonry unit or wall that shows after construction; the finished side of a masonry unit.
footing
The base for a masonry unit wall, or concrete foundation, that distributes the weight of the structural member resting on it.
furrowing
Making an indentation with a trowel point along the center of the mortar bed joint.
grout
A mixture of portland cement, lime, and water, with or without fine aggregate, with a high enough water content that it can be poured into spaces between masonry units and voids in a wall.
head joint
A vertical joint between two masonry units.
hygroscopic
The tendency of a substance to absorb moisture.
joints
The area between each brick or block that is filled with mortar.
mason
A person who assembles masonry units by hand, using mortar, dry stacking, or mechanical connectors.
masonry unit
Any building block made of brick, cement, ashlar, clay, adobe, rubble, glass, tile, or any other material, that can be assembled into a structural unit.
mortar
A mixture of portland cement, lime, fine aggregate, and water, plastic or stiff enough to hold its shape between masonry units.
nonstructural
Not bearing weight other than its own.
parapet
A low wall or railing.
pilaster
A square or rectangular pillar projecting from a wall.
spread
A row of mortar placed into a bed joint.
stringing
Spreading mortar with a trowel on a wall or footing for a bed joint.
structural
Bearing weight in addition to its own.
tuckpointing
Filling fresh mortar into cutout or defective joints in masonry.
weephole
A small opening in mortar joints or faces to allow the escape of moisture.
wythe
A continuous section of masonry wall, one masonry unit in thickness, or that part of a wall which is one masonry unit in thickness.
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