admixture - Answers 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 - Answers Materials such as crushed stone or gravel used as a filler in concrete and concrete
block.
Ashlar - Answers A squared or rectangular cut stone masonry unit; or, a flat faced surface having sawed
or dressed bed and joint surfaces.
Concrete masonry unit (CMU) - Answers A hallow or solid block made from portland cement and
aggregates.
Course - Answers A row or horizontal layer of masonry units.
Cube - Answers A strapped bundle of approximately 500 brick, or 90 standard block.
Grout - Answers 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
Joints - Answers The area between in each brick or block filled with mortar.
Masonry unit - Answers Any building block made of brick, block, cement, ashlar, clay, adobe, rubble,
glass, tile, or any other material that can be assembled into a structural unit.
Mortar - Answers a mixture of portland cement, lime, fine aggregate, and water, plastic or stiff enough
to hold its shape in between masonry units
Weephole - Answers A small opening in mortar joints or faces to allow the escape of moisture.
Wythe - Answers A continuous section of masonry wall, one masonry unit in thickness, or that part of a
wall that is one masonry unit in thickness.
Competent person - Answers An individual who is capable of identifying existing and predictable hazards
or working conditions that are hazardous, unsanitary, or dangerous to employees, and who has
authorization to take prompt, corrective measures to eliminate or control these hazards and conditions.
Occupational Safety and Health Administration (OSHA) - Answers the division of the US Department of
Labor mandated to ensure a safe and healthy environment in the workplace
Personal Protective Equipment (PPE) - Answers equipment or clothing designed to prevent or reduce
injuries
Bed joint - Answers The horizontal joint between two masonry units in separate courses.
Butter - Answers To apply mortar to a masonry unit prior to laying.