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Term Definition
Abrasive
Substance utilized for wearing, grinding, cleaning, or polishing by rubbing
Abrasive Coatings
In closed paper coating, no adhesive is exposed because the paper surface is totally covered with abrasive; in open coating, the backing paper surface is covered with a regulated amount of abrasive that exposes the adhesive
Abrasive Paper
Paper with an abrasive surface such as sandpaper, emery paper and garnet paper
Abrasive Surface
Rough surface used for safety or warning
Abrasive Surface Tile
A slip resistant, rough floor tile, the abrasive surface tile is particularly useful in areas that receive rain and snow.
ABS Pipe
Plastic pipe used mainly for drain lines in 10 and 20 feet lengths and various diameters for plumbing stacks and drains
Absorbed Moisture
Moisture that has entered a solid material by absorption
Absorbent
Can suck up liquid, gas, or heat
Absorber
Blackened surface in a solar collector that absorbs solar radiation and transforms it to heat energy
Absorptance
Ratio of light absorbed by a material to incident light falling on the material
Absorption Chiller
System similar to a vapor compression chiller that doesn’t use a compressor; thermal energy (low pressure steam, hot water, or other hot liquids) produces the cooling effect
Absorption Coefficient
Ratio of the sound absorbed to the sound incident on the material or device; the sound absorbed is usually the sound energy incident on the surface minus the sound energy reflected.
Absorption Rate
How fast the real estate market absorbs new land or buildings during a specific time
Amount of water absorbed when a brick is partially immersed for one minute
Accelerator
Materials used to speed up the setting of mortar, grout, plaster or concrete
Access Control
Computerized security system used to protect against unauthorized entry into buildings or building areas
Access Door
Door that provides access to concealed equipment
Access Floor
Raised floor platform with removable panels that provides access below
Access Panel
Removable or swinging panel that provides access to concealed equipment or system components for inspection and maintenance
Accordion Folding Door
A folding, hinged, or creased door with rollers along a track
Accordion Partition
Folded, creased, or hinged dividing interior wall
Accumulator
Storage tank that receives liquid refrigerant from the evaporator and stops it from flowing into the suction line before vaporizing
ACM
Asbestos-Containing Material
Acoustical Block
A masonry block with sound-absorbing qualities, the acoustic block is often used in residential, industrial and commercial construction
Acoustical Materials
Materials that absorb sound waves
Acoustical Plaster and Plastic
Sound absorbing finishing materials used to reduce sound reverberation or noise intensity. Acoustical plaster and plastic is usually applied at 1/2 inch minimum thickness and provides a noise reduction coefficient of at least .45 decibels
ACRI
Air-Conditioning & Refrigeration Institute
Acrylic
Resinous polymers derived from esters, amides or other acrylic aid derivatives
Transparent plastic material in sheet form for window glass and skylights
Addendum (Addenda)
Written information that adds to the original bidding documents, that clarifies or changes them. Provided by the owner to the contractor during the bidding process and is part of the final contract documentation
Adhesive Application
Means to apply gypsum board using adhesives and additional mechanical fasteners
Adhesive Bond
How two materials in contact stick or adhere together by means other than cohesion
Adhesive Failure
Adhesive joint failure at the adhesive-adherent interface
Adhesive Spreader
A notched trowel used to apply laminating adhesives
Adhesive Wall Cups
Clips and nails with large perforated bases for mastic application to firm surfaces, adhesive wall cups are available in many shapes and sizes
Adhesive, Ceramic
Used for bonding tile to a surface; Rubber solvents and rubber– and resin-based emulsions are used as adhesives
Adhesive, Pressure-Sensitive
Adhesive that adheres to a surface at room temperature by brief pressure application
Adsorbent
Usually solid and able to attract molecules of liquids or gases that adhere to its surface
Adsorption
Process of attraction to a surface and attaching foreign molecules on the surface
Aerator
Round screened screw-on tip of a sink spout that mixes air and water to create a smooth flow