Eagle beak

A 6"x3/4" outside corner trim shape. (AC 106) Earthenware. A glazed or unglazed nonvitreous ceramic whiteware. (ASTM C 242).

Edge-mounted tile

A type of mounted tile wherein tile is assembled into units or sheets and are bonded to each other at the edges or corners of the back of the tiles by an elastomeric or resinous material which becomes an integral part of the tile installation. Units or sheets must meet criteria of back-mounted sheets. See definition for Mounted tile.

Edgebonded tile

See definition for Pregrouted tile.

Efflorescence

The residue deposited on the surface of a material by the crystallization of soluble salts. A finishing tool used on the edges of fresh concrete to provide a rounded corner.

Eggshelling

The texture of a fired glaze similar in apperance to the surface of an eggshell. (ASTM C 242). Electrical porcelain. Vitrified whiteware having an electrical insulating function. (ASTM C 242). Electrolysis. Production of chemical changes by the passage of current through an electrolyte.

Embossed

A decoration in relief or excised on the ware surface. (ASTM C 242).

Embossment

A decoration in relief or excised on the ware. (ASTM C 242).

Engobe

A slip coating applied to a ceramic body for imparting color, opacity or other characteristics, and subsequently covered with a glaze. (ASTM C 242).

Entrained air

Microscopic air bubbles intentionally incorporated into mortar or concrete during mixing, usually by use of a surface-active agent, typically between 10 and 1,000 N.m in diameter and spherical or nearly so. (See also Air entrainment.)

Epoxy adhesive

A two-part adhesive system employing epoxy resin and epoxy hardener used for bonding of ceramic tile to back-up materials.

Epoxy grout

A two-part grout system consisting of epoxy resin and epoxy hardener, especially formulated to have impervious qualities, stain, and chemical resistance, used to fill joints between tile units.

Epoxy mortar

A two-part mortar system consisting of epoxy resin and epoxy hardener used to bond tile to back-up material where chemical resistance of high bond strength is a consideration.

Epoxy resin

An epoxy composition used as a chemicalresistant setting adhesive or chemical-resistant grout.

Equilibrium eutectic

See Eutectic, equilibrium. Eutectic. See Eutectic, deformation; Eutectic, equilibrium.

Eutectic, deformation

The composition within a system of two or more components which, on heating under specific conditions, develops sufficient liquid to cause deformation at minimum temperature. (ASTM C 242). Eutectic equilibrium (eutectic). The composition within any system of two or more crystalline phases which melts completely at minimum temperature, or temperature at which such a composition melts. (ASTM C 242).

Expansion joint

A joint through tile, mortar, and reinforcing wire down to the substrate.

Exposed-aggregate finish

A decorative finish for concrete work achieved by removing, generally before the concrete has fully hardened, the outer skin of mortar and exposing the coarse aggregate.

Extra duty tile

See Special purpose tile.

Extruded tile

A tile or trim unit that is formed when plastic clay mixtures are forced through a pug mill opening (die) of suitable configuration, resulting in a continuous ribbon of formed clay. A wire cutter or similar cut-off device is then used to cut the ribbon into appropriate lengths and widths of tile. (TCA) Face-mounted tile. See under Tile, mounted.