Glossary

A downward movement of a coating between application and curing, resulting in a characteristic appearance of a draped curtain.

Any finishing material that is applied with the primary purpose of stopping the absorption of succeeding coats.

The maximum shear stress that can be sustained by a material before rupture. The ultimate strength of a material subjected to shear loading, as determined in a torsion test.

The period of time which the manufacturer guarantees the unopened material will be useable.

The decrease in volume or contraction of a material by the escape of any volatile substance, or by a chemical or physical change in the material.

A measure of the consistency of concrete in inches. The distance the concrete slumps from its original 12” molded form.

A conical mold is filled in three layers with the concrete. After each layer, the concrete is puddled with 25 strokes of a rod. Concrete is evened off at the top of the mold and the mold removed. The slump is the space between a rod laid across the top of the mold and the molded concrete. ASTM C 143.

The dry ingredients remaining after evaporation of volatile solvents or water.

The property of a substance to dissolve in another and form a solution.

In a solution, the substance that dissolves another. A material used for thinning down a fluid or for cleaning purposes.

The ratio of the weight of any volume of a mass or substance to the weight of an equal volume of water at a given temperature.

Formulated quartz aggregates

The ability of a substance to remain unchanged, constant. The ability to restore to original condition after being disturbed by some force.

Discoloration caused by a foreign matter that chemically affects the base material.

The time period during which a packaged material can be stored under specified temperature conditions and remain suitable for use. Also called shelf life.

The change per unit length in a linear dimension of a specimen, usually expressed in percent (%). In most mechanical tests, strain is based on the original length of the specimen.

An applied force or pressure such as tension or shear that is exerted on a body to produce a resultant strain on the material. The ability of the material to withstand a stress depends on the strength of its cohesive force or molecular resistance.

A wide variety of materials used to alter surface phenomena. Wetting agents reduce surface tension and improve wetting and spreading; dispersants aid in the dispersion of pigments; defoamers inhibit foam formation; and emulsifiers cause or improve emulsion formation.

The micro roughness of the surface after proper surface preparation, generally expressed as the average height of the major peaks relative to the major valleys.

The property of a liquid that causes the surface to pull into the smallest area for a maximum volume, hence, drops are spherical.

See Surface Active Agents.