Saturated-surface-dry
Encyclopedia
Saturated surface dry is defined as the condition of an aggregate
in which the surfaces of the particles are "saturated" (i.e., surface adsorption
would no longer take place), but the inter-particle voids
are otherwise dry. In this condition aggregates will not affect the free water content
of a composite material
.
If the mass of an oven dried test sample (Mdry) is compared to the mass of a saturated-surface-dry (Mssd) sample, the water adsorption (A) can be calculated:
Aggregate (composite)
Aggregate is the component of a composite material that resists compressive stress and provides bulk to the composite material. For efficient filling, aggregate should be much smaller than the finished item, but have a wide variety of sizes...
in which the surfaces of the particles are "saturated" (i.e., surface adsorption
Adsorption
Adsorption is the adhesion of atoms, ions, biomolecules or molecules of gas, liquid, or dissolved solids to a surface. This process creates a film of the adsorbate on the surface of the adsorbent. It differs from absorption, in which a fluid permeates or is dissolved by a liquid or solid...
would no longer take place), but the inter-particle voids
Porosity
Porosity or void fraction is a measure of the void spaces in a material, and is a fraction of the volume of voids over the total volume, between 0–1, or as a percentage between 0–100%...
are otherwise dry. In this condition aggregates will not affect the free water content
Water content
Water content or moisture content is the quantity of water contained in a material, such as soil , rock, ceramics, fruit, or wood. Water content is used in a wide range of scientific and technical areas, and is expressed as a ratio, which can range from 0 to the value of the materials' porosity at...
of a composite material
Composite material
Composite materials, often shortened to composites or called composition materials, are engineered or naturally occurring materials made from two or more constituent materials with significantly different physical or chemical properties which remain separate and distinct at the macroscopic or...
.
If the mass of an oven dried test sample (Mdry) is compared to the mass of a saturated-surface-dry (Mssd) sample, the water adsorption (A) can be calculated: