– The process by which a liquid is drawn into and tends
to fill permeable pores in a porous solid body; also, the increase
in mass of a porous solid body resulting from the penetration
of a liquid into its permeable pores.
Admixture – An admixture that will shorten the
set time of concrete.
– A material other than water, cement, and aggregate, used
to modify concrete’s freshly mixed, setting, or hardened
– A granular material such as crushed stone, sand, gravel,
or iron blast-furnace slag, used with a cementing medium to form
hydraulic-cement concrete or mortar.
Blast-Furnace Slag – The material resulting
from solidification of molten blast-furnace slag under atmospheric
conditions; subsequent cooling may be accelerated by application
of water to the solidified surface.
Content – The volume of air voids in cement
paste, mortar, or concrete, exclusive of pore space in aggregate
particles, usually expressed as a percentage of total volume of
the paste, mortar, or concrete.
Entraining Admixture – An admixture that through
agitation in production of fresh concrete causes the development
of a system of microscopic air bubbles that increase its workability
and aid in freeze/thaw resistance.
– Production of a quantity of concrete based on volume,
i.e….a cubic yard.
Weights – The measured amount of sand, stone,
cement, and water that make up a batch or “load” of
Slag – The nonmetallic product, consisting essentially
of silicates and aluminosilicates of calcium and other bases,
that is developed in a molten condition simultaneously with iron
in a blast furnace.
– Usually cylindrical in shape. Part of a footing or foundation.
Chloride – A 32% solution or a solid, when added to concrete
acts as a set accelerator.
– Known as Portland Cement, is a hydraulic product, which
means it sets and hardens when it chemically interacts with water
and is able to do this under water.
Material – An inorganic material or a mixture
of inorganic materials that sets and develops strength by chemical
reaction with water by formation of hydrates and is capable of
doing so under water.
Aggregate – Graded granular material with a
nominal maximum size ranging from 1-1/2” down to 3/8”.
– A composite material that consists essentially of a binding
medium within which are embedded particles or fragments of aggregate;
in hydraulic-cement concrete, the binder is formed from a mixture
of hydraulic cement and water.
– Action taken to maintain moisture and temperature conditions
in a freshly-placed cementitious mixture to allow hydraulic cement
hydration and (if applicable) pozzolanic reations to occur so
that the potential properties of the mixture may develop.
Compound – A liquid that, when applied as a
coating to the surface of newly-placed concrete, forms a membrane
that retards the evaporation of water and, in the case of white
pigmented compounds, reflects heat.
– In concrete, a series of cracks near to and roughly parallel
to features such as joints, edges, and structural cracks.
Aggregate – A graded granular material entirely
passing the 3/8” sieve.
Ash – The finely divided residue that results
from the combustion of ground or powdered coal and that is transported
by flue gases from the combustion zone to the particle removal
Blast-Furnace Slag – The glassy, granular material
formed when molten blast-furnace slag is rapidly chilled, as by
immersion in water.
– A cementitious mixture, with or without admixtures, that
is used primarily to fill voids.
Range Water Reducer (Superplasticizer) – An
admixture that can produce a high slump concrete or produce considerable
reduction of water with a minimal effect to set time.
– A layer of weak material derived from Cementitious material
and aggregate fines either: 1) carried by bleeding to the surface
or to internal cavities of freshly placed concrete, or 2) separated
from the concrete and deposited on the concrete surface or in
internal cavities during placement of concrete under water.
Aggregate – A low density aggregate such as
expanded clay or shale, used in lightweight concrete.
– A siliceous or siliceous and aluminous material, which
in itself possesses little or no Cementitious value but will,
in finely divided form and in the presence of moisture, chemically
react with calcium hydroxide at ordinary temperatures to form
compounds possessing Cementitious properties.
Admixture – An admixture that will lengthen
the set time of concrete.
– Fine aggregate resulting from natural disintegration and
abrasion of rock or processing of completely friable sandstone.
– The unintentional separation of the constituents of concrete
or particles of an aggregate, causing a lack of uniformity in
– The process, due to chemical reactions, occurring after
the addition of mixing water, that results in a gradual development
of rigidity of a cementitious mixture.
– Used to measure the consistency of ready mix concrete.
To perform the slump test, you fill an inverted funnel-shaped
cone with concrete. When the cone is removed, the concrete “slumps”.
The distance is measured to determine the slump.
Gravity – The ratio of mass of a volume of a
material at a stated temperature to the mass of the same volume
of distilled water at a stated temperature.
Barrier – A membrane such as 4 mil plastic placed
on grade that when fresh concrete is placed on top of, minimizes
the transmission of water vapor into and through the hardened
concrete from the sub-grade.
Reducing Admixture – An admixture that allows
a decrease in water without changing the slump of fresh concrete,
or, allows an increase in slump without an increase in water.
/ Cement Ratio – The Ratio of the mass of water,
exclusive only of that absorbed by the aggregates, to the mass
of portland cement in concrete, mortar, or grout, stated as a
of Concrete – That property determining the
effort required to manipulate a freshly mixed quantity of concrete
with minimum loss of homogeneity.
Site design and management by YourTechPro.com