Concrete Definitions

Accelerator

A substance which, when added to concrete increases the rate of hydration which shortens time of setting. or increases the rate of hardening and strength development.

Aggregate

Granular material, such as sand, gravel or crushed stone used with a hydraulic cementing medium to produce concrete or mortar.

Air Entrained

Microscopic air bubbles intentionally incorporated in concrete during mixing to increase durability and resistance against damage by repeat freeze-thaw cycles and deicing chemicals.

Bag

A quantity of Portland cement: 94 pounds

Bag Mix

Specified at the time of ordering; the amount of cement expressed in bags per cubic yard of concrete. (i.e. 5bag, 5.5bag, 6.0bag) more bags = more strength.

Batch

Quantity of concrete mixed at one time.

Bleeding

The emergence of water from newly placed concrete caused by the settlement of the solid materials within the concrete.

Bull Float

A tool comprising a large, flat, rectangular piece of wood, aluminum, or magnesium usually 8 inches wide and 48 inches long and a handle 4 to 16 feet in length used to smooth unformed surfaces or freshly placed concrete.

Cubic Yard

Concrete is batched and sold by volume, not weight. To calculate volume required for your project use our online concrete calculator.

Curing

The maintenance of a satisfactory moisture content and temperature in concrete during its early stages so that desired properties may develop.

Gravel Mix

A concrete mix containing natural gravel coarse aggregate. Typically used for interior applications such as garage floors, basement floors and footings.

Limestone Mix

A concrete mix containing crushed limestone coarse aggregate . Typically used for exterior applications such as driveways , sidewalks and patios.

Performance Mix

Specified at the time of ordering in lieu of a bag mix; a concrete mix specified to meet minimum compressive strength requirements measured in pounds per square inch (i.e. 3000psi, 3500psi, and 4000psi) more psi = more strength and durability . Similar to a bag mix but achieves hardened characteristics by use of pozzolans or admixtures. A cost saving of $2.00 per cubic yard will be realized for equivalent bag mix. Also slows set times compared to a bag mix. Recommended for the weekend warrior.

Portland Cement

A hydraulic cement that sets and hardens by chemical interaction with water.

Ready Mixed Concrete

Concrete manufactured for delivery to a purchaser in plastic and unhardened state.

Screedlng

The operation of forming a surface by the use of screed guides (typically; forms) and a strike off.

*Set Time *

A measurement in hours and minutes of the stiffening of concrete as to resist to a degree of penetration.

Slump

A measure of consistency of freshly mixed concrete. Slump is measured in inches. It is the distance that freshly mixed concrete subsides when a conical mold (slump cone) is lifted from the test specimen

Sub Grade

The soil prepared and compacted to support a structure or pavement system; recommended to be granular and free of clay.