Concrete

Concrete

Referring to an artificial, stonelike material used for various structural purposes, that is made from the drying and hardening of cement.

Industry: Building materials

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Concrete

jitterbug

Building materials; Concrete

A grate tamper used to bring sand and cement grout to the surface of wet concrete during placement of slabs. May be motorized or hand operated.

jacking stress

Building materials; Concrete

In prestress concrete, the maximum stress occurring in a tendon during stressing.

jacking force

Building materials; Concrete

The temporary force exerted by the jacking device which introduces tension into the tendons.

initial stress

Building materials; Concrete

In prestressed concrete, the stresses occurring in the prestressed members before any losses occur.

initial set

Building materials; Concrete

A degree of stiffening of the cement and water mixture. This is a degree less than final set and is generally stated as an empirical value, indicating the time in hours and minutes required for a ...

impermeable

Building materials; Concrete

The ability of a material or product to reduce or eliminate gaseous transmissions through it's mass; measured as the rate of Water Vapor Transmission (WVT). Note: Not all materials that are ...