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Construction material.
Concrete is a composite construction material composed primarily of aggregate, cement, and water.
Hornfels may be used during construction projects or in the building of roadways. They may also be used as whetstones.
T.G Swansiger has written:
'Lightweight alumina refractory aggregate' -- subject(s): Lightweight construction--Periodicals
Some construction terms are aerator, aggregate, ducts, dry in, glaving, grade, girder, jumpers, king stud, knot, pedestal, penny, paver, punch out, punch list, and putty.