Jagged edges |
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Irregularities left on the edges of the tile due to
the use mainly of hand cutting tools.
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Jasper ware |
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A vitreous, opaque, colored unglazed ceramic ware
having white or contrasting relief-decorations and
containing a substantial amount of barite.
Originally developed by Josiah Wedgwood. (ASTM C
242).
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jiggering |
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Forming ceramic ware from a plastic body by
differential rotation of a profile tool and mold,
the mold having the contour of one surface of.the
ware and the profile tool that of the other surface.
(ASTM C 242).
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Jitterbug |
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A grate tamper for pushing coarse aggregate slightly
below the surface of a slab to facilitate finishing.
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Joint filler |
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Compressible material used to fill a joint to
prevent the infiltration of debris and to provide
support for sealants.
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Joint sealant |
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Compressible material used to exclude water and
solid foreign materials from joints.
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Joint, control |
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See Expansion joint. Joint, contraction. See
Contraction joint. Joint, expansion. See Expansion
joint.
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Jointer (concrete) |
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A metal tool about 6 in. (150 mm) long and from 2 to
41/2 in. (50'to 100 mm) wide and having shallow,
medium, or deep bits (cutting edges) ranging from
3/is in. to 3/a in. (5 to 20 mm) or deeper used to
cut a joint partly through fresh concrete.
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Journeyman |
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An experienced reliable worker who has learned his
trade and works for another person. |
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