Appeal No. 2002-2090
Application 08/430,311
stresses, and which said plain concrete is characterized as a
structural concrete whose maximum flexural strength is attained
at the cracking load thereof.
74. A load bearing concrete panel structure for use as
decking material in a bridge structure, said panel structure
being comprised of at least an upper layer of concrete and a
lower layer of concrete, each said layer of concrete having a
length dimension, a width dimension, and a height dimension of at
least three inches, said upper layer of concrete having an upper
surface which will come into contact with or be closely adjacent
to loads which traverse the panel structure wherein the
improvement comprises:
said upper layer consisting of plain concrete, said plain
concrete being a structural concrete in which said plain concrete
carriers all the flexural tensile stresses and which said plain
concrete is characterized as a structural concrete whose maximum
flexural strength is attained at the cracking load thereof, and
said plain concrete having a concrete formulation with concrete
shrinkage volume change compensating properties and adequate
tensile strength to resist stresses from temperature change and
concrete shrinkage change and
said lower layer includes structural flexural reinforcement
means for bending moment tensions stresses.
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