  . A kind of "Elastic Composite, Reinforced Lightweight Concrete (ECRLC)" with
the mentioned specifics is a type of "Resilient Composite Systems (RCS)" in
which, contrary to the basic geometrical assumption of flexure theory in Solid
Mechanics, "the strain changes in the beam height during bending" is typically
"Non-linear". . Through employing this integrated structure, with significant
high strain capability and modulus of resilience in bending, we could
constructively achieve high bearing capacities in beams with secure fracture
pattern, in less weight. . Due to the system particulars and its behavior in
bending, the usual calculation of the equilibrium steel amount to attain the
low-steel bending sections with secure fracture pattern in the beams and its
related limitations do not become propounded. Thereby, the strategic deadlock
of high possibility of brittle fracture pattern in the bending elements made of
the usual reinforced lightweight concretes, especially about the low-thickness
bending elements as slabs, is being unlocked. . This simple, applied technology
and the related components and systems can have several applications in "the
Road and Building Industries" too. . Regarding the "strategic importance of the
Lightweight & Integrated Construction in practical increase of the resistance
and safety against earthquake" and considering the appropriate behavior of this
resilient structure against the dynamic loads, shakes, impacts and shocks and
capability of making some lightweight and insulating, non-brittle, reinforced
sandwich panels and pieces, this system and its components could be also useful
in "seismic areas". . This system could be also employed in constructing the
vibration and impact absorber bearing pieces and slabs, which can be used in
"the Railroad & Subway Structures" too. . Here, the "RCS" and "ECRLC" (as a
type of RCS) have been concisely presented.
