A Brief in The Resilient Composite Systems (RCS) & ECRLC.pdf

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layers (particularly in the upper parts of the beam) and the conversion of some internal
compressive stresses to the internal tensile stresses (on the axis perpendicular to the
mentioned internal compressive tensions) in the in-compressing layers; B) The comparative
decrease of the thickness (height) of the in-tension layers (particularly in the lower parts of
the beam) and the conversion of some internal tensile stresses to the internal compressive
stresses (on the axis perpendicular to the mentioned internal tensile tensions) in the in-tension
In the under-bending sections of the "Resilient Composite Systems", the deformities
occurring in the "conjoined layers perpendicular to the applied load direction" during the
bending course are so that; "the initially plane sections perpendicular to the beam axis"
typically shift from "the plane status" to "the curve status" during the bending course.
Thereby, the basic geometrical assumption of the flexure theory in Solid Mechanics
("linearly" being of the strain changes in the beam height during bending) and the respective
trigonometric equations & equalities are mainly overshadowed in these systems.
In this way, through occurring of the remarked internal deformities in the strengthened matrix
during the flexure course, the stresses are more distributed and absorbed, and the rate of
increasing the internal stresses in the matrix (which could lead to the matrix plasticity and
crash) are reduced. Indeed, in these systems, the mentioned internal deformities in the beam
during the bending course cause the tendency of the so-called Neutral Axis of the beam to
move downward. (This tendency to move downward is opposite to the tendency of the
neutral axis of the beams made of the usual reinforced concrete to move upward during the
bending course.) Hence, the more strain capability of the beam is provided.
Indeed, due to the manner of the mentioned internal changes (in two different forms) in the
reinforced and conjoined lightweight matrix during the flexure course, we have "typically
non-linear strain changes in the beam height during bending" so that; this non-linearly being
is counted as the basic functional criterion (with its indices) of the Resilient Composite
● The "Elastic Composite, Reinforced Lightweight Concrete (ECRLC)" as a
type of Resilient Composite Systems (RCS):
The mentioned "Elastic Composite, Reinforced Lightweight Concrete (E.C.R.L.C.)" is a type
of the "Resilient Composite Systems (R.C.S.)". The RSC (with the mentioned general
structural properties and specific functional criteria) whose cement materials include the "CS-H (Calcium Silicate hydrate) crystals" have been termed ECRLC. [For instance, the
composition of "Portland cement and water", "Portland cement and water and Pozzolanic
materials", and "lime and Pozzolanic materials" all are among the cement materials which
comprise the C-S-H crystals.]
In view of the special pattern of the strain changes during the bending course in the particular
Resilient Composite System called ECRLC, this system, as an consistently functioning unit
with the reticular arrangement and texture, has more strain capability (especially within the
elastic limit), energy absorption capacity and bearing capacity in bending compared to the
usual reinforced concrete beams.
Obviously, employing the said hollow pores and/or lightweight aggregates (such as the
Polystyrene beads) in the matrix leads to the density decrease. [In this way, we can also get
access to the so-called thermal insulation, lightweight materials according to the case.]