Plastic and rubber products considered of being a great importance to humans, but
their residues and wastes are a real environmental disaster. They are dumped in fields,
streams and forests or buried in large landfills that pose a serious hazard th
at needs to work
on solve it in the best possible way.
On the other hand, the economic problems caused by the erosion of concrete cement
have made it the major problem of infrastructure in the industrialized countries. Over the
past three decades, this problem has reached alarming proportions, which led to high repair
costs, whether in concrete or in reinforcing steel, Especially acidic media due to concrete
permeability of acid rainwater, where these costs exceeded initial construction amounts in
some cases.
This paper deals with the recycling of used tires and some types of plastic waste to
be used in the preparation of insulating materials for water and heat at a low cost compared
to the insulation materials currently used in the construction process, in addition to the
preparation of floor tiles for internal and external use.
In this research, we discussed an analytical
study of the seismic behavior of an internal joint, and we improved
the plastic response of the joint after observing the effect of the
concrete encasement to the column’s steel section along the
connection area.
This study aims to investigate the capacity of numerical
models to reproduce the monotonic behavior of reinforced concrete
framed structures.
This research was conducted in plastic house in Zahed local for organic
agriculture in Tartous in two agriculture season during(2014-2015)
and(2015-2016) to study the effect of solid and liquid organic fertilizer from
digstate in some Physical and Chimical Characteristics of Tomato fruit
(hybride Nesma) in green house.
This paper is concerned with an original analysis of an multiple pulse
position modulation (MPPM) scheme using graded-index plastic optical
fiber.
This paper presents the results of analyzing 17 models with
nonlinear static analysis. The models are 5, 10 and 15-story framewall
structures with Re-entrant corners. The participations of frames
to resist the shear force range between 25% and 60%
.
In this research a study was carried out to evaluate the effect of
adding random distribution plastic waste fiber inside soil on the
geotechnical properties of clayey soil. The research is based on
experimental method through many stages.
In the present paper, we study the effect of both morphology and
compatibilization on the reaction to fire of blends of recycled
poly(ethylene terephthalate) (PET) with recycled polycarbonate (PC).
In this research we studied the relationship between the optical conductivity Ϭop and
photon energy (hν), the absorbance coefficient (α), transmittance (T), the refractive index
(no), and the real part and imaginary part of dielectric constant (εr,
εi), the spinning velocity
of deposition device (v), for a specific wave length (600nm), for a pure thin film prepared
from an organic polymer material, Polystyrene (PS), by spin coating technique, on three
velocities ( 1000-2000-3000)RPM, in room temperature and 1atm.
It was shown that the PS film is a transmittive film with a transmittance values
reach ( 85 – 90 )% in the infrared region, and the optical conductivity Ϭop increased with
the photon energy, and for the velocity 1000RPM it took the highest value ( 1.67 X
1014 )1/sec, at the photon energy (hν =3.1 ev) and the wave length ( λ= 400nm ),
which means that the optical conductivity Ϭop is active in the visible region, and also it
decreases with the spinning velocity.
The values of energy gap for allowed direct transitions were (2.5ev), (2.4ev), (2.3ev)
for the films prepared on 1000RPM, 2000RPM, 3000RPM, and for the forbidden direct
transitions were (2.3ev), (2.2ev), (2.1ev) respectively .
The biggest value of Urbach energy Eu was (163mev) on the velocity 1000RPM and
the lowest value was (109mev) on the velocity 3000RPM.
In this study, we have designed and manufactured a simple and relatively
inexpensive solar cell, from the available materials in the local markets, where the cell is
contained of the outer body (Case), which is a plastic box on a parallel form of r
ectangles
of acrylic transparent allows the passage of light. It has resilient and high durability, and
two poles of red copper higher purity, one of them has been thermally treatment to
different temperatures (200, 300, 400°C), which turns the copper pole from carrier to semiconductor
(cuprous oxide, Cu2O), using heating device (Hot plate).
The other pole left without treatment and the electrolyte solution (Gel) has been
developed on the (Hydrogel), thus freeing electrons from the treatment plate to the
Hydrogel layer then to the clean plate (non-treatment), during shining light.
The results showed that the cell voltage proportional to the polyelectrolyte
concentration and the area of copper pole (cuprous oxide). As the experiments showed that
the temperature has an important role in transforming the metal carrier to the semiconductor,
and whenever this conversion possible whenever the pole of the light
sensitively more effective and efficient.
