4 results listed
In this study, a general research was carried out on the structure, properties and areas of use of the graffen, which
is the material of the future, and for micro-scale investigate in cement; the element with cement properties reinforced with
graphene sheaths at different rates, was simulated in two dimensions using ABAQUS program, and tensile strength and
modulus of elasticity were investigated. Nowadays, since the production of the graphene is limited to the existing
technology, this important material can only be used in ultra-small elements and devices such as in the field of electronics,
physics, chemistry, health, energy and sports. With the development of the technology, it will be possible to produce the
graphene, which is about 200 times higher than the steel with strength, in large volumes and to be used in the construction
sector especially as a additive material in the concrete.
International Symposium on Light Alloys and Composite Materials
UHAKS
Heydar Dehghanpour
Kemalettin Yılmaz
In this study, the thermal conductivity of nano-porous alumina (Al2O3) was investigated. Porous coatings
are usually coated on a surface for various protection purposes. In the construction industry, nano-pore coatings
can be used to form heat insulation and hydrophobic surfaces. In recent years, advanced materials are taking place
of general materials in the construction sector with the development of nanotechnology. In the present study,
Al2O3 coatings with three different diameters of nano-porous at three different thicknesses were simulated with
the ABAQUS program and the heat transfer behavior was investigated.
International Symposium on Light Alloys and Composite Materials
UHAKS
Heydar Dehghanpour
Kemalettin Yılmaz
Recently, the use of carbon black in concrete has become widespread as it is in many composite materials.
According to different authors' researches, the carbon black is often used to improve the durability and electrical
conductivity of concrete. Carbon black is obtained either from natural sources or by pyrolysis method from waste
materials such as waste tires. In this study, it is aimed to obtain carbon black by the combustion method using the self-
fabricated device. SEM and EDS analyzes of the particulate material obtained by this method were performed.
Lately, as the number of automobiles increases, the demand for tires also increases and at the same time the
amount of waste tire in the surrounding area also increases. In recent years, extensive studies have been conducted on the
use of these waste tires in the construction sector [1]. Waste tire wires[2] and carbon black [3] can be evaluated as two
types of additive material using in concrete. Carbon black from waste tires are commonly obtained by pyrolysis method.
Although the pyrolysis method is a very efficient and common method, it requires a multidisciplinary procedure which is
costly and can not be practiced everywhere [4].
International Symposium on Light Alloys and Composite Materials
UHAKS
Heydar Dehghanpour
Kemalettin Yılmaz
In recent years, a new era has occurred in the development of construction materials with the expansion of
nanotechnology. As example, nowadays nano aerogels are used as heat and even sound insulation materials to protect
energy in buildings. In this study, nano silica-based aerogels with different volumes of Porosity was investigated at
different temperature differences (∆T) with the finite element (FE) method by using the ABAQUS program. The heat
flux and consequently the thermal conductivity was decreased with increasing porosity volume in models. At the same
time, with ∆T variation between 25 and 55 there was no significant difference in the thermal conductivity results.
However, when porosity volume exceeds 95 a quickly decrease in thermal conductivity was determined, opposite to the
real behavior. So that, comparing with other relevant studies, the optimum pore volume of the nano silica based aerogel
was resulted in 95 percent, in other words when the density is about 110 kg / m3. The results obtained are compared with
studies in the literature and the values are close.
International Symposium on Light Alloys and Composite Materials
UHAKS
Heydar Dehghanpour
Kemalettin Yılmaz