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Register a new userA Study on Recycling the Bituminous Pavements
دراسة إعادة استخدام مواد الطبقات السطحية الإسفلتية
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فايز سليمان( باحث )
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تظهر أهمية دراسة هذه المسألة في تحقيق جملة من الأهداف أهمها : اختبار مواد القمصان الإسفلتية الناتجة عن عملية الكشط لتحديد خواصها و صلاحيتها لإعادة الاستخدام وفقا لعمرها , و الفاقد منها و الوفر الناتج من ذلك.
studying the recycling of bituminous pavements is important to achieve a set of objectives. The most important one is to examine the asphalt obtained from the recycled bituminous pavements in order to identify its properties and suitability for reuse according to its serviceability, reductions and cost benefit.
References used
AL SHWETY .N , 2013 - Effect Recycled Bituminous Pavements Properties – in the central region- on the treatment ways and the area of hot mix recycling . Master thesi , Albaath University , Syria ,466p
ANDERSON .R , 2006 - Recommended Use of Reclaimed Asphalt Pavement in the Superpave Mix . Washington : National Academy Press ,175p
ASSI .M , 2003 - Engineering of Paving Layers . Aleppo University , Syria , 333p
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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.
Asphalt concrete was used for the first time in Syria as a tightening material for dam
Sourani. It was used in this dam as a surface facing on the front slope.
Use of asphaltic concrete under climatic conditions prevailing in Syria, particularly
h
igh temperatures, is discussed in the paper. To achieve this goal, a number of bituminous
concrete mixes, designed using the same constituent components in Sourani dam, were
experimentally tested and analyzed. To determine the effect of the expected maximum
temperatures for Sourani dam, a program depending on Energy balance was developed.
Possible methods of reducing the effect of the high temperature in order to increase
the stability of the asphalt surface facing are analyzed. In this context, the facing was
plastered by a light-color, which led to a decrease in the temperature of the asphalt surface
facing by about 20 degrees Celsius. The facing was also plastered by placing a concrete
layer above it, which led to a decrease in the temperature of the asphalt surface facing by
about 25 degrees Celsius.
This research demonstrated a way to study the thermal properties
of raw and recycled High Density Polyethylene HDPE which is
used to make oil containers. Also, the research has dealt with the
effect of recycling on blow molding process used to manufacture
these containers.
Compacting hot mixes asphalt (HMA) at low temperatures or mixing it in the asphalt at high temperatures is a constant source of concern to researchers, as compacting and mixing at non-ideal temperatures leads to adverse results, which negatively affect the properties of asphalt concrete and lead to problems paving.
This study includes an experimental work to determine the effect of dilution on
Hardfacing welding of clinker hammer crusher. In this work, samples have been prepared
from the same metal type of hammer’s, of which is X120Mn12. Then the samples had
been hardfaced using deferent kind of hardfacing Shielded Metal Arc Welding electrodes,
and using deferent welding parameters (current, polarity), the calculation and measuring of
dilution had done and then performed the hardness tests, wear tests, and their relation with
dilution.
This study showed that the reduction of heat input decreases dilution as the hardness
of hardfaced samples increases and wear decreases.
Direct current electrode positive (DCEP) increase dilution as the hardness of
hardfaced samples decreases and wear increases, but the quality of the welding became
better. Results showed that percentage of chromium and carbon in electrodes have positive
effect on hardness.
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