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Register a new userThe effect of using recycled plastic waste on cement mortar property
تأثير استخدام النفايات البلاستيكية المعاد تدويرها على خصائص المونة الإسمنتية
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Added by
Tishreen University ورقة بحثية
Publication date
2013
fields
Civil Engineering
and research's language is
العربية
Created by
Shamra Editor
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تعتبر العمليات الصناعية المولّد الأساسي للنفايات، و قد ساهم الوعي البيئي المتزايد في التركيز على المخاوف المتعلقة بمسألة رمي النفايات. و تعتبر إدارة هذه النفايات أحد المخاوف البيئية الرئيسية في العالم، و مع قلة المساحات اللازمة و المستخدمة لطمر النفايات، بالإضافة إلى كلفة معالجتها العالية، كانت فكرة إعادة استخدام بعض هذه النفايات حلاً بديلاً لمسألة الطمر أو الحرق. و قد ركزت بعض الدراسات على استخدام بعضها كالإطارات التالفة و الألياف الزجاجية و البلاستيك و نواتج احتراق الفحم و غيرها كإضافات للخلطات البيتونية. يعالج هذا البحث دراسة استخدام أحد أنواع النفايات البلاستيكية (البولي إيتيلين) كمضاف للمونة الإسمنتية، و ذلك باستبدال أوزان مكافئة من الرمل في عينة المونة النظامية بالمادة البلاستيكية، و مراقبة مدى تأثيرها على خصائص المونة الإسمنتية من حيث المقاومة على الضغط البسيط و الشد بالانعطاف و التشرب الأعظمي بالماء و مقاومة الحرارة المرتفعة. تُظهر نتائج الدراسة انخفاضاً في المقاومة على الشد بالانعطاف و الضغط البسيط مع زيادة نسبة النفايات البلاستيكية، كما تزداد قيمة التشرب بالماء بزيادة نسبة البلاستيك. مع تسجيل نتيجة هامة تتمثل بزيادة ملموسة بالمقاومة على الشد بالانعطاف و الضغط البسيط بعد تعريضها للحرارة المرتفعة.
Manufacturing processes are the main source of waste materials, however the increasing awareness about the environment has tremendously contributed to the concerns related with disposal of the generated wastes. Solid waste management is one of the major environmental concerns in the world. With the scarcity of space for land filling and due to its ever increasing cost, waste utilization has become an attractive alternative to disposal. Research is being carried out on the utilization of waste products in concrete. Such waste products include discarded tires, plastic, glass, and coal combustion by-product. This paper presents a detailed review about recycled plastics (polyethylene), as aggregates to cement mortar by replace equivalent weight of sand by plastic in regular specimen and watch its effect on the property of mortar include compressive strength, splitting tensile strength, absorption and heating effect. It is clear that compressive strength, splitting tensile strength decreased with increase in plastic content but this property increases by exposing samples to high temperatures.
References used
BABOO, R. , RUSHAD, S. , BHAVESH, K. , DUGGAL, S. , K. Study of waste plastic mix concrete with plastcizer, National Institute of Technology patna, India, vol.2012, Article ID469272, 5
KHATIB, J. , KAUR, I. Use of recycled plastic in concrete, Elservier, India, 2008, 1835- 1852
PEZZI, L. , LUCA, P.D. , VUONO, D. , CHIAPPETTA, F. , NASTRO, A. Concrete products with waste plastic material (bottle, glass, plate), Materials Science Forum, 2006, vol. 514-516, no.2, 1753-1757
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The accelerated structural expansion in most countries has resulted in a major problem related to providing the necessary concrete for these buildings. Besides, the buildings that have become out of service recently has posed a real problem represent
ed in demolishing them creating a large amount of hard-to-manage aggregate.
The necessity to get rid of the aggregate have opened up the possibilities for attempting to use it as a relative substitute for the natural aggregate. The research focuses on recycling these aggregate in an attempt to use them in producing concrete and other construction materials. The research deals with one of the mechanisms of benefiting from these recycled aggregate through using them in producing concrete through treating the aggregate produced from demolition, and mixing them in quantities that reflect their actual ratio. The results are of great importance economically and environmentally.
This paper focus on studying the elastic of modified cement mortar by polyethylene (stress-strain) curve in order to have Young's elastic modulus, this made by tri-phases modeling that allow to determination the property of this item depending on t
he property of it's three components individual.
The validation of the proposed model has been studied extensively depending on a sample of cement mortar divided into two groups, the first one patterning normal cement mortar, second patterning modified cement mortar by Polyethylene witch substitute five percentage ratio of weight of sand by the same ratio of Polyethylene.
Modified cement mortar is treated as composite of three components, Sand, Paste cement and Polyethylene. It's will be proposed models involving series, parallel and series-parallel coupling. This composite action is described by series-parallel model in which a portion of paste acts in parallel with sand and polyethylene and the remaining portion in series with this parallel coupling. Then according to the model we get Young's elastic modulus theoretically, reliance basic modulus factors of components.
The proposed model is calibrated and verified by means of data set by experiment modulus results perform on cast samples in laboratory.
It was found quite agreement of measured modulus factors experimentally versus theoretically.
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.
The large increase in the volume of demolition concrete waste and its impact on the
environment has led to reconsider of using concrete demolition rubble as a partial or a
whole alternative of natural aggregates to produce new concrete which has th
e required
properties to use in engineering constructions[1]. With the possibility of improving the
mechanical properties of this concrete by processing this aggregates before using it or
support this concrete with fiber to improve its structural behavior.
This research deals with the study of the replacement the natural aggregates used in
concrete with recycled concrete aggregates resulting from the demolition rubble ,
according to different replacement ratiosranging between 0 % -25 % -50 % -75 % -100%
and the impact on the concrete behavior with a natural aggregates and determine the
optimal replacementpercentage.
The results showed a relative decrease in the concrete resistance on the simple
pressure , limited decrease in the volumetric mass also, and a slight adjustment to the
behavior of concrete under the loading effect by increasing the replacement proportion of
the natural aggregateswith recycled concrete aggregates..
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.
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