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Article
STUDY THE EFFECT OF NANO MATERIALS ADDITION ON SOME PROPERTIES OF CEMENT MORTAR

Authors: Fadhil A. Rasin --- Laith K. Abbas --- Mohammed J. Kadhim
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2017 Volume: 21 Issue: 5 Pages: 159-170
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

This study involves nano-materials addition and interaction with cement mortar behavior for many mortar samples under variable curing time with constant water to cement ratio (W/C = 0.5). In this research some properties such as (hardness and water absorption test), were affected by adding small ratios of nano-particles (SiO2 or Al2O3) as replacements to the Ordinary Portland Cement (OPC) / type (I). The percentages of nano materials additives replacement on the mixture of mortar include (1, 2, 3, 4 and 5%) for both nano materials with constant (W/C) ratio. Also the amount of the fine aggregate used was three times the amount of cement. The results showed that, the hardness of the mortars for both nano materials gives better properties than mortar without nano materials in all tests. Best enhancements in properties for mortars with nano silica were achieved with (3%) additives while were achieved with nano alumina at (2%) additives.

تتضمن الدراسة اضافة المواد النانوية وتداخلاتها مع سلوك مونة الاسمنت لكثير من العينات تحت تاثير اوقات متغيرة للمعالجة مع نسبة ثابة للماء وبنسبة (W/C = 0.5). في البحث الحالي بعض الخواص الميكانيكية(اختبارخاصية الصلادة) والفيزياوية (اختبار امتصاص الماء) ، تأثرت من خلال اضافة نسب صغيرة من جسيمات نانوية (SiO2 or AL2O3) وكأضافات الى الأسمنت البورتلاندي العادي (OPC) نوع (I). النسبة المئوية للمواد النانوية المضافة الى خليط من عينات مونة الاسمنت كانت (1، 2، 3، 4، 5%) لكلا المواد النانوية المضافة ، كما استخدم الركام الناعم بثلاثة أضعاف كمية من الاسمنت المستخدم. اضهرت النتائج تحسن وارتفاع صلادة مونة الاسمنت لكل العينات الحاوية على مواد نانوية بالمقارنة مع العينات بدون المواد النانوية المضافة ولكل الأختبارات. تم الوصول الى افضل تحسن في الخصائص للعينات المضاف اليها النانو السيليكا عند نسبة (3%) بالمقارنة مع العينات المضاف اليها النانو الومينا والذي تحقق بنسبة (2%) مواد نانوية مضافة.


Article
Improve Wear Resistance on Al 332 Alloy Matrix- Micro -Nano Al2O3 Particles Reinforced Composite
تحسين مقاومة البليان لسبيكة الالمنيوم A332 المقواة بدقائق سيراميكية ونانوية من الالومينا

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Abstract

The wear behavior of alumina particulate reinforced A332 aluminium alloy composites produced by a stir casting process technique were investigated. A pin-on-disc type apparatus was employed for determining the sliding wear rate in composite samples at different grain size (1 µm, 12µm, 50 nm) and different weight percentage (0.05-0.1-0.5-1) wt% of alumina respectively. Mechanical properties characterization which strongly depends on microstructure properties of reinforcement revealed that the presence of ( nano , micro) alumina particulates lead to simultaneous increase in hardness, ultimate tensile stress (UTS), wear resistances. The results revealed that UTS, Hardness, Wear resistances increases with the increase in the percentage of reinforcement of Al2O3 when compared to the base alloy A332. The wear rates of the composites were considerably less than that of the aluminum alloy at all applied loads with increasing percentage of reinforcement when compared to the base alloy A332.

ان سلوك البليان لسبيكة المنيوم A332 مدعمة بدقائق سيراميكية من الالومينا وباحجام مختلفة (12 مايكرون، 1 مايكرون، 50 نانومتر ) و بنسب وزنية مختلفة (0,05 ، 0,1، 0,5، 1) % وباستخدام تقنية السباكة احتسبت وباستعمال جهاز فحص العينات .ان خصائص المواصفات الميكانيكية تعتمد على توزيع الدقائق النانوية والمايكروية ، فهذا التوزيع ادى الى تحسن الصلادة وواجهاد الشد الاعلى ومقاومة البليان حيث ان مقاومة البليان تزداد بزيادة نسبة الالومينا. ان معدل البليان للمتراكبات يعتبر اقل من سبائك الالمنيوم تحت تاثير نفس الحمل مع زيادة نسبة الالومينا مقارنة بالسبيكة الاصلية.


Article
Study the Characterizations of Cement Mortar by Nano Pozzolanic Materials Additions
دراسة الخصائص لمونة الاسمنت باضافة مواد بوزلانية نانوية

Authors: Mohammed J. Kadhim محمد جواد كاظم --- Laith K. Abbas ليث قيس عباس --- Fadhil A. Rasin فاضل عبد رسن
Journal: Al-Khwarizmi Engineering Journal مجلة الخوارزمي الهندسية ISSN: 18181171 23120789 Year: 2017 Volume: 13 Issue: 4 Pages: 152-163
Publisher: Baghdad University جامعة بغداد

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Abstract

This study involves adding nano materials and interaction with cement mortar behavior for several mortar samples under variable curing time with constant water to cement ratio (W/C = 0.5). The effects of adding nano materials on the microstructure of cement mortar were studied by (Scanning Electronic Microscopy (SEM) and X-Ray (for samples at different curing time 28 and 91 days. Small ratio replacements of nano particles (SiO2 or Al2O3) were added to Ordinary Portland Cement (OPC) type (I). The percentage of nano materials additives replacement by weight of ordinary Portland cement includes (1, 2, 3, 4 and 5%) for both types of nano materials with constant (W/C) ratio, also the amount of the fine aggregate used was three times the amount of cement. The results showed that, the mortar consist of both nano materials had better microstructure than mortar without nano materials in all test. Best enhancements in properties and microstructure for mortars with nano silica were achieved with (3%) additives while were achieved with nano alumina at (2%) additives.

تتضمن هذه الدراسة اضافة المواد النانوية وتداخلاتها مع سلوك مونة الاسمنت لكثير من عينات المونة تحت تاثير اوقات معالجة متغيرة مع نسبة ثابتة من الماء/ الأسمنت تبلغ (W / C = 0.5).تم دراسة تأثير اضافة المواد النانوية على التركيب المجهري لعينات مونة الأسمنت باستخدام المجهر الماسح الالكتروني والأشعة السينية للعينات وبفترات زمنية مختلفة للمعالجة (28 و91 يوما). نسبة استبدال صغيرة من جسيمات النانو سيليكا او النانو الومينا (SiO2 AL2O3) اضيفت الى الأسمنت بعد استبدالها بوزن من الاسمنت البورتلاندي الاعتيادي (OPC) والنسب المئوية للمواد النانونية المضافة لخليط مونة الأسمنت تضمنت (1 ، 2 ، 3 ، 4 ، 5 %) لكلا النوعين مع نسبة ثابتة من (الماء / الأسمنت) ، كذلك تم استخدام كمية من الركام الناعم بثلاثة أضعاف كمية الاسمنت المستخدم. اظهرت النتائج أن البنية المجهرية لمونة الاسمنت للعينات الحاوية على مواد نانوية تكون افضل من العينات التي لاتحتوي على المواد النانوية وفي جميع الأختبارات. تم الوصول الى افضل تحسن في الخصائص والبنية المجهرية للعينات المضاف اليها النانو السيليكا عند نسبة (3%) بالمقارنة مع العينات المضاف اليها النانو الومينا والذي تحقق بنسبة (2%) مواد نانوية مضافة.


Article
EFFECT OF NANO-ALUMINA ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF RECYCLED CONCRETE

Authors: Farhad Mohammed Othman --- Alaa Aladdin Abdel-Hamead --- Raeid Kadhium Mohammed
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2018 Volume: 22 Issue: 2 (Part-1) Pages: 90-103
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

In this paper, the effect of using recycle mortar as fine aggregate replacement and nano Alumina (Al2O3) powder replaced of cement on the concrete microstructure and their effect on the mechanical properties is investigated. The nano powder was used as additive to replaced (0.5, and 2. 5 wt %) of cement with recycle fine aggregate(RFA) to replacement (10,and 50 wt%) of natural fine aggregate in concrete mixture. The compressive strength and microstructure analysis tests were carried out on the concrete samples. Microstructure analysis tests were conducted using X-Ray Diffraction(XRD), Scanning Electron Microscopy(SEM), and Atomic Force Microscopy(AFM). Results shows that the nano-oxide and recycle aggregate addition leads to different microstructure of concrete. The high specific surface area of nano-oxide causes reduce calcium hydroxide Ca(OH)2 (CH) crystallite in the cement hydration process and the pores structure of calcium silicate hydrated gel lead to products denser and compacted microstructure, also the roughness of concrete surface was reduces which caused enhancement in the compressive strength with the addition of nano- Al2O3


Article
Study the Effect of Nano Ceramic Particles on Some Physical Properties of Acrylic Resins

Author: Q.A. Hamad
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 2 Part (A) Engineering Pages: 124-129
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In the present research, study the effect of adding two different types of reinforcing particles, which included: nano-alumina (nano-Al2O3) and nano-silica (nano-SiO2), that added with different volume fractions of (1%, 2% and 3%), on some physical properties of composite prosthesis complete denture base materials by using self (cold) cure poly methyl methacrylate (PMMA) resin as new fluid resin matrix. In this research, the composite prosthetic dentures specimens consist of two groups were prepared by using (Hand Lay-Up) method according to the types of reinforced particles, which includes: the first group consists of PMMA resin reinforced by nano-alumina particles, and the second group consists of PMMA resin reinforced by nano-silica particles. The physical tests were performed on these specimens include (water absorption test and thermal behaviors test). The result of this study showed the values of (thermal conductivity and thermal diffusivity) properties increased with increasing the volume fraction of both (nano-Al2O3 and nano-SiO2) particles in PMMA complete denture base materials. While, the values of (water absorption and specific heat) properties decreased. In addition, the addition of (nano-Al2O3) particles has a noticeable effect on the all properties of composite material for prosthetic denture base specimens more than the (nano-SiO2) particles.


Article
INVESTIGATION SOME MECHANICAL PROPERTIES OF SELF CURED PMMA RESIN REINFORCED BYDIFFERENT TYPES OF NANO PARTICLES
الأستقصاء من بعض الخصائص الميكانيكية لراتنج البولي مثيل ميثا أكريليت المقوى بانواع مختلفة من الدقائق النانوية

Author: Qahtan Adnan Hamad قحطان عدنان حمد
Journal: Iraqi journal of mechanical and material engineering المجلة العراقية للهندسة الميكانيكية وهندسة المواد ISSN: 20761819 Year: 2017 Volume: 17 Issue: 3 Pages: 585-598
Publisher: Babylon University جامعة بابل

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Abstract

In the present research, study the effect of adding two different types of reinforcing particles, which included: nano-alumina (nano-Al2O3) and nano-silica (nano-SiO2), that added with different volume fractions of (1%, 2% and 3%), on the some mechanical properties of composite prosthesis complete denture base materials by using self (cold) cure poly methyl methacrylate (PMMA) resin as new fluid resin matrix . In this research the composite prosthetic dentures specimens consist of from two groups were prepared by using casting methods, type (Hand Lay-Up) method according to the types of reinforced particles which includes: the first group consists of PMMA resin reinforced by nano-alumina particles, and the second group consists of PMMA resin reinforced by nano-silica particles. The mechanical tests were performed on these specimens include compression test, impact test, and hardness test . The result of this study showed the values of (compression strength and hardness) properties increased with increasing the volume fraction of both (nano-Al2O3 and nano-SiO2) particles in PMMA complete denture base materials. While, the values of (impact strength) property decreased . Also the addition of (nano-Al2O3) particles has a noticeable effect on the most properties of composite material for prosthetic denture base specimens more than the (nano-SiO2) particles, except the impact strength property .

في هذا البحث تم دراسة تاثير اضافة نوعين مختلفين من دقائق التقوية تضمنت دقائق الالومينا النانوية ودقائق السيليكا النانوية والتي تمت اضافتهما بكسور حجمية مختلفة هي (%1%,2%,3)، على بعض الخواص الميكانيكية لمواد قاعدة طقم الاسنان الأصطناعية الكاملة المتراكبة, وذلك باستخدام راتنج البولي مثيل ميثا اكريليت المعالج ذاتياً كمادة أساس على شكل راتنج سائل جديد . في هذا البحث حضرت عينات أطقام الاسنان الأصطناعية المتراكبة باستخدام طرق السباكة, باستخدام طريقة (الصب اليدوي) على شكل مجموعتين هي: المجموعة الاولى تضم راتنج البولي مثيل ميثا اكريليت مقواة بدقائق الاولومينا النانوية، والمجموعة الثانية تضم راتنج البولي مثيل ميثا اكريليت مقواة بدقائق السيليكا النانوية.تضمنت الاختبارات الميكانيكية التي تم اجرائها على هذه العينات فحوصات الانضغاط، الصدمة، والصلادة للعينات. وقد أظهرت نتائج هذه الدراسة بان قيم خواص (مقاومة الانضغاط والصلادة) ازدادت مع زيادة الكسر الحجمي لكلا من دقائق الالومينا النانوية ودقائق السيليكا النانوية. بينما قلت قيم خواص (مقاومة الصدمة) . كذلك ان دقائق الالومينا النانوية تمتلك تاثير اكبر من دقائق السيليكا النانوية على أغلب خواص المواد المتراكبة لعينات قاعدة طقم الاسنان الأصطناعية, ماعدا خاصية مقاومة الصدمة .


Article
Investigation the Effect of Nano–Particles and Recycling Mortar Additives on Physical and Mechanical Properties of Concrete

Authors: Raeid K. Mohammed --- Farhad M. Othman --- Alaa A. Abdul-Hamead
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 3 Part (A) Engineering Pages: 295-303
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this paper a lower ratio of nano powder were used from (Al2O3 and ZrO2) (0.5, 1.5and 2. 5 wt %) from cement weight, the average particle size of nano-powder were (20nm). These powders were used in fabrication of Concrete with recycle fine aggregate was replaced Natural fine aggregate(sand) in order to be used in construction application and studies the effect on the concrete. Investigation were done on the concrete including dry density, water absorption%, porosity%, compression strength, and wear rate. The results shows that The nano-Al2O3, nano-ZrO2, and recycle aggregate were adding causes difference effect in the physical and mechanical properties of concrete. Compared with control concrete specimens (Co) results for same curing time, the density, and compression strength of concrete were decreased with addition recycle fine aggregate(RFA), while wear rate, water absorption, and porosity % were increased, the lower values of density, compression strength were decreased by (2.3%, 10.8% ), respectively, while the higher values wear rat for 7 and 28 day curing time, water absorption and porosity % were increased by (19.8%, 21.4%, 8.8%, and 5.6%), respectively were obtained with addition (50%)RFA. While, the addition nano-Al2O3 and ZrO2 with RFA were increasing the density, and compression strength, but decreasing wear rate, water absorption, and porosity %, the higher values of compression strength was increased by (9.8%), while the lower values water absorption and porosity % were decreased by (24.1%, and 16.6% ), respectively were obtained with addition (1.5%) of nano-Al2O3 and 50% RFA. But the higher values of density was increased by (9.8% ) and lower values of wear rate for 7 and 28 day curing time were decreased by (71.1%, and 66.9%), respectively was obtained with addition (1.5%) of nano-ZrO2 and 50% RFA.


Article
Study the Effect of Nano-Al2O3 and Fiber Glass on Mechanical and Physical Properties of PMMA Composites for Prosthetic Denture

Author: Qahtan A. Hamad
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 7 Part (A) Engineering Pages: 715-722
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In the present research, investigate the effect of adding some reinforcing materials which include nano-aluminum oxide (nano-Al2O3) particles that added with different volume fractions of (1%, 2%, 3% and 4%), and random fiber glass that added with fix volume fractions of (4%), into the PMMA matrix as new cold cure resin, and study some mechanical and physical properties of these hybrid laminated composite as prosthesis denture base material. Specimens’ of this project were prepared by using (Hand Lay-Up) method to form a hybrid laminated composites materials. The mechanical tests were performed on these specimens include (tensile test, impact test, flexural test and hardness test), while the physical test was thermal behavior test. Results of this study showed the values of (tensile strength, hardness, thermal conductivity and thermal diffusivity) properties increased when adding the (nano-Al2O3) particles in PMMA composite materials for prosthetic denture base materials. While, the values of impact strength and flexural strength properties were decreased.

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