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Article
Relationships between Actual Compressive Strength, Modulus of Elasticity and Non-Destructive Tests of High Strength Concrete

Author: Jasim M. Abd
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2018 Volume: 36 Issue: 2 Part (A) Engineering Pages: 117-124
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The present research investigate with Nondestructive testing (NDT) of high strength concrete (HSC). An experiential work was carried out including both destructive and nondestructive test methods utilized to various concrete mixes with compressive strength ranged from 44 to 84.4MPa.Correlation curves were derived as pulse velocity and modulus of elasticity vs. compressive strength for high strength concrete. Two empirical relations were proposed for foretelling the modulus of elasticity Ec = 0.4141f`c + 8.6077, and compressive strengths fcu = 320.85ln (V) – 467.73 with a good coefficient of determination R2 for these equations 0.94and 0.90 respectively. Obtained from cubic and cylinders using locally available materials, therefore; it has been observed that NDT is rationally good and credible tool to measure the property of concrete and gives acceptable indication of the compressive strength development. Comparisons with the ACI 318 and the ACI 363 empirical equations for the prediction of the modulus of elasticity were performed. It was observed that the ACI 363 equation underestimates the modulus of elasticity, while the ACI 318 equation overestimates.


Article
Find semi- empirical relationship to calculate the electronic stopping power of Carbon and Oxygen ions in some organic compounds
استنباط علاقة شبه تجريبية لحساب قدرة الإيقاف الالكترونية لأيونات الكاربون والاوكسجين في بعض المركبات العضوية .

Authors: راشد عويد كاظم --- شهله عبد السادة كاظم
Journal: journal of kerbala university مجلة جامعة كربلاء ISSN: 18130410 Year: 2015 Volume: 13 Issue: 3 Pages: 79-90
Publisher: Kerbala University جامعة كربلاء

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Abstract

In this research find semi-empirical relationships to calculate the electronic stopping power of charged (Carbon ions and Oxygen ions) interacting with organic compounds : -[Polypropylene (C3H6), Polycarbonate (C16H14O3), Mylar (C10H8O4), Polyvinylalcohol (C2H4O), Polyoxymethylene (CH2O), Polyacrylonitrile (C3H3N), Polyvinylpyrrolidone (C6 H9 NO), Polyvinylacetate (C4H6O2), Kapton (C22 H10 N2 O5) , Bakelite (C44 H36 O6)] using the ratio 〈□(Z_2/A_2 )〉, within range of energy [0.01-1000] MeV, and by comparing the obtained results with the results of the SRIM 2012 program for the same projectiles in these compounds have shown good agreement with the results of the SRIM 2012.

تم في هذا البحث استنباط علاقة شبه تجريبية لحساب قدرة الإيقاف الالكترونية للجسيمات المشحونة (لأيونات الكاربون والاوكسجين) المتفاعلة مع المركبات العضوية [polypropylene(C3H6) ,Polycarbonate(C16H14O3), Mylar (C10H8O4), Polyvinylalcohol (C2H4O), Polyoxymethylene (CH2O), Polyacrylonitrile (C3H3N), Polyvinylpyrrolidone (C6 H9 N O) , Polyvinylacetate (C4H6O2) , Kapton (C22 H10 N2 O5) , Bakelite (C44 H36 O6) ] باعتماد النسبة 〈□(Z_2/A_2 )〉 , ضمن مدى الطاقة [ 0.01-1000] MeV , ومن خلال مقارنة النتائج المستحصلة مع نتائج برنامج الـ SRIM 2012 لنفس القذائف في تلك المركبات فقد أظهرت توافقاً جيداً مع نتائج الـ SRIM 2012 .


Article
Find semi- empirical relationship to calculate the electronic stopping power of protons & alpha particles interacting with some organic compounds
*استنباط علاقة شبه تجريبية لحساب قدرة الإيقاف الالكترونية للبروتونات وجسيمات ألفا المتفاعلة مع بعض المركبات العضوية

Author: Rashid Aweed Kadhim راشد عويد كاظم
Journal: journal of al-qadisiyah for pure science(quarterly) مجلة القادسية للعلوم الصرفة (فصلية). ISSN: 19972490 Year: 2016 Volume: 4 Issue: 21 Pages: 114-127
Publisher: Al-Qadisiyah University جامعة القادسية

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Abstract

In this research find semi-empirical relationship to calculate the electronic stopping power of charged(protons & alpha particles) interacting with organic compounds : -[Polypropylene (C3H6), Polycarbonate (C16H14O3), Mylar (C10H8O4), Polyvinylalcohol (C2H4O),Polyoxymethylene (CH2O), Polyacrylonitrile (C3H3N), Polyvinylpyrrolidone (C6 H9 NO),Polyvinylacetate (C4H6O2), Kapton (C22 H10 N2 O5) , Bakelite (C44 H36 O6)] using the ratio 〈

تػ فػا ىػحا الب ػ اسػتنباط علاقػة شػبو تجريبيػة ل سػاق قػاري افياػاؼ انلكترونيػة لمجسػيمات المشػ ونة الثايمػة )البروتونػات[polypropylene(C3H6) ,Polycarbonate(C16H14O3), Mylar وجسػػػيمات لفػػػا( المتفاعمػػػة مػػػا المركبػػػات الع ػػػوية(C10H8O4), Polyvinylalcohol (C2H4O), Polyoxymethylene (CH2O), Polyacrylonitrile (C3H3N),Polyvinylpyrrolidone (C6 H9 N O) , Polyvinylacetate (C4H6O2) , Kapton (C22 H10 N2 O5) , Bakeliteباعتماا النسبة 〉 ] (C44 H36 O6)0.01-1000 ] , ومف خلاؿ ماارنة النتػاج المست صػمة مػا ] MeV 〈 , مف ماى الطاقة. SRIM لنفس الاحاجؼ فا تمؾ المركبات فاا ظيرت توافااً جيااً ما نتاج الػ 2012 SRIM نتاج برنام الػ 201

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