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Article
Distribution of Major, Minor and Trace Elements in Iraqi Portland Cement
توزيع العناصر الرئيسة والثانوية والاثرية في الاسمنت البورتلندي العراقي

Author: Salem M. A. Al-DabbaghSahra M. O. Al-Maadhidee سالم الدباغ و
Journal: Iraqi National Journal of Earth Science المجلة العراقية الوطنية لعلوم الارض ISSN: 16823222 Year: 2003 Volume: 3 Issue: 1 Pages: 36-45
Publisher: Mosul University جامعة الموصل

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Abstract

The present study deals with the distribution of major oxides (Al2O3, CaO, Fe2O3, SiO2 wt%), minor oxides (Cl, K2O, MgO, MnO, Na2O, P2O5, TiO2 wt%), trace elements (Co, Cr, Cu, Ni, Zn ppm.) and the consituents of free lime, insoluble residue and loss on ignition in (38) representing different types of portland cement produced at ( 13) Iraqi factories during the interval 1997 / 1998. The study is concerned with variation in the chemical composition in relation to the nature of raw material or raw mix, burning, cooling and storing conditions and the content of major phases in ordinary, sulfate resistance and white portland cement.

تناولت الدراسة الحالية توزيع اكاسيد العناصر الرئيسة بالمائة وزنا (Al2O3 و CaO و Fe2O3 و SiO2) والثانوية بالمائة وزنا (Cl و K2O و MgO و MnO و Na2O و P2O5 و TiO2) والعناصر الاثرية ( ppm. Co و Cr و Cu و Ni و Zn) ومحتوى المكونات بالمائة وزنا من الكلس الحر والمواد غير الذائبة والفقدان بالحرق في (38) نموذجا تمثل انواع مختلفة من الاسمنت البورتلندي المنتج في (13) معملا عراقيا خلال الفترة المحصورة بين 1997 و 1998. تبحث الدراسة في تباين التركيب الكيميائي وعلاقته بطبيعةالمواد الاولية او المزيج الخام وظروف الانتاج من الحرق والتبريد والخزن فضلا عن محتوى الاطوار الاساسية للاسمنت البورتلندي الاعتيادي والمقاوم للاملاح الكبريتية والابيض.


Article
Calibration Free Laser Induced Breakdown Spectroscopy (CF-LIBS) as a tool for Quantitative Elemental Analysis of Iraqi Cement

Authors: Alaa J. Ghazai --- Hussein T. Salloom --- Alaa H. Ali --- Tagreed K. Hamad
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2018 Volume: 00 Issue: 1 Pages: 60-68
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Laser-induced breakdown spectroscopy (LIBS) is a promising atomic emission based elemental analysis technique that has many potential applications for various samples. This paper presents the implementation of calibration free laser induced breakdown spectroscopy (CF-LIBS) approach to identify and determine the concentration of elements in Iraqi cement samples collected from local market. Q-switched Nd: YAG laser with energy laser pulse of 100 mJ and pulse duration of 9 ns is focused on cement pellet surface to generate a plasma spark in air. The plasma emission spectrum was recorded by the spectrometer connected to the fiber optic and resolved spectra were used for identification and quantification of detected elements. The produced plasma temperature was obtained from the Boltzmann plot method while their electron density was determined by Saha-Boltzmann equation. The major elements such as Ca, Si, Al, Fe, Mg and minor Mn, Ti, K and Na elements have been identified and their concentrations calculated based on analysis of the spectrum that contain all information needed to derive the elemental composition of the cement matrix.

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