Rentgenska praškovna difrakcija različnih vrst cementa

Drame, Laura (author), Meden, Anton (mentor)

Rentgenska praškovna difrakcija je metoda, ki omogoča karakterizacijo materialov in preučevanje polikristaliničnih snovi. Ker metoda temelji na periodični urejenosti kristalov, sipanju in interferenci rengenskih žarkov na periodični strukturi, gre za nedestruktivno metodo, saj lahko vzorec uporabimo za nadaljnjo analizo. Glavni cilj diplomskega dela je bila identifikacija kristalnih faz v različnih vrstah cementa in kamnolomskih agregatih. Zanimalo me je v kakšni meri se snovi v različnih vrstah cementa razlikujejo med seboj glede na njihovo področje uporabe. Analizirala sem petnajst različnih vzorcev – pet vzorcev kamnolomskih agregatov in deset vzorcev cementa – podjetja Salonit Anhovo, katerih cemente lahko kupimo v trgovinah z gradbenim materialom ali kar na njihovi spletni strani. Vzorci so bili posneti z rentgenskim praškovnim difraktometrom PANalytical X'Pert PRO. Po pridobljenih praškovnih difraktogramih sem izvedla primerjavo vzorcev z računalniškim programom X'Pert HighScore Plus ter nadaljevala kvalitativno analizo v računalniškem programu Crystallographica Search-Match. V tem programu sem difraktograme vzorcev primerjala z difraktogrami standardov iz podatkovne zbirke PDF-2. Z analizo sem potrdila glavne komponente cementa, manj uspešna sem bila pri določitvi nekaterih pomožnih snovi. Razlog za to je prisotnost posamezne snovi v zelo majhni količini in zato posledično niso bile opazne na difraktogramu. Razlog je lahko tudi, da se snov nahaja v amorfni obliki. Končni rezultati analize so se ujemali s sestavo, zapisano na spletni strani.

• Language: Slovenian
• Keywords: rentgenska praškovna difrakcija, cement, kamnolomski agregati, kvalitativna analiza
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2023
• PID: 20.500.12556/RUL-149562
• COBISS.SI-ID: 164598531
• Publication date in RUL: 07.09.2023

Secondary language

• Language: English
• Title: X-ray powder diffraction of various types of cement

Abstract

X-ray powder diffraction is a method that allows the characterization of materials and the study of polycrystalline materials. As the method is based on the periodic arrangement of the crystals, scattering and interference of the X-rays on the periodic structure, it is a non-destructive method, and the sample can be used for further analysis. The main objective of the thesis was to identify the crystal phases in different types of cement and quarry aggregates. I was interested in the extent to which the substances in different types of cement differ from each other in terms of their application. I analyzed fifteen different samples – five samples of quarry aggregates and ten samples of cement – from Salonit Anhovo, whose cements can be bought in shops with building supplies or on their website. Diffraction patterns of the samples were taken with a PANalytical X'Pert PRO X-ray powder diffractometer. After obtaining the powder patterns, the comparison of the samples was carried out by using X'Pert HighScore Plus and further qualitative analysis using Crystallographica Search-Match. In this program, the powder patterns of the samples were compared with those of the standards in the PDF-2 database. With my analysis I confirmed the main components of the cement, but I was less successful in identifying some of the additives. This is due to the presence of very small amounts of each substance, consequently they were not visible in the diffractogram. It may also be because the substance is in an amorphous form. The results of the analysis matched the composition on the website.

• Keywords: x-ray powder diffraction, cement, quarry aggregates, qualitative analysis