Analysis of Fly Ash Concrete With Scanning Electron Microscopy and X-Ray Diffraction

• Autorzy: Uzbaş Burhan , Aydın Abdulkadir Cüneyt

Identyfikatory

DOI

10.12913/22998624/114178

• Języki publikacji: EN

Abstrakty

EN

In this study, the effects of using different ratios of fly ash on hydration products as well as the mechanical and microstructural properties of hardened concrete were investigated. Portland cement was replaced with 5%, 10%, 15% and 20% fly ash (FA) by weight. The microstructural properties of the obtained samples were investigated by means of X-ray diffraction (XRD) and Scanning electron microscopy (SEM). Fly ash has negative effect on 7 days concrete strength; however, it was seen that fly ash increases the compressive strength of 28 and 90 days concrete. The XRD analysis showed that the ratio of calcium hydroxide (CH), which is produced by hydration, decreases depending on the concrete age and the amount of fly ash. The SEM analysis showed that the usage of fly ash decreases gaps and increases C-S-H which is also a hydration production. When Portland cement was replaced with 10% fly ash by weight, compressive strength has increased and microstructure of concrete has improved. The reason for this is filling of gaps by fly ash and the decrease in the amount of Ca(OH)2 due to the reaction between fly ash and Ca(OH)2. Within this scope, the development in microstructure of fly ash concrete was evaluated in 90 days duration and a change of the development with compressive strength was investigated.

Słowa kluczowe

EN

fly ash; microstructure of concrete; scanning electron microscopy; X-ray diffraction; calcium hydroxide

PL

popiół lotny; mikrostruktura betonu; skaningowa mikroskopia elektronowa; dyfrakcja rentgenowska; wodorotlenek wapnia

• Wydawca: Lublin University of Technology ; Polish Society of Ecological Engineering (PTIE), Branch of PTIE in Lublin
• Czasopismo: Advances in Science and Technology. Research Journal
• Rocznik: 2019
• Tom: Vol. 13, no 4
• Strony: 100--110
• Opis fizyczny: Bibliogr. 33 poz., fig., tab.

Twórcy

autor

Uzbaş Burhan

• Department of Civil Engineering, Faculty of Engineering, Atatürk University, Erzurum, 25240, Turkey

autor

Aydın Abdulkadir Cüneyt

• Department of Civil Engineering, Faculty of Engineering, Atatürk University, Erzurum, 25240, Turkey

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).