Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Characterization of morphology and hydration products of high-volume fly ash paste by monochromatic scanning x-ray micro-diffraction (mu-SXRD)
Date
2014-05-01
Author
Bae, Sungchul
Akgül, Çağla
Oh, Jaeeun
Moon, Juhyuk
Kunz, Martin
Monteiro, Paulo JM
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
51
views
0
downloads
Cite This
The present study focuses on identification and micro-structural characterization of the hydration products formed in high-volume fly ash (HVFA)/portland cement (PC) systems using monochromatic scanning x-ray micro-diffraction (mu-SXRD) and SEM-EDS. Pastes with up to 80% fly ash replacement were studied. Phase maps for HVFA samples using mu-SXRD patterns prove that mu-SXRD is an effective method to identify and visualize the distribution of phases in the matrix. mu-SXRD and SEM-EDS analysis shows that the C-S-H formed in HVFA system containing 50% or more of fly ash has a similar structure as C-S-H(1) with comparatively lower Ca/Si ratio than the one produced in PC system. Moreover, coexistence of C-S-H(1) and stratlingite is observed in the system containing 80% of fly ash, confirming that the amount of alumina and silicate phases provided by the fly ash is a major factor for the formation of C-S-H(I) and stratlingite in HVFA system.
Subject Keywords
General Materials Science
,
Building and Construction
URI
https://hdl.handle.net/11511/39407
Journal
CEMENT AND CONCRETE RESEARCH
DOI
https://doi.org/10.1016/j.cemconres.2014.03.001
Collections
Department of Civil Engineering, Article
Suggestions
OpenMETU
Core
Synthesis of copolymers of methoxy polyethylene glycol acrylate and 2-acrylamido-2-methyl-1-propanesulfonic acid: Its characterization and application as superplasticizer in concrete
Buyukyagci, Arzu; Tuzcu, Goezde; Aras, Leyla (Elsevier BV, 2009-07-01)
Water-soluble copolymers of methoxy polyethylene glycol acrylate (mPEGA) and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) were synthesized by free radicalic polymerization and evaluated as slump-retaining dispersant for cement particles. The slump-retaining effect of the synthesized copolymers was studied in terms of reaction pH, composition, and molecular weight of mPEG side chains. mPEG grafted copolymers (mPEGA-co-AMPS) were characterized by FTIR, H-1 NMR. In this study, dilute solution viscometry...
Determination of the elastic properties of amorphous materials: Case study of alkali-silica reaction gel
Moon, Juhyuk; Speziale, Sergio; Akgül, Çağla; KALKAN, BORA; Clark, Simon M; Monteiro, Paulo JM (Elsevier BV, 2013-12-01)
The gel formed during alkali-silica reaction (ASR) can lead to cracking and deterioration of a concrete structure. The elastic properties of the ASR gel using X-ray absorption and Brillouin spectroscopy measurements are reported. X-ray absorption was used to determine the density of the gel as a function of pressure, and the result yields an isothermal bulk modulus of 33 +/- 2 GPa. Brillouin spectroscopy was applied to measure isentropic bulk (24.9-34.0 GPa) and shear moduli (8.7-10.1 GPa) of the gel. The r...
Synthesis of special cement with fluidised bed combustion ashes
Selçuk Yüce, Nihal; Soner, I.; Selçuk, Emre (Thomas Telford Ltd., 2010-04-01)
Fluidised bed combustion (FBC) ashes containing a significant amount of free calcium oxide and calcium sulfate in addition to valuable inorganic acidic oxide ingredients such as silicon oxide, ferric oxide and aluminium oxide can be utilised as potential raw materials in the production of non-expansive belite-rich calcium sulfoaluminate cement, which is one of the special cement types having performance characteristics similar to those of ordinary Portland cement in addition to having lower energy requireme...
Structural and electrical characterization of Ag3Ga5Te9 and Ag3In5Se9 crystals
Parlak, Mehmet; Günal, İbrahim; Hasanlı, Nızamı (Wiley, 1998-01-01)
X-ray powder diffraction studies revealed that Ag3Ga5Te9 and Ag3In5Se9 crystallize in orthorhombic and tetragonal systems. respectively. The temperature dependent conductivity and Hall effect measurements have been carried out between 65-480 K. Ag3Ga5Te9 exhibits p-type conduction with a room temperature conductivity of 4.3 x 10(-4) (Omega.cm)(-1) and mobility less than 1 cm(2)/V.s. Ag3In5Se9 was identified to be n-type with room temperature conductivity 7.2 x 10(-5) (Omega.cm)(-1) and mobility 20 cm(2)/V.s...
A Novel Acetylcholinesterase Biosensor: Core-Shell Magnetic Nanoparticles Incorporating a Conjugated Polymer for the Detection of Organophosphorus Pesticides
Cancar, Hurija Dzudzevic; SÖYLEMEZ, Saniye; AKPINAR, Yeliz; KESİK, Melis; Goker, SEZA; Günbaş, Emrullah Görkem; Volkan, Mürvet; Toppare, Levent Kamil (American Chemical Society (ACS), 2016-03-30)
To construct a sensing interface, in the present work, a conjugated polymer and core shell magnetic nano particle containing biosensor was constructed for the pesticide analysis. The monomer 4,7-di(furan-2-yl)benzo [c] [1,2,5]-thiadiazole (FBThF) and core shell magnetic nanoparticles were designed and synthesized for fabrication of the biosensing device. The magnetic nanoparticles were first treated with silica and then modified using carboxyl groups, which enabled binding of the biomolecules covalently. Fo...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
S. Bae, Ç. Akgül, J. Oh, J. Moon, M. Kunz, and P. J. Monteiro, “Characterization of morphology and hydration products of high-volume fly ash paste by monochromatic scanning x-ray micro-diffraction (mu-SXRD),”
CEMENT AND CONCRETE RESEARCH
, pp. 155–164, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39407.