Effect of Using Cement Kiln Dust as a Nano-Material on the Strength of Cement Mortars

In this experimental study, the effects of using nano-sized Cement Kiln Dust (CKD) as a partial replacement for Ordinary Portland Cement (OPC) on the strength of cement mortars is investigated. The CKD was milled up to 4 hours in a planetary ball mill. In addition to the control cement mortar mixtur...

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Bibliographic Details
Published in:KSCE journal of civil engineering 2018, 22(4), , pp.1361-1368
Main Authors: Alnahhal, Wael, Taha, Ramzi, Al-Nasseri, Hammad, Nishad, Safna
Format: Article
Language:English
Subjects:
Atmospheric particulates
Ball milling
Cement
Chemical composition
Civil Engineering
Composition
Compressive strength
Concrete
Dust
Dust storms
Electron microscopes
Engineering
Geotechnical Engineering & Applied Earth Sciences
Industrial Pollution Prevention
Kilns
Mixtures
Mortars (material)
Portland cement
Portland cements
Scanning electron microscopy
Structural Engineering
X-ray diffraction
토목공학
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Summary:In this experimental study, the effects of using nano-sized Cement Kiln Dust (CKD) as a partial replacement for Ordinary Portland Cement (OPC) on the strength of cement mortars is investigated. The CKD was milled up to 4 hours in a planetary ball mill. In addition to the control cement mortar mixture with 0% CKD, a total of 28 concrete mortar mixtures were prepared with four different replacement percentages of nano-CKD (5, 10, 15, and 20 %), and seven different milling times (1, 1.5, 2, 2.5, 3, 3.5, and 4 hours). The compressive strengths of all cement mortar mixtures were evaluated after curing periods of 7, 28, and 56 days. In addition, the chemical, physical and microscopical properties of the nano-CKD were evaluated using Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM) and X-ray diffraction (XRD). The experimental results showed that the partial replacement of the OPC with the nano-CKD enhanced the compressive strength of the cement mortar by about 15-30% compared with normal mortar without CKD. Moreover, the experimental results indicated that no change was observed in the chemical composition of CKD after 4 hours of milling. However, there was a decrease in the Portlandite content in parallel with an increase in the density and the surface area.
ISSN:1226-7988
1976-3808
DOI:10.1007/s12205-017-0010-6