Beneficial Reuse of Fly Ashes in Geotechnical Engineering With Physicochemical and Electron Microscopic Methods

Kang, Xin; Bate, Bate; Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

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Beneficial Reuse of Fly Ashes in Geotechnical Engineering With Physicochemical and Electron Microscopic Methods

2013-06-01
By Kang, Xin ; Bate, Bate

English

Details You May Also Like

Details:

Creators:

Kang, Xin ; Bate, Bate

Kang, Xin ; Bate, Bate Less -
Corporate Creators:

Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
Corporate Contributors:

United States. Dept. of Transportation. Research and Innovative Technology Administration
Subject/TRT Terms:

[+]

Electron Microscopy Fine Grained Soils Fly Ash Geotechnical Engineering Ground Settlement Kaolinite Micro Fabric Microstructure Physicochemical Properties Research Hub Sedimentation SEM Zeta Potential
Publication/ Report Number:

NUTC R286
Resource Type:

Tech Report
Geographical Coverage:

Missouri ; United States

Missouri ; United States Less -
TRIS Online Accession Number:

01493874
Edition:

Final Report
Corporate Publisher:

Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
NTL Classification:

NTL-HIGHWAY/ROAD TRANSPORTATION-Soils and Geology
Abstract:

The sedimentation behavior of fine grained soil is largely dependent on its pore fluid chemistry. Physicochemical properties of the pore fluid, such as ionic strength and pH, could greatly influence the micro structure of kaolinite which in turn influences the sedimentation behavior. Other than ionic effect, adding fly ash can also cause different sedimentation behaviors due to the change of gradation, increased ionic strength and pozzolanic reactions. There are several tests to characterize the kaolinite micro fabric, such as sedimentation test, grain size distribution test, viscosity test, zeta potential test, and scanning electron microscopy (SEM). The objective of this project was to investigate the influence of ionic concentration and fly ash on the sedimentation behavior of kaolinite. In addition, zeta potential and particle size distribution in supernatant and suspensions were measured and analyzed. The zeta potential of kaolinite was found closely related to the particle size, micro fabric and settling speed. It was found that an increase in the percentage of fly ash in the fly ash soil mixture could cause an increase in the settling speed. The addition of fly ash found more efficiency than the ionic concentration because the fly ash can not only interact with kaolinite particles, but also increase the ionic strength in the dissolution so that the kaolinite could flocculate and aggregate, which in turn increases the settling speed.
Format:

PDF
Funding:

DTRT06-G-0014
Collection(s):

University Transportation Centers US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:8a81e3fa542fff3374a0c0b5c445e71888555818ec78d6ec14b456316fc22a4c
Download URL:

https://rosap.ntl.bts.gov/view/dot/26360/dot_26360_DS1.pdf
File Type:

[PDF-922.64 KB]