Recycling of Oily Sludge as a Roadbed Material Utilizing Phosphogypsum-Based Cementitious Materials
Joint Authors
Xiao, Wei
Yao, Xiao
Zhang, Fuyang
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-05-23
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Oily sludge is a hazardous waste containing emulsified petroleum hydrocarbons, water, heavy metals, and solid particles.
The objective of this work is to employ solidification/stabilization (S/S) techniques to utilize oily sludge as a roadbed material with ordinary Portland cement (OPC), fly ash (FA), and silica fume (SF) as binders and phosphogypsum (PG) as a stabilizer.
The efficacy of the S/S process is assessed mainly through an unconfined compressive strength (UCS) test and a toxicity leaching test.
Road performance, including water stability, freeze-thaw resistance, and volume stability, is also tested on the solidified samples.
The mineralogical compositions, microstructures, and pore structure are characterized through X-ray diffractometry (XRD), scanning electron microscopy (SEM), and mercury intrusion porosimetry (MIP).
The results show that the addition of 20% binders (OPC : FA : SF = 1 : 0.7 : 0.8) in combination with phosphogypsum to the oily sludge not only increases the 28-day compressive strength of the solidified samples and remarkably decreases the release of heavy metals but also refines the pore structure and compacts the microstructure.
The solidified body had sufficient strength and good water stability performance, freeze-thaw resistance, and volumetric stability.
This solidification/stabilization (S/S) process, which combines oily sludge treatment and phosphogypsum resource utilization, significantly enhances environmental protection and renders the solidified product economically profitable.
American Psychological Association (APA)
Xiao, Wei& Yao, Xiao& Zhang, Fuyang. 2019. Recycling of Oily Sludge as a Roadbed Material Utilizing Phosphogypsum-Based Cementitious Materials. Advances in Civil Engineering،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1116698
Modern Language Association (MLA)
Xiao, Wei…[et al.]. Recycling of Oily Sludge as a Roadbed Material Utilizing Phosphogypsum-Based Cementitious Materials. Advances in Civil Engineering No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1116698
American Medical Association (AMA)
Xiao, Wei& Yao, Xiao& Zhang, Fuyang. Recycling of Oily Sludge as a Roadbed Material Utilizing Phosphogypsum-Based Cementitious Materials. Advances in Civil Engineering. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1116698
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1116698