Effect of Fly Ash on Leaching Characteristics of Cement-Stabilized Macadam Base

To study the leaching characteristics of a cement-stabilized macadam base with fly ash, a calcium leaching test, using varying cement and fly ash dosages in an ammonium chloride solution, was designed to obtain the rate of calcium ion leaching, porosity, and permeability coefficient of cement-stabil...

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Bibliographic Details
Published in:Materials 2021-10, Vol.14 (20), p.5935
Main Authors: Lun, Dian, Yuan, Taiping, Yang, Xiaolong, Rong, Hongliu, Shi, Junjie, Pan, Minqiang
Format: Article
Language:English
Subjects:
Aggregates
Ammonium chloride
Calcium ions
Cement
Chloride
Coefficients
Concrete
Corrosion
Dosage
Epoxy resins
Fly ash
Graphene
Heat resistance
Highway construction
Landfill
Leaching
Permeability
Tensile strength
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Summary:To study the leaching characteristics of a cement-stabilized macadam base with fly ash, a calcium leaching test, using varying cement and fly ash dosages in an ammonium chloride solution, was designed to obtain the rate of calcium ion leaching, porosity, and permeability coefficient of cement-stabilized macadam with leaching time. The results showed that the number of leached calcium ions increased with the cement dosage in the leaching of cement-stabilized macadam. With an increase in the cement dosage, the leaching rate of calcium ions decreased, and the leaching process of the material was delayed. The incorporation of fly ash could effectively slow down the degree of calcium ion leaching. The permeability coefficient increased gradually with the extension of leaching time, and the increase in fly ash content had a more significant effect on the improvement of the permeability coefficient than the increase in cement dosage did.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14205935