Effects of fly ash properties on characteristics of cold-bonded fly ash lightweight aggregates

The study presented herein provides a new insight into the effects of physical and chemical properties of the fly ash on the characteristics of the cold-bonded fly ash lightweight aggregates. LWAs were manufactured through the cold-bonding pelletization of two fly ashes differing in their physical a...

Full description

Saved in:
Bibliographic Details
Published inConstruction & building materials Vol. 21; no. 9; pp. 1869 - 1878
Main Authors Gesoglu, Mehmet, Ozturan, Turan, Guneyisi, Erhan
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2007
Elsevier B.V
Subjects
Analysis
EDX
ESEM
Fly ash
Lightweight aggregate
Lightweight concrete
Microstructure
Properties
United States
Lightweight aggregate
EDX
Fly ash
Lightweight concrete
Microstructure
ESEM
Online AccessGet full text

Cover

More Information
Summary:The study presented herein provides a new insight into the effects of physical and chemical properties of the fly ash on the characteristics of the cold-bonded fly ash lightweight aggregates. LWAs were manufactured through the cold-bonding pelletization of two fly ashes differing in their physical and chemical properties. Moreover, one type of the LWAs was surface treated by water glass. The produced fly ash aggregates were then examined by means of ESEM micrograph, EDX spectrum, and XRD pattern to resolve the microstructural and the mineralogical characteristics of the LWAs. The findings of the study revealed that the fly ash with higher specific surface and with lower CaO content yielded higher strength LWAs. Furthermore, the surface treatment with water glass provided a marked increase in the aggregate strength and a reduction in the water absorption. The LWCs made with such LWAs had a compressive strength of as high as 60 MPa.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2006.05.038