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author:

Zheng, Y. (Zheng, Y..) [1] | Rao, F. (Rao, F..) [2] | Tian, X. (Tian, X..) [3] | Lin, S. (Lin, S..) [4]

Indexed by:

Scopus

Abstract:

The present work studies gel evolution and microstructure of geopolymers synthesized with volcanic ash (VA) and blast furnace slag (BFS). The synthesis parameters such as BFS proportions on geopolymer formation were investigated. Gel evolution and microstructure of the geopolymers were studied by FTIR, X-ray diffraction (XRD), 29Si NMR spectroscopy and scanning electron microscopy measurements. Silicate gels (N–S–H) were mainly formed in VA-based geopolymers of low compressive strength (14.07 MPa). While with VA and BFS each account for 50%, VA-BFS–based geopolymers possessed a compressive strength of 55.6 MPa, as well as the homogeneous C–(A)–S–H and N–A–S–H gels were formed. The C–(A)–S–H and N–A–S–H gels show synergistic effects on the mechanical property of the geopolymers. This work provides a clue for the synthesis of geopolymers with superior mechanical properties in areas of architecture. Graphical Abstract: Detailed characterization gel evolution and microstructure of geopolymers synthesized with volcanic ash (VA) and blast furnace slag (BFS) were studied. Silicate gels (N–S–H) were mainly formed in VA-based geopolymers of low compressive strength (14.07 MPa). When VA and BFS each account for 50%, VA-BFS–based geopolymers possessed a compressive strength of 55.6 MPa, as well as the homogeneous C–(A)–S–H and N–A–S–H gels formed. Synthesis protocol for VA-BFS–based geopolymers. [Figure not available: see fulltext.] © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Keyword:

Blast furnace slag Compressive strength Gel evolution Geopolymer Volcanic ash

Community:

  • [ 1 ] [Zheng, Y.]School of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
  • [ 2 ] [Rao, F.]School of Materials Science and Engineering, Fuzhou University, Fujian, Fuzhou, 350108, China
  • [ 3 ] [Rao, F.]Zijin School of Geology and Mining, Fuzhou University, Fujian, Fuzhou, 350108, China
  • [ 4 ] [Tian, X.]School of Civil Engineering, Changsha University of Science and Technology, Changsha, 410114, China
  • [ 5 ] [Lin, S.]Zijin School of Geology and Mining, Fuzhou University, Fujian, Fuzhou, 350108, China

Reprint 's Address:

  • [Rao, F.]School of Materials Science and Engineering, Fujian, China

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Source :

Environmental Science and Pollution Research

ISSN: 0944-1344

Year: 2023

Issue: 10

Volume: 30

Page: 26244-26255

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JCR@2023

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JCR@2023

ESI HC Threshold:33

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 2

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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