The Compressive Strength and Microstructure of Alkali-Activated Binary Cements Developed by Combining Ceramic Sanitaryware with Fly Ash or Blast Furnace Slag
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Other documents of the author: Cosa, Juan; Soriano, Lourdes; Borrachero, Mª Victoria; Reig, Lucía; PAYÁ, JORDI; Monzó, José María
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comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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Title
The Compressive Strength and Microstructure of Alkali-Activated Binary Cements Developed by Combining Ceramic Sanitaryware with Fly Ash or Blast Furnace SlagAuthor (s)
Date
2018Publisher
MDPIISSN
2075-163XBibliographic citation
COSA, Juan, et al. The Compressive Strength and Microstructure of Alkali-Activated Binary Cements Developed by Combining Ceramic Sanitaryware with Fly Ash or Blast Furnace Slag. Minerals, 2018, vol. 8, no 8, p. 337.Type
info:eu-repo/semantics/articlePublisher version
https://www.mdpi.com/2075-163X/8/8/337Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
The properties of a binder developed by the alkali-activation of a single waste material can
improve when it is blended with different industrial by-products. This research aimed to investigate
the influence of blast ... [+]
The properties of a binder developed by the alkali-activation of a single waste material can
improve when it is blended with different industrial by-products. This research aimed to investigate
the influence of blast furnace slag (BFS) and fly ash (FA) (0–50 wt %) on the microstructure and
compressive strength of alkali-activated ceramic sanitaryware (CSW). 4 wt % Ca(OH)2 was added to
the CSW/FA blended samples and, given the high calcium content of BFS, the influence of BFS was
analyzed with and without adding Ca(OH)2. Mortars were used to assess the compressive strength
of the blended cements, and their microstructure was investigated in pastes by X-ray diffraction,
thermogravimetry, and field emission scanning electron microscopy. All the samples were cured
at 20 ◦C for 28 and 90 days and at 65 ◦C for 7 days. The results show that the partial replacement
of CSW with BFS or FA allowed CSW to be activated at 20 ◦C. The CSW/BFS systems exhibited
better mechanical properties than the CSW/FA blended mortars, so that maximum strength values of
54.3 MPa and 29.4 MPa were obtained in the samples prepared with 50 wt % BFS and FA, respectively,
cured at 20 ◦C for 90 days. [-]
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Minerals 2018, 8Investigation project
APLIGEO BIA2015-70107-RRights
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