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Residual fly ash from pyrometallurgical processes as a partial replacement for Portland cement in mortars: a study of structural evolution and determination of compressive strength

J. C. Juarez-Tapia
J. C. Juarez-Tapia
, 
H. García-Ortiz
H. García-Ortiz
, 
M. Pérez-Labra
M. Pérez-Labra
, 
J. A. Romero-Serrano
J. A. Romero-Serrano
, 
M. Reyes-Pérez
M. Reyes-Pérez
, 
A. Hernández-Ramirez
A. Hernández-Ramirez
, 
V. Acosta-Sanchez
V. Acosta-Sanchez
, 
A.M. Teja-Ruiz
A.M. Teja-Ruiz
 and 
I.A. Reyes-Dominguez
I.A. Reyes-Dominguez
   | Apr 02, 2024
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Published Online: Apr 02, 2024
Page range: 120 - 131
Received: Jan 23, 2024
Accepted: Mar 01, 2024
DOI: https://doi.org/10.2478/msp-2023-0050
Keywords
© 2023 J. C. Juarez-Tapia et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Fig. 1.

X-ray diffraction diffractogram for residual fly ash powders
X-ray diffraction diffractogram for residual fly ash powders

Fig. 2.

(a) Backscattered electron (BSE) image of typical residual fly ash spheres, (b) elemental spectrum (EDS), (c) particle size distribution
(a) Backscattered electron (BSE) image of typical residual fly ash spheres, (b) elemental spectrum (EDS), (c) particle size distribution

Fig. 3.

X-ray diffraction diffractogram for Portland cement CPC-30R
X-ray diffraction diffractogram for Portland cement CPC-30R

Fig. 4.

(a) Backscattered electron (BSE) image of Portland cement CPC-30R, (b) elemental spectrum (EDS), (c) particle size distribution
(a) Backscattered electron (BSE) image of Portland cement CPC-30R, (b) elemental spectrum (EDS), (c) particle size distribution

Fig. 5.

X-ray diffraction diffractogram for sand
X-ray diffraction diffractogram for sand

Fig. 6.

(a) Back-scattered electron (BSE) image of sand; (b) Elemental spectrum (EDS)
(a) Back-scattered electron (BSE) image of sand; (b) Elemental spectrum (EDS)

Fig. 7.

X-ray diffraction diffractograms for standard mortar mixes (without Portland cement substitution) at 3, 7, and 14 days of curing time
X-ray diffraction diffractograms for standard mortar mixes (without Portland cement substitution) at 3, 7, and 14 days of curing time

Fig. 8.

X-ray diffraction diffractograms for the mortar mixtures (with Portland cement substitution of 10% residual fly ash) at 3, 7, 14 and 28 days of curing time
X-ray diffraction diffractograms for the mortar mixtures (with Portland cement substitution of 10% residual fly ash) at 3, 7, 14 and 28 days of curing time

Fig. 9.

X-ray diffraction diffractograms for the mortar mixtures (with Portland cement substitution of 15% residual fly ash) at 3, 7, 14, and 28 days of curing time
X-ray diffraction diffractograms for the mortar mixtures (with Portland cement substitution of 15% residual fly ash) at 3, 7, 14, and 28 days of curing time

Fig. 10.

SEM micrograph detail of: (a,b) samples of mortars substituting Portland cement for 0% residual fly ash; (c, d) samples of mortars substituting Portland cement for 10% residual fly ash; (e, f) samples of mortars substituting Portland cement for 15% residual fly ash
SEM micrograph detail of: (a,b) samples of mortars substituting Portland cement for 0% residual fly ash; (c, d) samples of mortars substituting Portland cement for 10% residual fly ash; (e, f) samples of mortars substituting Portland cement for 15% residual fly ash

Fig. 11.

(a) Particles coated with hydration products; (b) smooth-surfaced particles; (c) particles with evidence of attack on their surface
(a) Particles coated with hydration products; (b) smooth-surfaced particles; (c) particles with evidence of attack on their surface

Fig. 12.

Compressive strength (sc) of mortar samples with 0%, 10%, and 15% residual fly ash at 3, 7, 14, and 28 days
Compressive strength (sc) of mortar samples with 0%, 10%, and 15% residual fly ash at 3, 7, 14, and 28 days

Physical properties of fly ash and Portland cement

Materials Median particle size (μm) Specific Gravity Passing 45 μm sieve (%) Blaine fineness (m2/kg)
Portland cement (CPC-30R) 5.67 3.10 98 348
Fly ash 13.07 2.02 79 302
eISSN:
2083-134X
Language:
English
Publication timeframe:
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Journal Subjects:
Materials Sciences, other, Nanomaterials, Functional and Smart Materials, Materials Characterization and Properties
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