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MECHANICAL PROPERTIES OF CEMENT MORTAR WITH GRAPHENE OXIDE

Małgorzata KRYSTEK

Małgorzata KRYSTEK

Faculty of Civil Engineering, The Silesian University of TechnologyGliwice, Poland
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KRYSTEK, Małgorzata
  
20 mag 2019
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Categoria dell'articolo: research-article
Pubblicato online: 20 mag 2019
Pagine: 91 - 96
Ricevuto: 30 lug 2018
Accettato: 11 feb 2019
DOI: https://doi.org/10.21307/acee-2019-008
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© 2019 Małgorzata KRYSTEK; published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Results of the sand sieve analysis
Results of the sand sieve analysis

Figure 2.

Results of compression tests conducted on 60×80 mm cylindrical specimens. a) The variability of compressive strength in time [26, 27] b) Plain mortar sample and c) cement-GO sample after compression test at the age of 14 days [26]
Results of compression tests conducted on 60×80 mm cylindrical specimens. a) The variability of compressive strength in time [26, 27] b) Plain mortar sample and c) cement-GO sample after compression test at the age of 14 days [26]

Figure 3.

Results of compression tests conducted on 60 x 120 mm cylindrical specimens. a) Stress-strain curves and b) variability of Young’s modulus values under increasing load [27]
Results of compression tests conducted on 60 x 120 mm cylindrical specimens. a) Stress-strain curves and b) variability of Young’s modulus values under increasing load [27]

Results of the uniaxial cylindrical compressive strength and Young’s modulus tests at the age of 28 days [27]

Sample Parameters
Force [kN] Strength [MPa] Average strength [MPa] (increase) Young’s modulus [GPa] Average Young’s modulus value [GPa] (increase)
R 88.65 31.25 32.12 (0%) 30.61 30.10 (0%)
95.69 33.84 28.74
87.20 30.74 27.16
101.12 35.76 32.75
81.74 28.91 31.24
GO0.03 118.08 41.78 41.18 (28%) 31.52 31.90 (6%)
113.10 40.02 30.63
115.02 40.70 30.43
120.45 42.62 33.23
115.30 40.78 33.69

Results of the flexural and cubic compressive strength tests at the age of 28 days [26]

Sample Parameters
Flexural strength Compressive strength
Force [kN] Strength [MPa] Average strength [MPa] (increase) Force [kN] Strength [MPa] Average strength [MPa] (increase)
R 1.78 4.17 4.00 (0%) 64.55 40.34 39.90 (0%)
60.94 38.08
1.75 4.10 62.10 38.81
64.91 40.57
1.59 3.73 65.71 41.06
64.84 40.52
GO 0.03 1.74 4.07 4.52 (13%) 80.81 50.50 49.00 (23%)
79.94 49.96
2.23 5.22 69.80 43.65
79.92 49.94
1.82 4.26 80.21 50.13
79.69 49.80

Chemical and physical properties of cement

Average values
Loss on ignition [%] 2.99
Insoluble residue [%] 0.81
SO3 content [%] 3.20
Cl- content [%] 0.063
Na2O content [%] 0.75
Start of setting time [min] 217
Compressive strength after 2 days [MPa] 26.5
Compressive strength after 28 days [MPa] 51.4
Stability of volume [mm] 0.80
Specific surface area [cm2/g] 3416

Composition of fabricated cement mortars

Sample Components
Cement [g] Water for GO dispersion [g] Remaining water [g] Sand [g] Graphene oxide [g]
R 3400 0 1700 10200 0
GO0.03 3400 222 1478 10200 1.02
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