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Circular Economy
The Bending and Compression test was performed applying the UNE-EN 1015-11 and the results are showed in table 1:
Sample
HS HR
AGE
7 days
14 days
28 days
B (MPa)
2.3 4.3
C (MPa)
12.5
B (MPa)
5.5
C (MPa)
14.2
B (MPa)
7.4 6.9
C (MPa)
16.7 19.7
NF
2.3
14.5
5.9
17.8
8.5
19.3
LS
4.7
12.5
6.2
17.2
6.5
15.9
12.3
Table 1. Bending and compression test
4.4
17.1
The results show that the sample without fiber shows better results for both tests; however, the behaviorofthesampleswithabacafiberweremoredifficulttosplitforperformingcompression and flexural test, because there was a bonding action between the fibers and the cementitious composites. At day 28 the treatment with LS shows the poorest results, on the other hand the one with HS increases its strength. According to these results. None of the treatments were the appropriated in order to gain resistance; however, the visible behavior was that the treatment with NaOH was the hardest one to split its parts for compression test.
4. Acknowledgment
Special thanks to HOLCIM ECUADOR for materials, laboratory and equipment for
the development of this research and CONSTRULADESA for laboratory tests.
5. References
Ferreira,SauloRochaetal.2018.“InfluenceofNaturalFibersCharacteristicsontheInterface Mechanicswith Cement Based Matrices.” Composites Part B: Engineering 140(September 2017): 183–96. https://doi.org/10.1016/j.compositesb.2017.12.016.
Ferreira,SauloRocha,FláviodeAndradeSilva,PauloRobertoLopesLima,andRomildo DiasToledoFilho. 2017. “Effect of Hornification on the Structure, Tensile Behavior and Fiber Matrix Bond of Sisal, Jute and Curauá Fiber Cement Based Composite Systems.” Construction and Building Materials 139: 551–61. http://dx.doi.org/10.1016/j.conbuildmat.2016.10.004.
Jiang,Deminetal.2018.“EffectofLeafFiberModificationMethodsonMechanicaland Heat-Insulating PropertiesofLeafFiberCement-BasedCompositeMaterials.”Journal ofBuildingEngineering 19(May): 573–83.
Silva, Everton Jose da et al. 2017. “A New Treatment for Coconut Fibers to Improve the Properties of Cement- BasedComposites–CombinedEffectofNaturalLatex/Pozzolanic Materials.”SustainableMaterialsand Technologies 12(January 2016): 44–51. http://dx.doi.org/10.1016/j.susmat.2017.04.003.
Zukowski,Bartosz,FláviodeAndradeSilva,andRomildoDiasToledoFilho.2018.“Design ofStrain Hardening Cement-Based Composites with Alkali Treated Natural Curauá Fiber.” Cement and Concrete Composites 89: 150–59.
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