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Articles • Matéria (Rio J.) 27 (4) • 2022 • https://doi.org/10.1590/1517-7076-RMAT-2022-0181 copy

On the mechanical properties and crack pattern analysis of a strain-hardening cement-based composite reinforced by natural sisal fibers

Authorship SCIMAGO INSTITUTIONS RANKINGS

SPECIMEN	FIRST-CRACK TENSILE STRENGTH (MPa)	ULTIMATE TENSILE STRENGTH(MPa)	STRAIN-TO-FAILURE(%)	YOUNG'S MODULUS(GPa)
SPEC 1	4.8	13.9	1.6	11.0
SPEC 2	4.5	9.9	1.0	23.0
SPEC 3	3.2	10.7	1.4	17.6
SPEC 4	3.2	10.8	1.6	17.9
SPEC 5	4.2	12.2	1.6	23.8
SPEC 6	3.4	12.3	1.8	11.2
SPEC 7	4.3	14.0	1.9	27.8
Mean ± SD	3.9 ± 0.6	12.0 ± 1.5	1.6 ± 0.3	18.8 ± 5.8

REFERENCES	NATURAL FIBERS BASE (kind)	NUMBER OF FIBER LAYERS(unity)	FIBERVOLUMEFRACTION (%)	ULTIMATE TENSILE STRENGTH (MPa)	ULTIMATE TENSILE STRENGTH VARIATION(%)	STRAIN-TO-FAILURE mm/mm	STRAINVARIATION(%)
Present work	Sisal	3	5.0	12.0	–	0.016	–
SILVA et al. [³¹[31] SILVA, F.A., MOBASHER, B., FILHO, R.D.T., “Cracking mechanisms in durable sisal fiber reinforced cement composites”, Cement and Concrete Composites, v. 31, n. 10, pp. 721–730, 2009. doi: http://dx.doi.org/10.1016/j.cemconcomp.2009.07.004. https://doi.org/doi: http://dx.doi.org/1... ]	Sisal	5	10.0	12.0	0	0.015	6.3 (lower)
SOUZA et al. [¹⁹[19] SOUZA, L.O., SOUZA, L.M.S., SILVA, F.A., “Mechanics of natural curauá textile-reinforced concrete”, Magazine of Concrete Research, v. 73, n. 3, pp. 135–146, 2021. doi: http://dx.doi.org/10.1680/jmacr.18.00473. https://doi.org/doi: http://dx.doi.org/1... ]	Curauá	1	4.0	6.3	47.5 (lower)	0.012	25.0 (lower)
	Curauá	3	7.0	9.7	19.2 (lower)	0.014	12.5 (lower)
	Curauá	5	8.5	14.7	22.5 (higher)	0.016	0
TEIXEIRA and SILVA [³²[32] TEIXEIRA, F.P., SILVA, F.A., “On the use of natural curauá reinforced cement based composites for structural applications”, Cement and Concrete Composites, v. 114, pp. 103775, 2020. doi: http://dx.doi.org/10.1016/j.cemconcomp.2020.103775. https://doi.org/doi: http://dx.doi.org/1... ]	Curauá	3	5.0	12.8	6.7 (higher)	0.027	68.8 (higher)
SILVA JUNIOR et al. [²⁵[25] SILVA JUNIOR, I.B., SOUZA, L.M.S., SILVA, F.A., “Creep of pre-cracked sisal fiber reinforced cement based composites”, Construction & Building Materials, v. 293, pp. 123511, 2021. doi: http://dx.doi.org/10.1016/j.conbuildmat.2021.123511. https://doi.org/doi: http://dx.doi.org/1... ]	Sisal	3	6.0	10.2	15.0 (lower)	0.015	6.3 (lower)

SPECIMEN	DIC CRACK ANALYSIS
SPECIMEN	NUMBER OF CRACKS (unit)	MEAN CRACK WIDTH(µm)	MEAN CRACK SPACING(mm)
SPEC 5	9	288 ± 137	20.0
SPEC 6	9	352 ± 167	20.0
SPEC 7	5	508 ± 75	33.3

SPECIMEN	POSITION(end of)	STRESS(MPa)	STRAIN BY LVDTS(%)	STRAIN BY DIC(%)	STRAIN RATIO(DIC/LVDTs)	MEAN STRAIN RATIO
SPEC 5	Stage I	4.2	0.020	0.015	0.77	0.84 ± 0.07
	Stage II	8.3	0.832	0.773	0.93
	Stage III	12.2	1.567	1.317	0.84
SPEC 6	Stage I	3.4	0.072	0.056	0.79	0.84 ± 0.04
	Stage II	6.7	0.713	0.614	0.86
	Stage III	12.3	1.757	1.550	0.88
SPEC 7	Stage I	4.3	0.040	0.033	0.83	0.83 ± 0.02
	Stage II	8.5	0.840	0.715	0.85
	Stage III	14.0	1.888	1.527	0.81

Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro, em cooperação com a Associação Brasileira do Hidrogênio, ABH2 Av. Moniz Aragão, 207, 21941-594, Rio de Janeiro, RJ, Brasil, Tel: +55 (21) 3938-8791 - Rio de Janeiro - RJ - Brazil
E-mail: revmateria@gmail.com

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