MECHANICAL | Tensile strength (MPa) | 357 to 484 |
Strain to failure (%) | 3.3 to 14.7 | |
Modulus (GPa) | 8.7 to 19.5 | |
MORPHOLOGICAL | Fiber cross section area (mm2) | 0.02 to 0.03 |
Microfibers per cross section (unit) | 144 to 228 | |
Cell wall thickness (µm) | 2.60 to 2.95 |
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 | ||
---|---|---|---|
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 |