Mechanical behavior of strain-hardening cement-based composites (SHCC) subjected to torsional loading and to combined torsional and axial loading

Figueiredo, Tathiana Caram S.P.; Curosu, Iurie; Gonzáles, G. L. G.; Hering, Martin; Silva, Flávio de Andrade; Curbach, Manfred; Mechtcherine, Viktor

doi:10.1016/j.matdes.2020.109371

Cited by 22 publications

(4 citation statements)

References 33 publications

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“…In terms of strength, however, the high‐density PE fibers outperformed their PVA counterparts. In a separate effort, Figueiredo et al 39 studied strain‐hardening cement‐based composites under the combined effect of torsional and axial loads. Two types of fibers, i.e., ultra‐high molecular weight PE and PVA fibers, were investigated.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐high performance concrete under direct tension: Investigation of a hybrid of steel and synthetic fibers

Karim,

Shafei

2023

Structural Concrete

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Ultra‐high performance concrete (UHPC) offers superior tensile properties in comparison to normal and high‐strength concrete. This is known to largely depend on the fibers included in the UHPC mixtures. Among the available types of fiber, steel fibers have been commonly used in the current practice. However, given the price and availability issues associated with steel fibers, there has been growing interest in benefiting from synthetic fibers in UHPC. This was the motivation for the current study to investigate the potential of five synthetic fibers by evaluating how the tensile properties of the UHPC mixtures made with a hybrid of steel and synthetic fibers are influenced under direct tension. The synthetic fibers of choice consisted of nylon, polypropylene, polyvinyl alcohol, alkali‐resistant glass, and carbon fibers. By using a dog bone test setup, the main tensile properties of the developed mixtures (i.e., direct tensile strength, elastic modulus, and stress–strain relationship) were systematically determined. The results extracted from direct tension tests were then further processed in conjunction with digital image correlation analyses to investigate the formation and propagation of cracks, as well as the post‐cracking response. The original findings reported from this study are expected to pave the way to broaden the fiber types that can be considered for the structural applications of UHPC, especially where high tensile stresses/strains are anticipated.

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Section: Introductionmentioning

confidence: 99%

Ultra‐high performance concrete under direct tension: Investigation of a hybrid of steel and synthetic fibers

Karim,

Shafei

2023

Structural Concrete

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“…The tensile strain of ECCs reaches at least 2%, which is more than 200 times that of ordinary concrete [ 13 , 14 ]. ECCs exhibit strain hardening and saturation cracking under increasing tensile forces, with crack widths typically ranging from 0.05 mm~0.1 mm [ 15 , 16 , 17 , 18 ]. Studies have shown that the permeability stabilizes within 3–4 days when the ECC fracture width is <60 μm, and takes 7–10 days, or even longer, to stabilize when the fracture width is >100 μm.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cementitious Capillary Crystalline Waterproofing Materials on the Mechanical and Impermeability Properties of Engineered Cementitious Composites with Microscopic Analysis

Yan

Zhao

et al. 2023

Polymers

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Building structures are prone to cracking, leakage, and corrosion under complex loads and harsh marine environments, which seriously affect their durability performance. To design cementitious composites with excellent mechanical and impermeability properties, Engineered Cementitious Composites (ECCs) doped with ultrahigh molecular weight polyethylene short-cut fibers (PE-ECCs) were used as the reference group. Different types (XYPEX-type from Canada, SY1000-type from China) and doses (0%, 0.5%, 1.0%, 1.5%, 2.0%) of Cementitious Capillary Crystalline Waterproofing materials (CCCWs) were incorporated. The effect of CCCWs on the mechanical and impermeability properties of PE-ECCs, and the microscopic changes, were investigated to determine the best type of CCCW to use and the best amount of doping. The results showed that with increasing the CCCW dosage, the effects of both CCCWs on the mechanical and impermeability properties of PE-ECC increased and then decreased, and that the best mechanical and impermeability properties of PE-ECC were achieved when the CCCW dosing was 1.0%. The mechanical properties of the PE-ECC were more obviously improved by XYPEX-type CCCW, with a compressive strength of 53.8 MPa, flexural strength of 11.8 MPa, an ultimate tensile stress of 5.56 MPa, and an ultimate tensile strain of 7.53 MPa, which were 37.95%, 53.25%, 14.17%, and 21.65% higher than those of the reference group, respectively. The effects of the two CCCWs on impermeability were comparable. CCCW-PE-ECC(X1.0%) and CCCW-PE-ECC(S1.0%) showed the smallest permeation heights, 2.6 mm and 2.8 mm, respectively. The chloride ion diffusion coefficients of CCCW-PE-ECC(X1.0%) and CCCW-PE-ECC(S1.0%) exhibited the smallest values, 0.15 × 10−12 m2/s and 0.10 × 10−12 m2/s, respectively. Micromorphological tests showed that the particle size of the XYPEX-type CCCW was finer, and the intensity of the diffraction peaks of C-S-H and CaCO3 of PE-ECC increased after doping with two suitable doping amounts of CCCW. The pore structure was improved, the surface of the matrix was smoother, and the degree of erosion of hydration products on the fiber surface was reduced after chloride ion penetration. XYPEX-type CCCW demonstrated a more obvious improvement in the PE-ECC pore structure.

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“…Compared with steel fibers, non-metallic fibers are corrosion resistant. Non-metallic fibers [10][11][12] have been used to reinforce cementitious material, including carbon fiber, 13 basalt fiber, [14][15][16] polyethylene terephthalate (PET) fiber 17 , polyvinyl alcohol (PVA) fiber, 18,19 polypropylene (PP) fiber 20,21 and polyoxymethylene (POM) fiber. 22,23 POM fiber has plentiful ether bonds and has a good compatibility with cement.…”

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confidence: 99%

Experimental study on mechanical behaviors of polyoxymethylene woven tube-reinforced cementitious composites

Wei,

Yang,

Feng

et al. 2023

Textile Research Journal

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This paper aimed to investigate the mechanical performances of woven tube-reinforced cementitious composites. Polyoxymethylene fibers were used to form woven tubes. The integrated woven tube and splicing woven tube-reinforced cementitious composites were prepared with different textile structures. The compressive and bending properties of woven tube-reinforced cementitious composites were experimentally characterized through compression and bending tests, and the testing processes were recorded by camera. The results showed that both the integrated woven tube and the splicing woven tube could apparently enhance the compressive and bending properties. The compressive and bending strengths of the integrated woven tube-reinforced cementitious composite could reach 44 and 21 MPa, respectively. Due to low splicing strength, the splicing woven tube-reinforced cementitious composite was likely to split, which led to the disassembly. The integrated woven tube-reinforced cementitious composite had higher compressive and bending strengths than the splicing woven tube-reinforced cementitious composite. Moreover, the integrated woven tube-reinforced cementitious composite exhibited better energy absorption ability and integrity after testing than the splicing woven tube-reinforced cementitious composite. The energy absorption of the integrated woven tube-reinforced cementitious composite could reach over 7 MJ/m3 during compression. Under compression, the splicing woven tube-reinforced cementitious composite and pure cement only had one compressive peak stress, which was caused by the damage to the cement, whereas the integrated woven tube-reinforced cementitious composite had two compressive peak stresses: the second compressive peak stress was caused by fiber breakage. In general, the integrated woven tube is more suitable for reinforcing cement than the splicing woven tube.

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Mechanical behavior of strain-hardening cement-based composites (SHCC) subjected to torsional loading and to combined torsional and axial loading

Cited by 22 publications

References 33 publications

Ultra‐high performance concrete under direct tension: Investigation of a hybrid of steel and synthetic fibers

Ultra‐high performance concrete under direct tension: Investigation of a hybrid of steel and synthetic fibers

Effect of Cementitious Capillary Crystalline Waterproofing Materials on the Mechanical and Impermeability Properties of Engineered Cementitious Composites with Microscopic Analysis

Experimental study on mechanical behaviors of polyoxymethylene woven tube-reinforced cementitious composites

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