A novel pull-out device used to study the influence of pressure during processing of cement-based material reinforced with coir

Lecompte, T.; Perrot, Arnaud; Subrianto, Agus; Duigou, Antoine Le; Ausias, Gilles

doi:10.1016/j.conbuildmat.2014.12.119

Cited by 40 publications

(17 citation statements)

References 57 publications

(76 reference statements)

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“…In Region 4, on the other hand, after the first debonding of the fiber, a sharp drop in force occurs and some peaks can be observed after a certain slip. A similar behavior has been observed in other studies [53,54]; this behavior is not directly related to the fiber treatment. The load peaks can be attributed to the increase in the cross-sectional area of the natural fiber along the length, which leads to the development of larger stresses owing to the contribution of mechanical anchoring.…”

Section: Pullout Testsupporting

confidence: 90%

Effect of Surface Biopolymeric Treatment on Sisal Fiber Properties and Fiber-Cement Bond

Lima

Santos

Camilloto

et al. 2017

Journal of Engineered Fibers and Fabrics

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Sisal fiber, available in various semi-arid regions around the world, is the most studied natural fiber for the reinforcement of polymeric and cement-based composites. However, to improve the fiber-matrix interaction and to reduce the hydrophilicity of the fiber, it is necessary to establish surface treatments that employ sustainable materials, unlike conventional surface treatments. In this work, sisal fibers were coated separately with cellulose acetate, hydrophobic starch, and cassava starch biopolymers in order to verify the possibility of reducing the water absorption capacity of the fiber by the use of a biodegradable resin. A combination of Fourier transform infrared spectroscopy, scanning electron microscopy, and water absorption and tensile tests was used to investigate the effects of the surface treatments on the sisal fiber properties. Pullout tests of sisal fibers with embedded lengths of 20 mm and 40 mm were performed to determine the influence of the treatments on the bond stress with cement mortar. Composites with 4 vol % short fiber were produced and tested for flexion. The study results indicated that all treatments reduced the mechanical properties of the fiber; however, the layer of the cellulose acetate biopolymer film formed on the fiber surface was effective in reducing the fiber hydrophilicity. Experimental tests on the composites revealed that the cellulose acetate treatment reduced the bond stress and, to a lesser degree, the flexural toughness of the composite, despite the increase in flexural strength.

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Section: Pullout Testsupporting

confidence: 90%

Effect of Surface Biopolymeric Treatment on Sisal Fiber Properties and Fiber-Cement Bond

Lima

Santos

Camilloto

et al. 2017

Journal of Engineered Fibers and Fabrics

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“…Coir is a low cost, versatile, renewable and biodegradable lignocelullosic fibre obtained from the coconut palm (Cocos nucifera), which is very abundant in coastal areas of tropical countries and plays an important role in the economy of these regions [2,[7][8]. Apart from its conventional applications (e.g., cordage, cushions, sacking, floor-furnishing [7], mats, carpets and seat covers [9]), coir has recently been used as a reinforcement in cement, concrete, particleboard and polymer composites due to their valuable properties such as renewability, resilience, rigidity, toughness, elongation at break and weather resistance [7].…”

Section: Introductionmentioning

confidence: 99%

Cold-Pressed Hybrid Composites Reinforced With Coir Fibres and Cement Particles: A Statistical Approach

Coura¹,

Oliveira²,

Ferreira³

et al. 2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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The mechanical properties of polyester hybrid composites reinforced with treated and untreated coir fibres and 15 wt.% of cement microparticles at different locations were investigated in this work. A Full Factorial Design (2 1 3 1 ) was conducted to identify the effect of the chemical treatment of coir fibres and location of cement inclusions on the tensile (and flexural) strength and modulus. In general, the alkaline treatment led to increased tensile properties and flexural strength compared to untreated fibre composites. The inclusion of cement particles, especially added throughout the whole sample, increased the tensile and flexural strength and tensile modulus of untreated coir fibre composites. A significant increase in flexural modulus was observed only in composites made with treated coir fibres along with the incorporation of cement particles in the whole sample.

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“…The influential works of Eligehausen and Sawade [12], Bažant et al [13], Ožbolt et al [14], Karihaloo [15] emphasized the structural size effect on the pullout test and its influence on the energy dissipated in the cracking process. Most recent advances are related to the possibility of testing the coupling between FRP composites and concrete [16,17]. Hereafter, the attention will be focused on the reported experiments from Dejori [18], Thenier and Hofstetter [19] for the 2D case, whereas the work by Gasser and Holzapfel [20], Areias and Belytschko [21] will be considered for the 3D case.…”

Section: Introductionmentioning

confidence: 99%

“…with the residuals R 1,h , R 2,h defined in (17). Back-substituting in the set of equations of the problem, the final set of equations is:…”

Section: Osgs Stabilizationmentioning

confidence: 99%

High-fidelity prediction of crack formation in 2D and 3D pullout tests

Benedetti

Cervera

Chiumenti

2016

Computers & Structures

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This paper presents the 2D and 3D numerical analysis of pullout tests on steel anchorages in concrete blocks using standard and mixed finite elements. A novel (stabilized) mixed formulation in the variables of total strain ε and displacements u is introduced to overcome the intrinsic deficiencies of the standard displacement-based one in the context of localization of strains, such as mesh dependency. The quasi-brittle behaviour of concrete is described through an elastoplastic constitutive law with a local Rankine yielding criterion. The proposed formulation is shown to be a reliable and accurate tool, sensitive to the physical parameters of the pullout tests, but objective with respect to the adopted FE mesh. Furthermore, the mixed ε/u finite element is able to capture the correct failure mechanism with relatively coarse discretizations. At the same time, the spurious behavior of the standard formulation is not alleviated by mesh-refinement.

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A novel pull-out device used to study the influence of pressure during processing of cement-based material reinforced with coir

Cited by 40 publications

References 57 publications

Effect of Surface Biopolymeric Treatment on Sisal Fiber Properties and Fiber-Cement Bond

Effect of Surface Biopolymeric Treatment on Sisal Fiber Properties and Fiber-Cement Bond

Cold-Pressed Hybrid Composites Reinforced With Coir Fibres and Cement Particles: A Statistical Approach

High-fidelity prediction of crack formation in 2D and 3D pullout tests

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