Sisal fiber reinforced hollow concrete blocks for structural applications: Testing and modeling

Izquierdo, Indara Soto; Izquierdo, Orieta Soto; Ramalho, Márcio Antonio; Taliercio, Alberto

doi:10.1016/j.conbuildmat.2017.06.072

Cited by 32 publications

(14 citation statements)

References 18 publications

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“…The density reduction varied between 10 and 13%. Similar trends have been observed in previous studies [22], [23] of soil blocks / bricks reinforced with other natural fibres. The addition of rice straw to adobe blocks causes the density of the composite to drop due to the low density of these inclusions.…”

Section: A Physical Propertysupporting

confidence: 91%

The Influence of Rice Straw on the Physical and Mechanical Properties of Banco, an Adobe Reinforced with Rice Straw

Labintan

Adadja

Gibigaye

et al. 2019

IJEAT

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Making adobes with the best mechanical properties for the construction of earthen housings is the overall goal of this work. Specifically, we study the influence of rice straw on the physical and mechanical properties of these adobes. The physical and mechanical properties (compressive and flexural strength) of adobes (mixture of sandy clay and rice straw) have been studied with different proportions of straw in the mixture. It is a question of determining the quantity of stalks of rice straw making it possible to optimize the mechanical performances of the composite. Various compositions have been considered with mass concentrations of rice straw ranging from 0 to 40% relative to the volume of clay sand to make 4×4×16cm prismatic specimens. The results obtained during physical and mechanical tests were presented in the form of a graph. The analysis of these data shows that the optimal addition of rice straw in the clay matrix is 25% for a better compromise between the compressive and tensile strengths. The improvement of the physical and mechanical properties of adobes is related to the good adhesion between the rice straw and the clay matrix, to the high tensile strength of the rice straw and finally to a good distribution of cracks in the composites

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Section: A Physical Propertysupporting

confidence: 91%

The Influence of Rice Straw on the Physical and Mechanical Properties of Banco, an Adobe Reinforced with Rice Straw

Labintan

Adadja

Gibigaye

et al. 2019

IJEAT

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“…Certainly, incorporation of fibers reduces concrete's density, raises its water absorption and void. The increase in voids generates more interface zone between sisal and the concrete constituent's interfaces [32]. Consequently, SFRC has an increased number of permeable and micro crack regions than plain concrete, which further elucidate on the reduction in the compressive strength.…”

Section: Effect Of Shape On the Compressive Strength Of Sfrcmentioning

confidence: 96%

The Effect of Specimen Shape on the Mechanical Properties of Sisal Fiber-Reinforced Concrete

Okeola¹,

Abuodha²,

Mwero³

2018

TOCIEJ

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Introduction: Fiber reinforced concrete is becoming popular in improving the quasi-brittle failure of concrete. Natural fibers such as sisal holds great promise in this regard. It has amazing tensile strength and is renewable. This paper presents the result of an investigation carried out on the effect of sisal fiber on the compressive strength, Split tensile strength, failure mode and Poisson ratio of Sisal Fiber-Reinforced Concrete (SFRC). Methods: A mix proportion of 1:1.92:3.68 and w/c ratio of 0.47 for a target compressive strength of 35 MPa was used. Sisal fiber was added at percentages of 0.5%, 1.0%, 1.5%, and 2.0% by weight of cement. The effect of specimen shape on the compressive strength of sisal fiber-reinforced concrete (SFRC) was reported. The compressive strength of cube (150mm X 150mm) and cylinder (150mm diameter and 300mm height) specimen was determined at 7 and 28 days, while Split tensile strength and Poisson ratio were obtained using cylindrical specimen (150mm diameter and 300mm height). Results and Conclusion: The result shows that the addition of sisal fiber slightly reduces the compressive strength of concrete, increases its split tensile strength up to 47.167% of the control specimen, arrests crack propagation and reduces its Poisson ratio. The correlation between the compressive strength of cylindrical and cube specimen was established with a ratio ranging between 0.82 - 0.73. The difference in the compressive strength was found to increase with rise in the percentages of sisal fiber. Based on the ratio and mechanical properties, 1.0% sisal fiber content was recommended as the optimum for reinforcing concrete.

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“…A smeared approach was selected because in the experimental tests carried out with bending specimens and FRC blocks several cracks were formed in the most tensioned zones. In recent study [48] the numerical approach based on the 'smeared crack' material model has been used successfully to model sisal concrete elements. By fitting as much as possible the obtained experimental results (Figure 8), the fracture mode I parameters indicated in Table 9 were determined, where the meaning of the symbols are shown in Figure 13.…”

Section: Evaluation Of the Fracture Mode I Parameters Of Ssfrcmentioning

confidence: 99%

Short sisal fiber reinforced recycled concrete block for one-way precast concrete slabs

Lima

Barros

Roque

et al. 2018

Construction and Building Materials

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This work is dedicated to the assessment of the structural capacity of a new lightweight block for one-way precast concrete slabs made of short sisal fiber reinforced concrete (SSFRC) containing natural and recycled aggregate. Flexural tests were carried out on SSFRC block samples, as well as on ceramic and EPS blocks used commercially. Slab panels including SSFRC, ceramic and EPS blocks were tested under four point bending configuration to assess the benefits of the new SSFRC block in quasi-real slab conditions. The results of the tests indicated the influence of the sisal fibers and recycled aggregate on the physical and mechanical properties of the concrete and the best structural performance of the SSFRC blocks in relation to commercial solutions. The flexural behavior and cracking of slabs were presented and discussed. Numerical models were also developed to predict the nonlinear behavior of the SSFRC and to simulate the flexural behavior, crack initiation and propagation in the blocks. By adopting this numerical strategy, a parametric study was carried out to simulated new design of blocks and to demonstrate that the load carrying capacity at serviceability limit state conditions can be significantly increased with the thickness of SSFRC block.

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Sisal fiber reinforced hollow concrete blocks for structural applications: Testing and modeling

Cited by 32 publications

References 18 publications

The Influence of Rice Straw on the Physical and Mechanical Properties of Banco, an Adobe Reinforced with Rice Straw

The Influence of Rice Straw on the Physical and Mechanical Properties of Banco, an Adobe Reinforced with Rice Straw

The Effect of Specimen Shape on the Mechanical Properties of Sisal Fiber-Reinforced Concrete

Short sisal fiber reinforced recycled concrete block for one-way precast concrete slabs

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