Estimating the shear strength of sisal fibre reinforced concrete

Oriola, F.O.P.; Afolayan, J.O.; Sani, J.E.; Adamu, Yusuf

doi:10.4314/njt.v38i3.3

Cited by 4 publications

(7 citation statements)

References 10 publications

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“…Alkali treatment increases the tensile and flexural properties, as well as the durability of fibers [48]. It is also considered as an efficient and economic approach for the treatment of different natural fiber types [15,[49][50][51][52][53][54]. The depth of water was 4 ± 1 mm above the submerged face in order to maintain the supply of water to the specimens (Figure 2).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, this decrease would allow for the assumption that the addition of PA fibers up to 1.5% has a promising potential in the production of lightweight concrete [42]. It could be noted that the addition of the fibers did not considerably decrease density, as the values of mixes still fell within the range of concrete manufactured from granite chippings that is between 2300 and 2500 kg/m 3 [54].…”

Section: Densitymentioning

confidence: 99%

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The Effect of Adding Phragmites australis Fibers on the Properties of Concrete

et al. 2022

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Nowadays, the increasing demand for concrete is causing serious environmental impact including pollution and waste generation, rapid depletion of natural resources, and increased CO2 emission. Incorporating natural fibers in concrete can contribute toward environmental sustainability. This paper is concerned with the use of natural fibers obtained from the plant species Phragmites australis (PA). The plant is invasive, and rapidly grows abundantly along rivers and waterways, causing major ecological problems. This research is part of a wide range investigation on the use of natural fibers produced from the stem of PA plants in concrete. Using a machine, plant stems were crushed into fibers measuring 40 mm in length and 2 mm in width, and treated with 4% NaOH solution for 24 h. A total of four concrete mixes were prepared with varying additions of treated fibers, ranging from 0% to 1.5% (by volume) with water to cement ratio of 0.5% (by volume). Concrete specimens were tested at 3, 7, and 28 days. Testing included compressive strength, density, total water absorption, and capillary water absorption. The results show that incorporating PA natural fibers reduces the water absorption by total immersion and capillary action by up to 45%. Moreover, there is a negligible decrease in concrete density and strength when fibers were added. It is concluded that adding up to 1.5% natural PA fibers to concrete is a feasible strategy to produce an eco-friendly material which can be used in the production of sustainable building material with adequate mechanical and durability performance.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Densitymentioning

confidence: 99%

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The Effect of Adding Phragmites australis Fibers on the Properties of Concrete

et al. 2022

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“…For instance, let r and s be strength capacity and the loading effect of a system which are random variables, the goal of reliability analysis is to certify that r on no occasion is surpassed by s (Oriola et al, 2012). Therefore, r and s are generally functions of dissimilar parameters.…”

Section: First-order Reliability Methods (Form)mentioning

confidence: 99%

“…Assuming peak demand Ymax does not surpass the least capacity Xmin then a chances of failure of zero (pr = 0) and 100 percent reliability (r = 1) occurs. Under such condition, there is no overlapping of the two distributions (Oriola et al, 2012).…”

Section: = ( < 1) −mentioning

confidence: 99%

Reliability Evaluation of Compaction Water Content of Plantain Peel Ash Treated Lateritic Soil

Ishola¹,

Olawuyi²,

Yohanna³

et al. 2021

Nig. J. Technol. Dev.

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A first-order reliability method (FORM)was employed to assess the compaction water content, CWC (i.e optimum moisture content) of residual lateritic soil mixed with plantain peel ash (PPA) and compacted with British Standard Light (BSL)and British Standard Heavy (BSH)energies, for flexible pavement applications. A Multi-linear regression model was generated from values obtained via laboratory tests using Mini-tab R15 software, which served as a performance function that was applied for the analysis. Using the regression models for CWC, established distributions for the relevant soil factors, safety index (SI) was computed using CWC as a dependent factor and the soil factors Plantain Peel Ash (PPA); Plasticity Index (PI); Percentage File (PF); Specific Gravity (Gs) and Compactive Effort (CE)as self-determining factors). The results revealed that the safety index is sensitive to changeability in the soil factors. Outcome from the analysis show that Gs and CE are greatly affected by alteration in the coefficient of variation (COV), and so it is essential to control Gs and CE in lateritic soil–PPA mixes in road pavements. From the safety index values it reveals that PPA content has a minimal consequence as its value virtually remained constant at all COV used. Stochastically, lateritic soil mixed with PPA produces an acceptable safety index value of 1.0, as mentioned by the Nordic Committee on Building Regulation (NCBR) at 10% COV for BSH of compaction water content only. Therefore a more effective additive such as cement, lime, or bitumen is recommended for modeling CWC of lateritic soil-PPA mixes for road pavement at 10–100% series of COV. Keywords: Coefficient of variation; compaction water content; lateritic soil; plantain peel ash; reliability index

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Experimental Investigation on Shear Strength and Microstructure of Chemically Treated Sisal Fiber-Reinforced Concrete

Kahsay,

Demiss

2024

Advances in Civil Engineering

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The incorporation of sisal fiber into the concrete matrix reduces waste disposal, which has negative environmental impacts. The aim of this study was to perform an experimental investigation on shear strength and microstructure of chemically treated sisal fiber-reinforced concrete (SFRC). In order to accomplish the aim of the study, physical, shear, and mechanical properties of concrete reinforced with chemically treated sisal fiber have been performed. 0.50%, 1.00%, 1.25%, 1.50%, 1.75%, and 2.00% of sodium hydroxide (NaOH) and sulfuric acid (H2SO4) treated sisal fiber were used as an addition to the dry weight average with the help of the American Concrete Institute (ACI) mix design procedure. After the 7th and 28th days of curing, shear strength according to the ASTM D5379M standard and the mechanical properties of concrete have been conducted. For microstructural properties, scanning electron microscopy (SEM) and X-ray diffraction (XRD) were conducted after the concrete was cured for 28 days. Forty-six percent and 20% compressive strength enhancement at the 7th and 28th days of curing was compared to the control mix. Twenty-seven percent enhancement was recorded in the split tensile strength of 1.5% SFRC as compared to the control mix at 28 curing days. A shear strength of 1.5% SFRC was improved by 95% at the 7th curing days and 28% at the 28th curing days as compared to the control mix. As compared to conventional concrete, SFRC shows a denser microstructure. In addition to this, portlandite, quartz, calcium aluminum silicate, and C─S─H crystal are the available phases in the concrete matrix.

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Estimating the shear strength of sisal fibre reinforced concrete

Cited by 4 publications

References 10 publications

The Effect of Adding Phragmites australis Fibers on the Properties of Concrete

The Effect of Adding Phragmites australis Fibers on the Properties of Concrete

Reliability Evaluation of Compaction Water Content of Plantain Peel Ash Treated Lateritic Soil

Experimental Investigation on Shear Strength and Microstructure of Chemically Treated Sisal Fiber-Reinforced Concrete

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