Steel Fibres as a Partial Shear Reinforcement in Self-compacting Concrete

Praveen, K; Rao, S. Venkateswara

doi:10.1007/978-981-13-0362-3_74

Cited by 2 publications

(3 citation statements)

References 5 publications

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“…Grouping from recommended qualities indicate that Wum sand is best fit for structural bearing, with a compressive resistance reaching the previewed value that is 26.65 MPa from the notion of Ngugi et al, (2014) which says that various works need various qualities of sand. Use of good quality building sands improve both operational and lifecycle performance of buildings by reducing cost (Ngugi et al, 2014;Praveen, 2015). Ndop sand is best for finishing from the statement that sand used for plastering should have a uniform particle size, ranging from 0.15 mm to 2.36 mm, with no large or small particles (IS 1542: Sand for plaster) and Praveen, (2015) which outlines the following limits for different works; bricks: Fineness modulus of sand should be between 1.2 to 1.5 and silt contents should not be more than 4%; Plastering; Fineness modulus of sand should not be more than 1.5 and silt contents should not be more than 4%.…”

Section: Discussionmentioning

confidence: 99%

“…Concreting Works require coarse sand of fineness modulus between 2.5 to 3.5 and silt contents should not be more than 4%" (Praveen, 2015) and landscaping (Kumar and Singh, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Silt content should not be more than 4% for any use" (Praveen, 2015). Sand used for plastering should have a uniform particle size, ranging from 0.15 mm to 2.36 mm, with no large or small particles, (IS 1542).…”

Section: Introductionmentioning

confidence: 99%

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Physical-Mechanical Properties of Sand from Various Sandpits in the North West Region and Their Recommended Domains of Application

Mbuh,

Nsahlai,

Penka

et al. 2024

Preprint

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Sand is widely used in the Northwest Region of Cameroon and it is over 38% of the total aggregate quantity in concrete and the only aggregate in mortar, thus has a significant impact on their properties. The inability to make alternative sand choices for use in projects and the inability of contractors to attain 25 mega Pascal (MPa) compressive strength among others, call for concern, necessitating this study to classify the sands according to their physical-mechanical properties and suitability for various works. Based in Mezam, the study required identification tests for the sands. Wum, Mbengwi, Ndop, Chomba and Mbatu sands were studied. Concrete was formulated for 25 MPa strength and mortar on a ratio of 3:1:0.75 for sand, cement and water respectively, to assess the contribution of these sands in concrete and mortar and to find their specific qualities. Tests indicated that Wum sand was densest (specific gravity 2.548 t/m3) and Mbatu sand lightest (specific gravity 2.486 t/m3). Gradation showed that Wum sand had the largest grains (Mfs 2.93) while Mbatu sand had the finest (Mfs 2.62). Concrete was formulated with water-cement ratio of 0.56 for the sands and had 26.64, 24.4, 20.59, 21.66 and 17.33 MPa resistance respectively at 28-days of curing. The mortar gave 25.33, 20.62, 13.01, 19.17 and 15.99 MPa respectively for the sources after 14-days of curing cubes of 70 mm sides. These proved that Wum sand was best for structural uses and Ndop sand for light loads. Mbengwi and Chomba sands should be washed while Mbatu sand should at best be mixed with Wum sand.

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Section: Discussionmentioning

confidence: 99%

“…Concreting Works require coarse sand of fineness modulus between 2.5 to 3.5 and silt contents should not be more than 4%" (Praveen, 2015) and landscaping (Kumar and Singh, 2017).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Physical-Mechanical Properties of Sand from Various Sandpits in the North West Region and Their Recommended Domains of Application

Mbuh,

Nsahlai,

Penka

et al. 2024

Preprint

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Shear strength of steel fiber self-compacting concrete beams

Savaris

Laufer

2021

Semina: Tech. Ex.

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The use of self-compacting concrete has increased for several reasons over recent decades but, mainly due to its high fluidity, which dispenses of the need for concrete vibrators, ease of casting, higher quality and better compacting, allowing the production of slender pieces, with a higher reinforcement ratio. However, even self-compacting concrete exhibits brittle failure behavior and low tensile and shear strength, issues that can be mitigated with the use of steel fibers. Aiming to investigate the shear strength in self-compacting concrete beams with steel fibers, this study presents a database collected from 113 experimental tests in the literature. Using the Root Mean Square Error (RMSE) and the Collins’ Demerit Points Classification (DPC), five code-based equations and ten experimental based equations for the prediction of the shear capacity of SFRC beams were evaluated. The results show that, unlike concrete without the addition of fibers, increase in aggregate dimensions decreases the shear strength with the use of steel fibers in SCC beams. Additionally, the increase in fiber volume corresponds to an increase in concrete shear strength with a maximum compressive strength of 50 MPa. The results also demonstrate that the Root Mean Square Error (RMSE) is better for evaluating the precision but not the safety of the shear strength prediction equations, which are better determined by Collins’ Demerit Points Classification (DPC). Code-based equations for ultimate shear strength prediction of fiber reinforced concrete beams presented results with satisfactory safety and economy.

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Steel Fibres as a Partial Shear Reinforcement in Self-compacting Concrete

Cited by 2 publications

References 5 publications

Physical-Mechanical Properties of Sand from Various Sandpits in the North West Region and Their Recommended Domains of Application

Physical-Mechanical Properties of Sand from Various Sandpits in the North West Region and Their Recommended Domains of Application

Shear strength of steel fiber self-compacting concrete beams

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