Optimizing the compressive strength of concrete containing micro-silica, nano-silica, and polypropylene fibers using extreme vertices mixture design

Zahiri, Fatemeh; Eskandari‐Naddaf, Hamid

doi:10.1007/s11709-019-0518-6

Cited by 34 publications

(19 citation statements)

References 52 publications

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“…A stepwise approach known as RSM can be used to improve a given response or to meet a set of specifications. This process involves designing an experiment that fits to the requirements of the given specification [21][22][23][24][25]. This paper shows that the "Strength properties" depends on the response of "steel fibers" and "polypropylene fibers".…”

Section: Response Surface Methodsmentioning

confidence: 99%

Evaluation of Mechanical Performance of High Performance Hybrid Fiber Reinforced Concrete Containing Micro Silica

Prabath¹,

Ramadoss²

2022

cea

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In the extended use of concrete in military applications, runway pavements and infrastructures, concrete is subjected to heavy impact loads that vary both in velocity and intensity. The addition of fibers in high performance concrete (HPC) can overcome its shortcomings such as brittleness, high shrinkage and less resistance to impact and also improve the ductile behavior and energy absorption capacity. In this study, development on strengthening of HPC using steel and Polypropylene fibers was focused. Moreover, an inclusion of volume fractions of both steel and polypropylene fibers, leads to an increase in the mechanical properties of concrete matrix. The present study represents the adding steel and Polypropylene fibres at 0.5, 1.0, 1.5, and 0.25, 0.5, 1% by volume of concrete, respectively. A concrete mix has been designed to achieve the M60 grade concrete, mixes proportioned for FRC to determine the compressive strength, split tensile strength and flexural strength of high performance hybrid fiber reinforced concrete at 28 days. The experimental results showed that the use of hybrid fibers with 1.5% steel and 1% Polypropylene fiber in HPC concrete has improved the strength of the concrete by 36% and 25.1% HPC with single fibers. The statistical tool was formulated to predict the strength properties of fiber reinforced concrete (i.e., compressive, flexural and split tensile strengths). The response surface method (RSM) was used to analyze the data and develop a regression equation. RSM was able to predict the experimentally tested values within an acceptable range.

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Section: Response Surface Methodsmentioning

confidence: 99%

Evaluation of Mechanical Performance of High Performance Hybrid Fiber Reinforced Concrete Containing Micro Silica

Prabath¹,

Ramadoss²

2022

cea

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“…The observations fairly agreed with the previous literature that the influence of fibre inclusion on the compressive strength of concrete is not significant; conversely, the fibre inclusion may enhance the tensile strength of the concrete substantially. 10 Considering the tensile strength properties of the concrete mixture at the age of 7 and 28 days, the linear (X 1 ) and the quadratic X 2 1 À Á term of PVA fibre was more significant, and the p values were less than 0.005. While considering the influence of nano-Fe 2 O 3 , it was insignificant and the p value of the linear (X 2 ) and the quadratic X 2 1 À Á term of nano-Fe 2 O 3 was more than 0.005.…”

Section: Significance Of Process Variables Influencing Response -Lackmentioning

confidence: 99%

“…Therefore, it is very imperative to increase the compressive strength of the concrete, where the compressive tensile properties of the concrete are predominant for its application. 10 It has been documented that the introduction of nanomaterials either may be in the spherical materials form (includes nano-SiO 2 , nano-Al 2 O 3 , nano-TiO 2 , nano-Fe 2 O 3 , nano-ZnO etc.) or may be in the tube materials in the concrete densify the concrete by filling concrete pores, enhance the hydration process and significantly enhance the compressive strength of concrete.…”

Section: Introductionmentioning

confidence: 99%

A DOE approach to optimize the strength properties of concrete incorporated with different ratios of PVA fibre and nano-Fe₂O₃

Cibilakshmi¹,

Jegan²

2020

Advanced Composites Letters

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The purpose of this research is to optimize the fresh and strength properties of concrete with various incorporation ratios of polyvinyl alcohol (PVA) fibre and nano-Fe2O3 by design of experiment approach. Central composite design of response surface methodology was used to acquire the optimal composition of process variables, and the influence of process variable on the fresh and strength properties of concrete was also verified. A total of five responses ( Y Slump, f ck,7, f ck,28, f t,7 and f t,28) were considered in this study, and the factors and the level of each response was 2 and 3, respectively. Regression models for Y Slump, f ck,7, f ck,28, f t,7 and f t,28 were tested; the statistical significance of each process variable was assessed through analysis of variance and Pareto chart, and the obtained models were expressed in the form of second-order polynomial equation. The test results revealed that incorporation of PVA and high-reactive nano-Fe2O3 improved the strength of the concrete; however, the higher level incorporation exhibited unpronounced effect on the strength enhancement. The incorporation of nano-Fe2O3 enhanced the compressive strength to the maximum of 7.44%. The high-reactive nano-Fe2O3 accelerated the hydration process of concrete and enhanced the particle packing density of the concrete by filling the micropores. However, the higher incorporation of nano-Fe2O3 leached out the surplus silica from the concrete and reduced the strength enhancement of the cement composite matrix. The regression analysis results revealed that the most significant and contribution factor for f ck,7 and f ck,28 is the linear term nano-Fe2O3 ( X 2), 99.81% contribution, and for f t,7 and f t,28 is the linear term PVA ( X 1), 75.75% contribution. Pareto chart and surface plot analysis also revealed the same as above. The optimal proportion of design variables against f ck,7, f ck,28, f t,7 and f t,28 were obtained and the percentage of error of the confirmation tests for Y Slump, f ck,7, f ck,28, f t,7 and f t,28 were less than 3%.

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“…Extreme vertices method of mixture design with constraints that comprised of Rice 0.5 -0.7, Sorghum 0.1 -0.3 and Bamboo Shoot Flour 0.0 -0.3 on proportional basis so as to have a final mixture total of 1.0 (100%) was employed. Extreme vertices design was used because according to [19], this method is used in mixture experiments when constraints are applied on factors (ingredients). Hence, these factor constraints reduce the spatial volume of the factors and the factor level from 0 to 100% or 0.0 to 1.0 on proportional basis.…”

Section: Experimental Designmentioning

confidence: 99%

Optimization of Protein Content and Dietary Fibre in a Composite Flour Blend Containing Rice (Oryza sativa), Sorghum [Sorghum bicolor (L.) Moench] and Bamboo (Yushania alpine) Shoots

Wanjala¹,

Mary²,

Symon³

2020

FNS

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Initiatives on tackling food insecurity among global emerging economies are being focused on enriching native staple foods with locally available nutritious underutilized crops. The objective of this study was to optimize protein content and dietary fibre in rice (Oryza sativa) flour using Sorghum (Sorghum bicolor L.) and Bamboo shoots (Yushania alpina). An extreme vertices How to cite this paper: Wanjala, W.N., Mary, O. and Symon, M. (2020) Optimization of Protein Content and Dietary Fibre in a Composite Flour Blend Containing Rice (Oryza sativa), Sorghum [Sorghum bicolor (L.) Moench] and Bamboo (Yushania alpina) Shoots. Food and Nutrition Sciences, 11, 789-806.

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Optimizing the compressive strength of concrete containing micro-silica, nano-silica, and polypropylene fibers using extreme vertices mixture design

Cited by 34 publications

References 52 publications

Evaluation of Mechanical Performance of High Performance Hybrid Fiber Reinforced Concrete Containing Micro Silica

Evaluation of Mechanical Performance of High Performance Hybrid Fiber Reinforced Concrete Containing Micro Silica

A DOE approach to optimize the strength properties of concrete incorporated with different ratios of PVA fibre and nano-Fe₂O₃

Optimization of Protein Content and Dietary Fibre in a Composite Flour Blend Containing Rice (<i>Oryza sativa</i>), Sorghum [<i>Sorghum bicolor</i> (L.) Moench] and Bamboo (<i>Yushania alpine</i>) Shoots

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Optimizing the compressive strength of concrete containing micro-silica, nano-silica, and polypropylene fibers using extreme vertices mixture design

Cited by 34 publications

References 52 publications

Evaluation of Mechanical Performance of High Performance Hybrid Fiber Reinforced Concrete Containing Micro Silica

Evaluation of Mechanical Performance of High Performance Hybrid Fiber Reinforced Concrete Containing Micro Silica

A DOE approach to optimize the strength properties of concrete incorporated with different ratios of PVA fibre and nano-Fe2O3

Optimization of Protein Content and Dietary Fibre in a Composite Flour Blend Containing Rice (&lt;i&gt;Oryza sativa&lt;/i&gt;), Sorghum [&lt;i&gt;Sorghum bicolor&lt;/i&gt; (L.) Moench] and Bamboo (&lt;i&gt;Yushania alpine&lt;/i&gt;) Shoots

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A DOE approach to optimize the strength properties of concrete incorporated with different ratios of PVA fibre and nano-Fe₂O₃

Optimization of Protein Content and Dietary Fibre in a Composite Flour Blend Containing Rice (<i>Oryza sativa</i>), Sorghum [<i>Sorghum bicolor</i> (L.) Moench] and Bamboo (<i>Yushania alpine</i>) Shoots