On enhancing the mechanical behavior of ultra-high performance concrete through multi-scale fiber reinforcement

Ragalwar, Ketan; Heard, William F.; Williams, Brett A.; Kumar, Dhanendra; Ranade, Ravi

doi:10.1016/j.cemconcomp.2019.103422

Cited by 62 publications

(14 citation statements)

References 32 publications

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“…Workability: the results indicated a similar reduction on the optimal concrete matrix with PET recycled fibres and those with steel elements. Recycled PET fibre reinforced concrete 10-110 had lower workability (19%) with respect to control samples, while the Ragalwar et al [50] and Zemir et al [51] indicated a decrease from 9% to 15% of SFRC with 1% of steel fibres; this percentage is equivalent to the fibre dose used in this samples 10-110.…”

Section: Comparative Performance Of Optimal R/pet-frcmentioning

confidence: 77%

“…Ultimate compressive strength: similar to SFRC, the effect of the optimal recycled PET fibres into concrete is negligible. Vairagade and Kene [52], and Ragalwar et al [50] reported an augment of 6% to 10% in the response of SFRC samples with a fibre dose of 0.5 to 1%, referenced to control samples. Moreover, the optimal PET recycled fibre reinforced concrete was registered a reduction of 9%.…”

Section: Comparative Performance Of Optimal R/pet-frcmentioning

confidence: 98%

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Mechanical Optimization of Concrete with Recycled PET Fibres Based on a Statistical-Experimental Study

et al. 2021

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Discarded polyethylene terephthalate (PET) bottles have damaged our ecosystem. Problems of marine fauna conservation and land fertility have been related to the disposal of these materials. Recycled fibre is an opportunity to reduce the levels of waste in the world and increase the mechanical performance of the concrete. PET as concrete reinforcement has demonstrated ductility and post-cracking strength. However, its performance could be optimized. This study considers a statistical-experimental analysis to evaluate recycled PET fibre reinforced concrete with various fibre dose and aspect ratio. 120 samples were experimented under workability, compressive, flexural, and splitting tensile tests. The results pointed out that the fibre dose has more influence on the responses than its fibre aspect ratio, with statistical relation on the tensional toughness, equivalent flexural strength ratio, volumetric weight, and the number of fibres. Moreover, the fibre aspect ratio has a statistical impact on the tensional toughness. In general, the data indicates that the optimal recycled PET fibre reinforced concrete generates a superior performance than control samples, with an improvement similar to those reinforced with virgin fibres.

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Section: Comparative Performance Of Optimal R/pet-frcmentioning

confidence: 77%

Section: Comparative Performance Of Optimal R/pet-frcmentioning

confidence: 98%

Mechanical Optimization of Concrete with Recycled PET Fibres Based on a Statistical-Experimental Study

et al. 2021

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“…SDT such as pull out test, pull off test, computer tomography,chloride test etc 1,2 . is popular techniques to examine bond strength of steel fibers, 3 study interface between steel fiber and cementitious matrix, 4 characterize internal microstructure, 5 and evalaute behavior of bridge connections 6 . NDT based on vibration methods, imaging techniques, and nonlinear ultrasonic testing has been successfully applied to monitor deep foundation piles, 7 diagnose nonlinear effects in aircraft engines, 8 understand the behavior of transmission line conductors in field conditions by evaluating natural frequencies, 9 detect damage in fiber‐reinforced polymer‐bonded structures, 10 and describe modulated sidebands in metallic and carbon fiber‐reinforced polymer specimens 11 .…”

Section: Introductionmentioning

confidence: 99%

Smart monitoring of strengthened beams made of ultrahigh performance concrete using integrated and nonintegrated acoustic emission approach

Prem

Verma

Murthy

et al. 2021

Struct Control Health Monit

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Summary Ultrahigh performance concrete (UHPC) is one of the recent advancements in construction building materials and popularly used as a precast applications or strengthening material. The current paper attempts to improve understanding about fracture and failure mechanisms of UHPC application as a strengthening material using acoustic emission (AE) technique. The paper proposes an integrated and nonintegrated approach to relate the mechanical energy with AE energy for (i) undamaged reinforced concrete (RC) beams and (ii) damaged RC beams strengthened with UHPC. The integrated approach evaluates the damage mechanisms by evaluating sentry function (logarithmic ratio of mechanical and acoustic energy), while nonintegrated approach considers superimposition of flexure and AE response, load versus AE energy behavior and damage index. To validate the proposed approach, experiments are conducted on (i) control RC beams and (ii) RC beams strengthened with UHPC layers of t, 1.5t, and 2t thickness (where t = 10 mm). From the study, it is found that analysis of structures using both the approaches can overcome corresponding limitations. Hence, to completely characterize the damage, both methods are recommended.

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“…The future of the industry involves recycling, and CSWFs, commonly made of low-carbon steel, can be used in the form of rolls or pads in brake pad linings (as a thermal shield); in automobile exhaust pipes (as an acoustic shield); in metal separation, water, and air filtration; and in cleaning. The cost of CSWFs is ~30–50% of the cost of steel fibers and they can be produced from recycled metal scraps [ 10 ]. The presence of steel fibers in high-strength cementitious composites and conventional concrete prevents crack formation.…”

Section: Introductionmentioning

confidence: 99%

Optimizing of the Cementitious Composite Matrix by Addition of Steel Wool Fibers (Chopped) Based on Physical and Mechanical Analysis

et al. 2021

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The demand for durable, resistant, and high-strength structural material has led to the use of fibers as reinforcing elements. This paper presents an investigation into the inclusion of chopped steel wool fibers (CSWFs) in cement to form a high-flexural strength cementitious composite matrix (CCM). CSWFs were used as the primary reinforcement in CCM at increments of 0.5 wt%, from 0.5–6 wt%, with ratios of cement to sand of 1:1.5 and water to cement of 0.45. The inclusion of CSWFs resulted in an excellent optimization of the physicomechanical properties of the CCM, such as its density (2.302 g/cm3), compressive strength (61.452 MPa), and maximum flexural strength (10.64 MPa), all of which exceeded the performances of other reinforcement elements reported in the literature.

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On enhancing the mechanical behavior of ultra-high performance concrete through multi-scale fiber reinforcement

Cited by 62 publications

References 32 publications

Mechanical Optimization of Concrete with Recycled PET Fibres Based on a Statistical-Experimental Study

Mechanical Optimization of Concrete with Recycled PET Fibres Based on a Statistical-Experimental Study

Smart monitoring of strengthened beams made of ultrahigh performance concrete using integrated and nonintegrated acoustic emission approach

Optimizing of the Cementitious Composite Matrix by Addition of Steel Wool Fibers (Chopped) Based on Physical and Mechanical Analysis

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