Combined Non-Destructive Testing (NDT) method for the evaluation of the mechanical characteristics of Ultra High Performance Fibre Reinforced Concrete (UHPFRC)

Τσιούλου, Ουρανία; Λαμπρόπουλος, Ανδρέας; Paschalis, Spyridon A.

doi:10.1016/j.conbuildmat.2016.11.068

Cited by 82 publications

(30 citation statements)

References 24 publications

(31 reference statements)

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“…These observations imply that the addition of fibers does not significantly influence Young's modulus of concrete irrespective of the type and dosage of fibers. This is similar to those reported by ACI and some researchers, such as Noushini et al and Tsioulou et al . Nevertheless, when the volume fraction of PVA fiber increases, a decreased modulus of elastic is anticipated for PFR‐UHSC due to the lower modulus of fibers themselves …”

Section: Results and Analysessupporting

confidence: 91%

“…Compared with the compressive strengths obtained from cubic and prism plain UHSC (namely, V f = 0) specimens, the counterparts of SFR‐UHSC specimens with V f = 1.0% are increased by 3.49 and 8.44%, respectively. Moreover, the enhancement of compressive strength caused by steel fibers increases with an increasing fiber content in our previous work and experiment of Tsioulou et al When it comes to PFR‐UHSC, it can be seen from Table and Figure that its cubic compressive strengths were decreased by 5.24, 6.64, and 13.28%, respectively, for the three dosages of fibers while the corresponding reduction for prism compressive strengths were 3.22, 6.17, and 9.26%. This phenomenon may be explained by considering the fact that Young's modulus of PVA fiber is lower than that of UHSC matrix, resulting in a weaker constraint when subjected to compression.…”

Section: Results and Analysessupporting

confidence: 54%

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Static and dynamic mechanical properties of eco‐friendly polyvinyl alcohol fiber‐reinforced ultra‐high‐strength concrete

Zhang

Jin

YiShui

et al. 2019

Structural Concrete

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An eco‐friendly polyvinyl alcohol (PVA) fiber‐reinforced ultra‐high‐strength concrete (PFR‐UHSC) was designed and mixed to evaluate its static and dynamic mechanical properties in this study. A lower water‐to‐binder ratio of 0.22 and a superplasticizer were used to guarantee the performance of PFR‐UHSC, while several industrial by‐products were involved to reduce the negative environmental impact of concrete. Four volume fraction of PVA fibers (Vf = 0, 0.5, 1.0, and 1.5%) were included in the experiment and steel fiber‐reinforced ultra‐high‐strength concrete (SFR‐UHSC) with Vf = 1.0% was also tested as a comparison. Experiment results show that although less ductile than SFR‐UHSC, PFR‐UHSC exhibits relatively good ductility, toughness, and deformability under static loadings. Namely, splitting tensile and flexural strengths as well as flexural toughness of PFR‐UHSC are significantly improved by the incorporation of PVA fibers while no obvious variation is viewed for Young's modulus. And even, the compressive strength of PFR‐UHSC decreases slightly with the increasing PVA fiber dosage. When subjected to dynamic loadings with lower strain rates, PFR‐UHSC displays a better performance than SFR‐UHSC in terms of failure patterns, while a reverse behavior is observed for high strain rate. Affected by introduction of PVA fiber, the enhancement of strain rate for compressive strength of PFR‐UHSC is lower than that for ordinary concrete but higher than that for SFR‐UHSC. Besides, although having a slightly lower compressive toughness, the energy absorption capacity of PFR‐UHSC is similar to that of SFR‐UHSC.

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Section: Results and Analysessupporting

confidence: 91%

Section: Results and Analysessupporting

confidence: 54%

Static and dynamic mechanical properties of eco‐friendly polyvinyl alcohol fiber‐reinforced ultra‐high‐strength concrete

Zhang

Jin

YiShui

et al. 2019

Structural Concrete

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“…Results showed that, from normally vibrated concrete to Ultra-High Strength concrete and the water powder ratio, the water-binder ratio, and the admixtures relatively has influence on the rebound index number and compressive strengths. Ourania Tsioulou et al [11] studies shows, the evaluation of tensile strength and the Compressive strength using UPV and Rebound Hammer measurements. Author uses the combination of methods in his analysis.…”

Section: Literature Reviewmentioning

confidence: 99%

Condition Assessment of Existing Concrete Building Using Non-Destructive Testing Methods for Effective Repair and Restoration-A Case Study

Venkatesh

Alapati

2017

CivileJournal

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Buildings constructed during early 70's & late 80's of the last century in India are found to be in distressed conditions due to inadequate specifications and poor construction practices. The continuous monitoring of concrete structures using suitable NDT (Non Destructive Testing) methods and use of possible restoration methods help in a considerable reduction of the rate of deterioration of concrete structures thereby increasing the life span of structures. NDT methods have greater advantage in evaluating the uniformity, homogeneity, approximate compressive strength, durability, the extent of corrosion of rebars in concrete etc. of damaged structures. The objective of the present study is to enhance the life of 50 year old existing hospital building (Partly RC and Brick masonry) in Kurnool, Andhra Pradesh. Condition assessments are carried out through a visual, field and laboratory evaluation of samples collected from the structure and results are presented in this paper. The paper also highlights the assessment of strength and durability of concrete to evaluate the extent of distress and damage in the building. Besides visual inspection, the Non Destructive Evaluation covering UPV & Rebound Hammer values and Half Cell Potential with respect to the status of corrosion of reinforcing bars and chemical tests on selected undistressed RC columns, beams, and slabs are also presented and discussed. The repair and strengthening techniques using the latest materials and possible restoration works such as column jacketing, shotcreting, anticorrosive coatings, etc. have been suggested to enhance the life of the structure.

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“…A number of researchers as in [4], [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20] and [21] exercised DT and NDT methods and proposed numerous relationships between the two.…”

Section: Introductionmentioning

confidence: 99%

Reliability of Non-Destructive Testing Methods in the Assessment of the Strength of Concrete Columns Reinforced with Two Layers of Transverse Confining Stirrups: Empirical Evidence

Kumar¹,

Zaidi²,

Jain³

et al. 2019

IJRTE

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Wide spread literature is available on the approach to assess the strength of Reinforced Concrete structures. However no attention has been made so far to study the similar potential when the RC columns are reinforced with double layer of transverse confining stirrups. An obvious reason could be that studies in double layered stirrups options are quite at their infancy. The authors took the advantage of their involvement in studying the axial compression behaviour in terms of strength and ductility of concrete columns reinforced with double layered transverse confining stirrups, applied the two non-destructive measures, viz., Rebound Hammer Test Method (RHTM) and Ultrasonic Pulse Velocity Test Technique (UPVTT), and destructive testing measure, viz., Compression Testing Method (CTM) on the specimens that they have developed in this study. The results have been subjected to regression techniques to build relevant equations for predictability. The present study attempts to explain the detailed procedures adopted within the frame work of the informed knowledge and had attempted to derive meaningful implications for the use of practitioners and academic fraternity. The findings of this paper drew attention to the superior impact of a combined non-destructive testing approach whereby RHTM and UPVTT have been merged in a fashion to yield better assessment of RC columns with double layers of transverse confining stirrups. The combined influence of RHTM and UPVTT clearly explain, greater characteristic compressive strength as one moves from a specimen with a Normal Strength Concrete (NSC) to a specimen with High Strength Concrete (HSC).

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Combined Non-Destructive Testing (NDT) method for the evaluation of the mechanical characteristics of Ultra High Performance Fibre Reinforced Concrete (UHPFRC)

Cited by 82 publications

References 24 publications

Static and dynamic mechanical properties of eco‐friendly polyvinyl alcohol fiber‐reinforced ultra‐high‐strength concrete

Static and dynamic mechanical properties of eco‐friendly polyvinyl alcohol fiber‐reinforced ultra‐high‐strength concrete

Condition Assessment of Existing Concrete Building Using Non-Destructive Testing Methods for Effective Repair and Restoration-A Case Study

Reliability of Non-Destructive Testing Methods in the Assessment of the Strength of Concrete Columns Reinforced with Two Layers of Transverse Confining Stirrups: Empirical Evidence

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