Residual Impact Performance of ECC Subjected to Sub-High Temperatures

Al-Ameri, Raad A.; Abid, Sallal R.; Murali, G.; Ali, Sajjad H.; Özakça, Mustafa; Vatin, Nikolai

doi:10.3390/ma15020454

Cited by 19 publications

(10 citation statements)

References 64 publications

(73 reference statements)

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“…A simple definition of impact ductility index (ID) may be expressed as the ratio of the failure impact energy to the cracking impact energy. In many previous studies, this concept was used to discriminate between the impacts of various fibre materials when subjected to multiple impact loads [ 50 , 51 ]. The calculated impact ductility index of all PAFC specimens is shown in Figure 16 .…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Enhancing the Impact Strength of Prepacked Aggregate Fibrous Concrete Using Asphalt-Coated Aggregates

et al. 2022

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The brittleness of plain concrete represents a significant issue to the integrity of concrete structures when subjected to impact loading. Recent rapid industrialization has attracted researchers to find a solution for concrete brittleness and enhance its ductility. In light of this, the prepacked aggregate fibrous concrete (PAFC) with single and double precoated coarse aggregates using asphalt is proposed and examined. Nine different mixtures were designed using polypropylene and steel fibre of 3% dosage with single and double asphalt-coated aggregates. Specimens were prepared with natural aggregate and 100% C-graded asphalt-coated aggregate to evaluate their impact strength. The ACI Committee 544 drop-weight impact standard was followed in the testing of all specimens. Results indicated that using asphalt-coated aggregate can improve the impact energies of concrete. The impact energy at cracking and failure of the single asphalt-coated aggregate specimen was 1.55 and 2.11 times higher, while the double-coated aggregate specimens exhibited 1.73 and 2.56 times greater than the natural aggregate specimen, respectively. The contribution of fibres in enhancing the impact resistance is remarkable compared to the single- and double-coated aggregates used in PAFC.

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Section: Discussion Of Resultsmentioning

confidence: 99%

Enhancing the Impact Strength of Prepacked Aggregate Fibrous Concrete Using Asphalt-Coated Aggregates

et al. 2022

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“…However, the suggested specimen shape imposed noticeably different load transferring, specimen holding and failure criterion techniques from the standards of ACI 544-2R. On the other hand, an automatic repeated drop-weight impact machine was introduced and facilitated by Al-Ameri et al [ 55 , 56 ] to conduct the ACI 544-2R impact test, which significantly reduced the effort and time required to conduct the tests.…”

Section: Suggested Modifications To the Aci 544-2r Repeated Impact Testmentioning

confidence: 99%

“…However, significant research was conducted during the last few years using the repeated impact test procedure. The ACI 544-2R repeated impact test was used to evaluate the impact performance of several types of cementitious mixtures in the literature, including normal-strength and high-strength concrete [ 29 ], steel-fiber-reinforced concrete [ 30 , 31 , 32 ], synthetic-fiber-reinforced concrete [ 33 , 34 , 35 , 36 , 37 ], hybrid-fiber-reinforced concrete [ 30 , 38 , 39 , 40 ], plain and fibrous self-compacting concrete [ 41 , 42 , 43 , 44 , 45 , 46 , 47 ], high-performance and ultra-high-performance concrete [ 48 , 49 , 50 , 51 , 52 ], engineered cementitious composites [ 53 , 54 , 55 , 56 ], plain and fibrous preplaced aggregate concrete [ 57 , 58 , 59 , 60 , 61 ] and layered concrete [ 62 , 63 ]. On the other hand, other studies tried to investigate the effect of the addition of some materials and additives, such as crumb rubber [ 41 , 44 , 64 ], recycled materials [ 42 , 43 , 65 ], natural fibers [ 6 , 36 ], nano material [ 66 ,…”

Section: Introductionmentioning

confidence: 99%

Repeated Drop-Weight Impact Testing of Fibrous Concrete: State-Of-The-Art Literature Review, Analysis of Results Variation and Test Improvement Suggestions

et al. 2022

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The ACI 544-2R introduced a qualitative test to compare the impact resistance of fibrous concretes under repeated falling-mass impact loads, which is considered to be a low-cost, quick solution for material-scale impact tests owing to the simplified apparatus, test setup and procedure, where none of the usual sophisticated sensors and data acquisition systems are required. However, previous studies showed that the test results are highly scattered with noticeably unacceptable variations, which encouraged researchers to try to use statistical tools to analyze the scattering of results and suggest modifications to reduce this unfavorable disadvantage. The current article introduces a state-of-the-art literature review on the previous and recent research on repeated impact testing of different types of fibrous concrete using the ACI 544-2R test, while focusing on the scattering of results and highlighting the adopted statistical distributions to analyze this scattering. The influence of different mixture parameters on the variation of the cracking and failure impact results is also investigated based on data from the literature. Finally, the article highlights and discusses the literature suggestions to modify the test specimen, apparatus and procedure to reduce the scattering of results in the ACI 544-2R repeated impact test. The conducted analyses showed that material parameters such as binder, aggregate and water contents in addition to the maximum size of aggregate have no effect on the variation of test results, while increasing the fiber content was found to have some positive influence on decreasing this variation. The survey conducted in this study also showed that the test can be modified to lower the unfavorable variations of impact and failure results.

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“…Engineered cementitious composite (ECC) materials are high-performance fiberreinforced cementitious composites developed for high-tensile load-bearing applications and cost-conscious construction sectors [1,2]. To accomplish a steady-state multiple cracking and strain-hardening behavior under tension, ECC is a cement-based composite material reinforced with polymeric fibers with a dosage of 2%, such as polyethylene fibers (PE), polyvinyl alcohol (PVA), polypropylene (PP), and others.…”

Section: Introductionmentioning

confidence: 99%

Analytical and Numerical Investigation of the Behavior of Engineered Cementitious Composite Members under Shear Loads

Arulanandam¹,

Sivasubramnaian²,

Chellapandian³

et al. 2022

Materials

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This research discusses the performance of engineered cementitious composite (ECC) beams with and without transverse reinforcements using thorough analytical and finite element (FE) approaches under shear. The overall goal of this investigation was to assess the impact of various design characteristics, such as (i) shear span-to-effective depth ratio, (ii) transverse reinforcement ratio, etc., on the shear behavior of ECC beams. Nonlinear three-dimensional (3-D) FE analysis was performed with the commercial software ABAQUS to simulate the shear performance of ECC beams by employing the material properties obtained from the damage plasticity model. The correctness of the proposed FE model was validated with the benchmark experiments available in the literature. The developed FE model accurately computed the ECC beam’s overall load–deflection behavior and failure modes. In addition, the provision available in the Architectural Institute of Japan (AIJ) A-method was successfully employed to assess the shear load-carrying capacity of ECC beams. Furthermore, the effects of transverse reinforcement (pw) and shear span-to-depth ratio (a/d) on the behavior of ECC beams were also investigated. From a detailed parametric study, it was understood that a decreased a/d ratio exhibits enhanced load-carrying capacity for beams with and without stirrups for a particular cross-section. It was also observed that for the entire a/d ratio, the amount of stirrups had no substantial effect on the load-carrying capability of ECC beams.

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Residual Impact Performance of ECC Subjected to Sub-High Temperatures

Cited by 19 publications

References 64 publications

Enhancing the Impact Strength of Prepacked Aggregate Fibrous Concrete Using Asphalt-Coated Aggregates

Enhancing the Impact Strength of Prepacked Aggregate Fibrous Concrete Using Asphalt-Coated Aggregates

Repeated Drop-Weight Impact Testing of Fibrous Concrete: State-Of-The-Art Literature Review, Analysis of Results Variation and Test Improvement Suggestions

Analytical and Numerical Investigation of the Behavior of Engineered Cementitious Composite Members under Shear Loads

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