Impact response of two-layered grouted aggregate fibrous concrete composite under falling mass impact

Haridharan, M. K.; Matheswaran, S.; Murali, G.; Abid, Sallal R.; Федюк, Роман; Amran, Mugahed; Abdelgader, Hakim S.

doi:10.1016/j.conbuildmat.2020.120628

Cited by 73 publications

(51 citation statements)

References 40 publications

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“…A small change was noted in the strength between these two specimens due to the addition of SF at the top layer, which shows the improved behaviour. This is ascribed to stress concentration at this particular region being significantly alleviated, which leads to arresting cracks by interlinking micro and macro cracks resulting in higher strength [ 24 ]. It is evident from Table 2 that the FPAFC specimen with three layers exhibited an enhancement in compressive strength as associated with the RC specimen.…”

Section: Discussion Of Experimental Test Resultsmentioning

confidence: 99%

“…Meanwhile, the damaged area’s diameter is measured in six directions to calculate the damaged area manually. Moreover, the thin needle is used to measure the penetration depth for every four impacts [ 24 ].…”

Section: Discussion Of Experimental Test Resultsmentioning

confidence: 99%

“…The penetration depth is considered as the projectile traveled in-depth into the FPAFC specimen normal to the impact surface [ 24 ]. The penetration depth was increased with an increasing number of impacts, as illustrated in Figure 6 .…”

Section: Discussion Of Experimental Test Resultsmentioning

confidence: 99%

“…This is ascribed to the exceptional resistance to penetration and cracks of the FPAFC comprising SF and PF. This is the anticipated damage pattern: the formation of a small crater at the top surface during initial impacts, resulting in many small pieces being ejected due to the damage, followed by the formation of a cylindrical penetration hole [ 24 ]. The RC’s damaged area was 4293 mm 2 and this damage happened with 12 impacts.…”

Section: Discussion Of Experimental Test Resultsmentioning

confidence: 99%

“…The needle was striking the FPAFC specimens with a velocity of 5 m/s per blow. The hammer weight and drop height have been maintained based on our earlier study [ 24 ]. The depth of penetration, weight loss, and the damaged area at the front and rear surfaces were noted for every four blows.…”

Section: Experimental Programmentioning

confidence: 99%

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Response of Novel Functionally-Graded Prepacked Aggregate Fibrous Concrete against Low Velocity Repeated Projectile Impacts

et al. 2021

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Preplaced Aggregate Fibrous Concrete (PAFC) is a newly minted composite that has recently become more popular. The production of PAFC involves two essential processes; first, the fibres and coarse aggregate were filled into the empty framework to form the first layer of a natural skeleton, followed by grout injecting. A cement grout fills the voids in the first layer skeleton with slight compaction. This process is repeated to complete the remaining layers; hence, a type of Functionally-graded Preplaced Aggregate Fibrous Concrete (FPAFC) is obtained. The most recent studies revealed that the literature regarding the high-velocity projectile impact on fibrous concrete is well documented; however, the low-velocity repeated projectile impact on PAFC is still unexplored and needs particular emphasis. This research aims to investigate the FPAFC made with a new type of steel and polypropylene fibres against low-velocity projectile impact to fill this research gap. In the current study, twelve mixes were prepared with mono and hybrid combinations of fibres for pioneering the possible utilization of fibres in FPAFC. The maximum fibre dosage in this study is limited to 2.4%. The projectile impact resistance of FPAFC was assessed in line with penetration depth, front and rear damage surface area, weight loss, damage ratio and failure pattern. Additionally, a simplified analytical model was introduced to compute the ejected composite mass from the tested specimens. The results revealed that the addition of steel fibre in a single layer FPAFC exhibited an increasing compressive strength trend compared to the two/three-layered FPAFC. Furthermore, increasing the dosage of fibre at the bottom and top layers of FPAFC with a hybrid combination alleviates the spalling with an increasing number of impacts. The results from this research offer the reference information for more detailed research and studies of FPAFC under low-velocity projectile impact.

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Section: Discussion Of Experimental Test Resultsmentioning

confidence: 99%

Section: Discussion Of Experimental Test Resultsmentioning

confidence: 99%

Section: Discussion Of Experimental Test Resultsmentioning

confidence: 99%

Section: Discussion Of Experimental Test Resultsmentioning

confidence: 99%

Section: Experimental Programmentioning

confidence: 99%

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Response of Novel Functionally-Graded Prepacked Aggregate Fibrous Concrete against Low Velocity Repeated Projectile Impacts

et al. 2021

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Enhancement of impact resistance of alkali‐activated slag concrete through biochar supplementation

Egodagamage,

Yapa,

Buddika

et al. 2024

Structural Concrete

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Biochar is a well‐known sustainable and effective additive used in mortar/concrete to improve its mechanical properties. However, its potential to improve the impact resistance of concrete is still unexplored. This paper investigates biochar's effectiveness in improving the strength and impact performance of alkali‐activated slag concrete (AASC). Five AASC samples with 0%, 2%, 4%, 6%, and 8% rice husk biochar (RB) were employed in an experimental program. The strength and the impact resistance were tested, and the latter was assessed over a drop‐weight test conforming to the ACI Committee 544 guidelines. The crack propagation of the impact‐tested samples was examined using micro‐CT images. The results showed that adding RB up to 6% improved, notably the 28‐day compressive strength of AASC. At 6% RB, the strength enhancement was 44.6%, whereas no additional gain was observed at the 8% RB blend. More importantly, except for the 8% RB sample, the impact resistance was considerably augmented with the RB level increment. The increment in the impact number at the first crack and the failure in the 6% RB sample were as high as 185% and 180%, respectively. The reduction in the solution/binder ratio of the mix with the addition of biochar and the internal curing effect of biochar were deemed to be responsible for these improvements. However, possibly due to biochar's brittle characteristics, the increase in RB dosage from 6% to 8% reduced the impact resistance drastically.

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Mechanical properties and impact resistance of concrete composites with hybrid steel fibers

Özalp

Yilmaz²,

Akcay

2022

Front. Struct. Civ. Eng.

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Impact response of two-layered grouted aggregate fibrous concrete composite under falling mass impact

Cited by 73 publications

References 40 publications

Response of Novel Functionally-Graded Prepacked Aggregate Fibrous Concrete against Low Velocity Repeated Projectile Impacts

Response of Novel Functionally-Graded Prepacked Aggregate Fibrous Concrete against Low Velocity Repeated Projectile Impacts

Enhancement of impact resistance of alkali‐activated slag concrete through biochar supplementation

Mechanical properties and impact resistance of concrete composites with hybrid steel fibers

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