Exploring the impact performance of functionally-graded preplaced aggregate concrete incorporating steel and polypropylene fibres

Prasad, Nandhu; Murali, G.

doi:10.1016/j.jobe.2020.102077

Cited by 43 publications

(36 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the fibre dosage used in this study is limited to 2.4%. The combination of fibre has been chosen based on an earlier study [13]. quality water reducing agent was used to flow grout freely, which leads to filling voids effectively in the aggregate skeleton through the method of gravity.…”

Section: Mixing Proportionsmentioning

confidence: 99%

“…Hence, the fibre dosage used in this study is limited to 2.4%. The combination of fibre has been chosen based on an earlier study [13].…”

Section: Mixing Proportionsmentioning

confidence: 99%

“…A new type of non-homogeneous concrete is called functionally graded concrete, which has varying structural properties from one side to the other. Because of this, a higher fibre dosage is used only in the top and bottom layers of structural concrete against impact loading under compression and bending [12,13]. Quek et al [14] studied the small projectile impact response of functionally graded cementations panels (FGCP) under high-velocity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2021

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Mixing Proportionsmentioning

confidence: 99%

“…Hence, the fibre dosage used in this study is limited to 2.4%. The combination of fibre has been chosen based on an earlier study [13].…”

Section: Mixing Proportionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…On this basis, several researchers have been employed to improve the FRC materials, which can exhibit a superior impact resistance to conventional concrete. The development of material technology and unification has enhanced the emergence of a new named composite: two-stage fibrous concrete (TSFC) [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that the load-carrying capability of the multilayered FGFC beams increased up to 36%. Nandhu Prasad and Murali [ 11 ] investigated the effect of three-layered FGFC cylindrical specimens when subjected to drop-mass impact. FGFC specimens with varying steel and polypropylene fibre doses in each layer were provided in two- and three-layered configurations.…”

Section: Introductionmentioning

confidence: 99%

Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete

2021

Self Cite

View full text Add to dashboard Cite

This research examined the performance of functionally graded two-stage fibrous concrete (FTSFC) against modified repeated falling-mass impacts. This study led to the concept of creating improved multiphysics model of fibre composites with better impact resistance for potential protective constructions. FTSFC was developed based on the bio-inspiring strength of turtle shells. The excellent impact resistance of FTSFC was accomplished by including a larger quantity of steel and polypropylene fibres in the outer layers. At the same time, one- and two-layered concrete were cast and compared to evaluate the efficiency of three-layered FTSFC. To minimize the dispersed test results, a modified form of the 544 drop-mass impact test was recommended by the American Concrete Institute (ACI). The modification was a knife-edge notched specimen instead of a solid cylindrical specimen without a notch. This modification predefined a crack path and reduced the dispersion of results. Cracking and failure impact numbers, ductility index, and failure mode were the testing criteria. The suggested modification to the ACI impact test decreased the coefficient of variance, showing that the dispersion of test results was reduced significantly. This study led to the concept of creating improved, fibre composites with better impact resistance for potential protective constructions.

show abstract

Experimental study, modeling, and reliability analysis of impact resistance of micro steel fiber‐reinforced concrete modified with nano silica

Haruna

Zhu

Shao

2022

Structural Concrete

View full text Add to dashboard Cite

This paper presents the experimental, statistical modeling, and reliability analysis of impact resistance of micro steel fiber reinforced concrete (FRC) incorporated with nano silica (NS) using a drop-weight impact test. U-shaped concrete specimens were developed for the experimental work. The result showed that the combined effect of micro steel fiber (SF) and NS led to significant improvement of impact resistance of concrete mixtures, and lower ductility ratios were obtained for specimens with high SF and NS content. A common failure pattern was observed for all the concrete specimens. The response surface methodology models developed to predict the impact resistance of FRC-NS mixtures showed a high degree of correlation. Due to the variation in the dropweight impact test' result, the Weibull distribution (WD) function was employed for advance analysis, and the result revealed that the probabilistic distribution of first crack strength (N 1 ) and failure strength (N 2 ) follows the two-parameter WD.

show abstract

Exploring the impact performance of functionally-graded preplaced aggregate concrete incorporating steel and polypropylene fibres

Cited by 43 publications

References 48 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

Modified Falling Mass Impact Test Performance on Functionally Graded Two Stage Aggregate Fibrous Concrete

Experimental study, modeling, and reliability analysis of impact resistance of micro steel fiber‐reinforced concrete modified with nano silica

Contact Info

Product

Resources

About