Bond Performance of High-Volume Fly Ash Self-Consolidating Concrete (HVFA-SCC) in Full-Scale Beams

Alghazali, Hayder H.; Myers, John J.

doi:10.14359/51706920

Cited by 10 publications

(6 citation statements)

References 10 publications

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“…In addition, splice length data of special type of concretes (HVFA, SCC, HVFA-SCC) are included for this comparison. The following literatures provide the useful data: [23,33,39] for HVFA; [31,32,36,37,40]- [42] for SCC; and [43] for HVFA-SCC. The collected data is presented in Fig.…”

Section: Comparison To Other Concretementioning

confidence: 99%

“…On the other hand, insufficient splices length can induce splitting of concrete or slippage of the splice reinforcements with a consequence of brittle failure. Therefore, the minimum required splice length should be determined by considering the whole performance parameters of the respected reinforced concrete beam and not just the strength [16].…”

Section: Introductionmentioning

confidence: 99%

“…However, the slippage that occurs after the crushing of concrete around the reinforcement is faster in HVFA concrete than conventional concrete. Alghazali and Myers [16] investigated bond performance of reinforcing bars in full scale HVFA-SCC beams. The inclusion of fly ash was in the range of 50-70%.…”

Section: Introductionmentioning

confidence: 99%

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Flexural performance of reinforced HS-HVFA-SCC beam with spliced plain bar

2022

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This research presents the use of flexural performance criteria for determining the required spliced length of tensile plain bar embedded in unconfined high strength-high volume fly ash-self compacting concrete (HS-HVFA-SCC) beam. Subsequently, the obtained splice length is compared with the splice length database of other concrete types. For the purpose of the investigation, five beams are designed with various spliced bars within the pure bending area. In addition, a beam with continuous bar is prepared as a reference beam. The beams are tested by a four-point loading scheme. The results show that splice lengths within a 342–570 mm (34.2db–57db) range provide sufficient development of strength in the reinforcements to sustain a higher flexural load than the reference beam. However, in term of stiffness and ductility, only beams with a splice length of at least 380 mm (38db) are superior compared to the reference beam. Based on the above consideration, the minimum splice length of tensile plain reinforcement for the investigated beams is 380 mm (38db). Comparison of the result with other concrete types suggests that the required splice length of tensile plain bar embedded in HS-HVFA-SCC follows the equations for estimating splice length of general concrete and self-compacting concrete (SCC) even though the equations are derived for deformed bars. This finding implies that an efficient splice length in HS-HVFA-SCC beam can be expected. Article Highlights HS-HVFA-SCC beam with a lap-spliced plain bar of 38db gives an equal flexural performance to the beam with continuous bar. The required splice length of plain bar in HS-HVFA-SCC beam is comparable to that of deformed bar in other concrete types. An expected efficiency of splice length can encourage the use of HS-HVFA-SCC for a variety of structural applications.

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Section: Comparison To Other Concretementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flexural performance of reinforced HS-HVFA-SCC beam with spliced plain bar

2022

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“…However, the HVFAC can also be proportioned in such a way to meets the criteria of Self Compacting Concrete (SCC) to form a special type of concrete termed HVFA-SCC. According to Alghazali et al [6], using SCC will reduce the working time and the energy in the casting process because concrete can solidify by itself. Subsequently, from the sustainability perspective, HVFA-SCC can be potentially utilized to promote environmentally friendly concrete for various infrastructure development.…”

Section: Introductionmentioning

confidence: 99%

Bond strength between reinforcement and High Volume Fly Ash-Self Compacting Concrete (HVFA-SCC)

Rohman

Kristiawan

Basuki

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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This paper explains the bond strength between the reinforcing bar and High Volume Fly Ash-Self Compacting Concrete (HVFA-SCC). The bond strength is determined by a pull-out test on the concrete cube (200x200x200 mm) with a single steel bar centrally placed in the cube following the RILEM standard. The HVFA-SCC is proportioned with an inclusion of 50% fly ash by weight of the total binder. The concrete satisfies the flowability criteria of SCC and has the average concrete compressive strength of 38.8 MPa. The test result shows that an average bond strength of HVFA-SCC is 12.93 Mpa and 3.89 MPa for deformed and plain bars, respectively. The obtained bond strength of HVFA-SCC is compared with the bond strength of other concrete types found in the literature. It confirms that the HVFA-SCC bond strength is higher than normal concrete (NC), and comparable with geopolymer concrete (GC), HVFAC, and SCC.

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“…On the other hand, a type of concrete has been developed, which is capable of compacting itself, filling mold voids and passing through reinforcement, called Self-compacting Concrete (SCC) (EFNARC, 2002). Combining the concepts of HVFA and SCC is one of the efforts to obtain strong and sustainable concrete (Alghazali and Myers, 2019).…”

Section: Introductionmentioning

confidence: 99%

Tension-Stiffening of Reinforced HVFA-SCC Beams

Falah¹,

Kristiawan²,

Saifullah³

2023

JJCE

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Prediction of cracking behavior and deformation of reinforced concrete is a complex problem, including reinforced concrete that can still bear tensile stress after cracking due to the bond between reinforcement and surrounding concrete, termed the tension-stiffening effect. This research aims to determine the tension-stiffening of reinforced High Volume Fly Ash Self-compacting Concrete (HVFA-SCC) at various tensile reinforcement ratios. In this tension-stiffening analysis, shrinkage and creep effects are taken away. The data used in the analysis was obtained from beams tested with two loading points. The tests were conducted on six reinforced HVFA-SCC beams and six Normal Concrete (NC) beams with dimensions of 150 x 250 x 2000 mm, with tensile reinforcement ratios of 0.61%, 1.10% and 1.55%. The analysis shows that the effect of creep on shrinkage is negligible, so that it can be ignored in the calculation. On the other hand, shrinkage increases the value of the maximum tension-stiffening stress by 1.43% and the ultimate tension-stiffening stress (𝜎𝑡𝑠,u) by 72.51% from the initial tension-stiffening values. The greater the tensile reinforcement ratio in concrete, the smaller the effect of tension-stiffening stress. KEYWORDS: Creep, HVFA-SCC, NC, RC beams, Shrinkage, Tension-stiffening.

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Bond Performance of High-Volume Fly Ash Self-Consolidating Concrete (HVFA-SCC) in Full-Scale Beams

Cited by 10 publications

References 10 publications

Flexural performance of reinforced HS-HVFA-SCC beam with spliced plain bar

Flexural performance of reinforced HS-HVFA-SCC beam with spliced plain bar

Bond strength between reinforcement and High Volume Fly Ash-Self Compacting Concrete (HVFA-SCC)

Tension-Stiffening of Reinforced HVFA-SCC Beams

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