Mechanical Behavior of Corroded Steel in Lightweight Concrete: A Review

Zaki, Ahmad; Putri, O Meilanny Dyah Kumala; Yadi, Seplika; Rommel, Erwin

doi:10.1088/1755-1315/832/1/012015

Cited by 9 publications

(4 citation statements)

References 44 publications

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“…As the pressure load increased, the cracks propagated vertically from the bottom of the beam specimen to indicate tensile fracture under flexure [14]. Continuous load to the beam resulted in the start of steel reinforcement yielding, causing beam failure localization to form macro-cracks [45]. In this case, the ratio between the span length and height of the concrete beam is 520/150 or 3.47, so the concrete beam is predicted to be dominated by a shear failure pattern.…”

Section: Reinforced Concrete Failure Patternmentioning

confidence: 99%

Effect of Bacillus Subtilis Bacteria on The Mechanical Properties of Corroded Self-Healing Concrete

Nindhita,

Zaki,

Zeyad

2024

Frattura Ed Integrità Strutturale

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Reinforced concrete has a weakness for corrosion which can cause the concrete to crack and the concrete structure to fail. To overcome this problem, a self-healing concrete method is needed that can close cracks and inhibit the rate of natural corrosion. Bacillus subtilis as a self-healing agent in concrete has been proven to be able to increase the compressive strength and flexural strength of concrete. The method used in this research is to add bacterial hydrogel encapsulation to concrete with a variation of 0%; 0.1%; 0.6%; and 1.5% by weight of sand. The test object is a reinforced concrete beams and cylindrical concrete with compressive design strength of 30 MPa. The concrete specimens will go through a series of tests, such as corrosion acceleration tests using DC power supply, self-healing tests by visual observation, flexural strength, ductility, stiffness, and compressive strength tests using Universal Testing Machine (UTM). From the test results, it was found that the addition of 0.1% bacterial encapsulation variation was the optimum value for increasing the mechanical properties of self-healing concrete and reduce the corrosion rate on self-healing concrete.

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Section: Reinforced Concrete Failure Patternmentioning

confidence: 99%

Effect of Bacillus Subtilis Bacteria on The Mechanical Properties of Corroded Self-Healing Concrete

Nindhita,

Zaki,

Zeyad

2024

Frattura Ed Integrità Strutturale

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“…Aggregate in crushed stone is one of the natural materials often used, so it must be limited to preserve nature. One solution is to use oil palm shells [3] as a substitute for some or all of the aggregate [4,5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of oil palm shells and mask fiber on the flexural strength of pre- and post-corrosion concrete

Zaki,

Mahpuzah,

Nisa

et al. 2024

E3S Web Conf.

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One of the innovations in concrete technology that is also in line with reducing industrial and community waste is making mask fiber concrete mixed with oil palm shells as an aggregate substitute. In this research, 10% oil palm shells were used with mask fiber added at 0.2% of the specimen volume to increase the flexural strength value of corroded concrete. Tests include corrosion acceleration tests and concrete mechanical properties such as flexural strength, density, and ductility. There are two specimens, namely pre- and post-corrosion concrete. With the acceleration process, pre-corrosion specimens are carried out on the reinforcement before the concrete molding process, while post-corrosion specimens are accelerated by corrosion after the concrete is 28 days old. Tests on pre- and post-corrosion specimens show differences in the properties and characteristics of the concrete mechanical properties test results. The flexural strength value of post-corrosion concrete tends to increase with increasing corrosion. Meanwhile, the flexural strength value of pre-corrosion concrete experienced a decreasing trend along with increasing levels of corrosion.

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“…Many studies have been conducted to determine the characteristics of OPS concrete, especially regarding its effect on the flexural strength of reinforced concrete (RC) [2][3][4][5]. However, research on using OPS as a replacement for coarse aggregate on the flexural strength of corroded concrete is very limited, except for concrete using recycled concrete aggregate (RCA) [6][7][8][9]. These various studies found that the greater the use of OPS, the more it will affect the value of flexural strength, where a percentage of OPS of 10% has the optimum compressive strength value [10].…”

Section: Introductionmentioning

confidence: 99%

Evaluating Pre-Corrosion and Post-Corrosion of Oil Palm Shell Concrete with Non-Destructive Testing

Zaki

Fikri

Wibisono

et al. 2023

KEM

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Corrosion of reinforcement can decrease the quality and cause damage to reinforced concrete, so it is necessary to know the resistance of concrete, especially with oil palm shells (OPS) and mask fibers in a corrosive environment. This study aims to determine the effect of corrosion levels on OPS concrete and mask fiber using the NDT (non-destructive testing) method. Oil palm shells are a 10% replacement for coarse aggregate in the concrete mix. The mask fiber is 0.2% of the volume of the specimen, and the superplasticizer is 0.25% of the cement used as an additive in the concrete mixture. The specimen is 50 cm long, 10 cm wide, and 10 cm high. There are two types of specimens, namely pre-corrosion and post-corrosion. In pre-corrosion specimens, corrosion acceleration of the reinforcement is carried out before the concrete molding process. While the post-corrosion specimen is being prepared, corrosion acceleration is carried out after the concrete is 28 days old. Corrosion acceleration is carried out by immersing the concrete specimen in a 5% NaCl solution and using a DC power supply. After the concrete is corroded, NDT is carried out. The NDT methods used are resistivity and impact-echo as analysis and detection tools for the effect of corrosion on palm shell concrete and mask fiber. The pre-corrosion specimen got the highest resistivity value on the 0% specimen at 21.35 kΩ.cm and the lowest resistivity on the 5% specimen at 16.70 kΩ.cm. The resistivity value decreases with increasing corrosion levels. The post-corrosion concrete has the highest resistivity on the 0% specimen, with 18.56 kΩ.cm, and the lowest resistivity on the 5% specimen, with 13.88 kΩ.cm. The resistivity value decreases with increased corrosion levels. The impact-echo testing on the pre-corrosion specimen yielded a 0% specimen with a value of 14394.53 Hz and a 1% specimen of 18266.6 Hz. The frequency value decreases with increasing corrosion levels. The result of impact-echo testing on post-corrosion concrete was 14394.53 Hz for the 0% specimen and 1567.38 Hz for the 5% specimen. The frequency value decreases with increasing corrosion levels.

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Mechanical Behavior of Corroded Steel in Lightweight Concrete: A Review

Cited by 9 publications

References 44 publications

Effect of Bacillus Subtilis Bacteria on The Mechanical Properties of Corroded Self-Healing Concrete

Effect of Bacillus Subtilis Bacteria on The Mechanical Properties of Corroded Self-Healing Concrete

Evaluation of oil palm shells and mask fiber on the flexural strength of pre- and post-corrosion concrete

Evaluating Pre-Corrosion and Post-Corrosion of Oil Palm Shell Concrete with Non-Destructive Testing

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