Sustainable and Low-Cost Hemp FRP Composite Confinement of B-Waste Concrete

Joyklad, Panuwat; Yooprasertchai, Ekkachai; Rahim, Abdur; Ali, Nazam; Chaiyasarn, Krisada; Hussain, Qudeer

doi:10.3390/su14137673

Cited by 9 publications

(4 citation statements)

References 65 publications

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“…The goal of this research work is to enhance the subpar mechanical characteristics of recycled aggregate concrete (RAC) that contains a 50% replacement of natural aggregates with fired-clay brick aggregates (CBB). Recently, a study was conducted to partially replace natural aggregates with hydraulically pressed cement brick aggregates [ 40 ]. However, the current study investigates the effectiveness of fired-clay brick aggregate waste by replacing 50% of natural aggregates in concrete.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Stress–Strain Curves for HFRP Composite Confined Brick Aggregate Concrete under Axial Load

et al. 2023

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Recently, hemp-fiber-reinforced polymer (HFRP) composites have been developed to enhance the strength and ductility of normal and lightweight aggregate concrete along with recycled brick aggregate concrete. In addition, both experimental and analytical investigations have been performed to assess the suitability of the existing strength and strain models. However, the theoretical and analytical expressions to predict the stress–strain curves of HFRP-confined concrete were not developed. Therefore, the main objective of this study was to develop analytical expressions to predict the stress–strain curves of HFRP-confined waste brick aggregate concrete. For this purpose, a new experimental framework was conducted to examine the effectiveness of HFRP in improving the mechanical properties of concrete constructed with recycled brick aggregates. Depending on the strength of the concrete, two groups were formed, i.e., Type-1 concrete and Type-2 concrete. A total of sixteen samples were tested. The ultimate compressive strength and strain significantly increased due to HFRP confinement. Improvements of up to 272% and 457% in the ultimate compressive strength and strain were observed due to hemp confinement, respectively. To predict the ultimate compressive strength and strain of HFRP-confined concrete, this study investigated several existing analytical stress–strain models. Some of the strength models resulted in close agreement with experimental results, but none of the models could accurately predict the ultimate confined strain. Nonlinear regression analysis was conducted to propose expressions to predict the ultimate compressive strength and strain of HFRP-confined concrete. The proposed expressions resulted in good agreement with experimental results. An analytical procedure was proposed to predict the stress–strain curves of hemp-confined concrete constructed by partial replacement of natural coarse aggregates by recycled fired-clay brick aggregates. A close agreement was found between the experimental and analytically predicted stress–strain curves.

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Section: Introductionmentioning

confidence: 99%

Prediction of Stress–Strain Curves for HFRP Composite Confined Brick Aggregate Concrete under Axial Load

et al. 2023

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“…Recently, hemp confinement was utilized to enhance the compressive behavior of concrete made with brick waste 41 . Jirawattanasomkul et al 42 utilized jute, hemp, and cotton confinement to enhance mechanical properties of natural aggregate concrete.…”

Section: Introductionmentioning

confidence: 99%

Stress and strain relations of RC circular, square and rectangular columns externally wrapped with fiber ropes

Hussain,

Ruangrassamee,

Jirawattanasomkul

et al. 2024

Sci Rep

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This study explores the potential use of low-cost natural fiber reinforced rope polymers (FRRP) to improve the compressive behavior of circular, square, and rectangular reinforced concrete (RC) specimens. A total of 42 specimens were tested under monotonic axial compression in three groups. Groups were formed to differentiate specimens with different cross-sectional shapes such as circular, square, and rectangular. The findings demonstrate that FRRP can effectively boost the compressive behavior of RC columns. Circular specimens with three-layer hemp FRRP exhibited a 200% increase in compressive strength and a 270% improvement in corresponding strain. Cotton FRRP provided a 117% boost in compressive strength and a 233% enhancement in strain. In square specimens, three-layer hemp FRRP resulted in a 110% rise in compressive strength and a 186% increase in strain, while cotton confinement yielded improvements of 95% and 144%, respectively. For the square and rectangular specimens, the improvement in the compressive behavior was reduced compared to the circular specimens because of stress concentrations near corners. Moreover, the study showed that the hemp FRRP confinement outperformed the cotton confinement. The investigation also revealed that the existing analytical models were inadequate in predicting the mechanical properties of RC confined with natural FRRP. Therefore, the study introduces novel equations to predict the compressive strength and corresponding strain for both hemp and cotton confined concrete in various cross-sectional types. These proposed equations exhibit a good level of accuracy in predicting the compressive strength and corresponding strain.

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“…Natural coarse aggregates were replaced with recycled concrete aggregates as one solution for reducing the depletion of natural resources in various concrete applications [ 10 , 11 ]. Thus, the use of such agricultural by-products as a partial replacement for the components of the concrete mixture will allow not only the establishment of a large-scale, full-fledged and environmentally friendly process of recycling agricultural-production waste, but also a significant reduction in the cost of concrete, as well as a reduction in the use of non-renewable concrete components, due to their replacement with rapidly renewable natural analogues, which corresponds to the concept of sustainable development [ 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Walnut-Shell Additive on the Structure and Characteristics of Concrete

et al. 2023

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The partial replacement of the mineral components of concrete with natural renewable analogues in full possession of the performance characteristics of the final material, allows not only the concrete-production process to be made more environmentally friendly and inexpensive, but also to solve an important task for the agricultural industry, which is that associated with waste disposal. The scientific novelty of the work is in the obtaining of new concrete compositions by the partial replacement of coarse aggregate with a natural analogue in the form of a walnut shell, which has the maximum ratio of the strength of the composite to its density, as well as in identifying new dependencies of strength and density and their ratio on the amount of replacement of mineral coarse-aggregate walnut shell. The main goal of this article was to analyze the effect of composition factors on characteristics of concrete with partial replacement of large aggregates with walnut shells and to search for the optimal compound that would make it possible to obtain concrete with a minimum decrease in strength characteristics with a maximum decrease in concrete density. Cubes and prism laboratory samples were made from concrete of normal density with the replacement of coarse aggregate by 5, 10, 15, 20, 25 and 30%, by volume. The main mechanical properties, such as density, strength (compressive, tensile, tensile strength in bending) of the concrete samples were studied. The investigation used standard methods and scanning electron microscopy. An increase into strength characteristics up to 3.5%, as well as the maximum ratio of strength to density of concrete, was observed at a walnut-shell dosage of 5%. Effective partial replacement of coarse aggregate with walnut shells leads to a reduction in the consumption of crushed stone by up to 10% and a decrease in the mass of concrete by up to 6%.

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Sustainable and Low-Cost Hemp FRP Composite Confinement of B-Waste Concrete

Cited by 9 publications

References 65 publications

Prediction of Stress–Strain Curves for HFRP Composite Confined Brick Aggregate Concrete under Axial Load

Prediction of Stress–Strain Curves for HFRP Composite Confined Brick Aggregate Concrete under Axial Load

Stress and strain relations of RC circular, square and rectangular columns externally wrapped with fiber ropes

Effect of Walnut-Shell Additive on the Structure and Characteristics of Concrete

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