Effect of compression casting method on the axial compressive behavior of FRP-confined seawater sea-sand concrete columns

Yuan, Fang; Song, Jin-Gyu; Wu, Yufei

doi:10.1016/j.engstruct.2023.116311

Cited by 28 publications

(7 citation statements)

References 35 publications

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“…Moreover, the hoop strain at any given axial strain decreases with increasing number of layers of FRP sheets [29,43]. For CFRP-confined compression-casted SWSSC, the peak stress was higher and ultimate strain was lower than the normally casted CFRP-confined SWSSC [63]. If recycled aggregates are to be used in FRP sheet confinement, the ultimate strength decreases, and ultimate strain increases with increasing recycled aggregate content.…”

Section: Swssc Confined By Frp Wrappingmentioning

confidence: 97%

“…Additionally, with an increasing number of layers of wrapping for a constant value of clear spacing between two adjacent strips, the confinement effect is intensified, and it is indicated by severe concrete spalling after the failure of CFRP strips. As the microstructure of compression casted SWSSC is denser than normally casted SWSSC, the failure of confined specimens was observed to be more brittle, and the ultimate axial strain was weakened [63].…”

Section: Swssc Confined By Frp Wrappingmentioning

confidence: 99%

“…The effect of compression casting technique on confined SWSSC was investigated by Yuan et al [63]. By applying a compressive stress of 15 MPa for 2 min on freshly mixed concrete through a special casting device, the compressive strength and density of control SWSSC were improved by 38% and 7%, respectively.…”

Section: Properties Of Swssc Used In Confinement Studiesmentioning

confidence: 99%

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Review of the Short-Term Properties of Confined Seawater Sea Sand Concrete Columns under Compression

Shrivastava,

Ramli Sulong,

Zahra

et al. 2024

Buildings

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The environmental concerns raised by the over-exploitation of fresh water and river sand have driven researchers to explore seawater sea sand concrete (SWSSC) as a substitute for conventional concrete in structural columns. With numerous investigations on this in the past, there is a need to systematically classify and comprehensively understand the response of confined SWSSC columns to promote their usage as structural columns. Consequently, the objective of this review is to summarise and analyse the experimental work conducted so far on confined SWSSC under different compressive loadings. Confined SWSSC columns are classified into five confinement schemes based on the cross-section of the specimens: single-skin, single-skin multilayered, single-skin with additional reinforcement, double-skin, and double-tube-confined SWSSC columns. Based on the findings of the reviewed studies, it can be concluded that the compressive strength and the ductility of the SWSSC can be enhanced through confinement, with effectiveness majorly depending on the material and geometrical properties of the confinement providing material. The existing research work on SWSSC confinement lays out a strong base for future investigations in this area, which will eventually facilitate the acceptance of SWSSC as structural columns, especially for coastal and marine infrastructure.

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Section: Swssc Confined By Frp Wrappingmentioning

confidence: 97%

Section: Swssc Confined By Frp Wrappingmentioning

confidence: 99%

Section: Properties Of Swssc Used In Confinement Studiesmentioning

confidence: 99%

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Review of the Short-Term Properties of Confined Seawater Sea Sand Concrete Columns under Compression

Shrivastava,

Ramli Sulong,

Zahra

et al. 2024

Buildings

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“…The cylinder diameter sizes cover 51 mm-508 mm. Besides the conventional concrete made by ordinary Portland cement (OPC concrete), test points containing coal gangue concrete [13], gangue ceramsite concrete [18] and seawater sea-sand concrete [15,19] are gathered herein. It can be seen that the experimental data is comprehensive although the source shows dispersion in some degree.…”

Section: Evaluation and Performance For Models Of Frp-confined Concre...mentioning

confidence: 99%

Evaluation of Ultimate Axial Strain Models for Fiber-Reinforced Polymer-Confined Concrete Cylinders

Chen,

Wang,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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Fiber-reinforced polymer (FRP) composite has been widely applied to reinforce and rehabilitate concrete columns in civil engineering. It is necessary to deeply understand the ultimate deformation (i.e., the ultimate axial strain εcc ) of FRP-confined concrete columns. A large database including different types of FRP (conventional FRP and large-rupture-strain FRP), concrete compressive strengths (19.4 MPa-169.7 MPa), and cylinder sizes (51 mm-508 mm), as well as various concrete types, is collected in this study. For this reason, several existing ultimate axial strain modes for FRP-confined cylinders have been evaluated via some statistical parameters based on the database. The verification results illustrate that the prediction accuracy of axial strain models is not good enough due to the intrinsic difficulty in predicting deformation and variability of data source, although the available models with better performance can achieve the average ratio between experimental and predicted strain value ( ε c c exp e / ε c c pred ) below 10%.

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“…When the solution reaches saturation, the aluminosilicate gel is formed and precipitated. A new gel is formed due to the increase in the amount of silicon dissolved in the solution, and the silicon enriches the aluminosilicate gel [ 17 , 18 ]. In addition, the strong binding property and low porosity of various geopolymer mixtures make geopolymers ideal materials for use in marine environments.…”

Section: Introductionmentioning

confidence: 99%

Experiment on Compressive Properties and Microscopic Analysis of Sea Sand Geopolymer-Based Recycled Concrete

Xu,

An,

Chen

et al. 2023

Materials

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For marine and coastal engineering, construction resources have become scarce due to a limited local supply. Sea sand geopolymer-based recycled concrete (SSGRC) is an innovative cementitious material known for its eco-friendly benefits and corrosion resistance. This study explores the mechanical properties of SSGRC. The influences of the replacement rate of mineral slag, alkali activator concentrations, fine aggregate types, and curing ages on the compression strength of SSGRC were studied. The failure mechanism was analyzed using the failure patterns and compressive stress–strain curves. The results show that sea sand had a positive effect on geopolymer-based material. The SSGRC reached peak strength with an alkali activator concentration of 10 mol/L and a mineral slag replacement rate of 60%. The maximum stress and strain increased with an increasing curing age. The ratios of strength to the peak value were 55% and 85% after 1 day and 7 days, respectively. Using SEM, in the last hydration stage, the C-(A)-S-H gel was formed with a dense microstructure, and the geopolymer exhibited a favorable bonding performance. The constitutive models describing the complete stress–strain relationship under compression were developed.

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Effect of compression casting method on the axial compressive behavior of FRP-confined seawater sea-sand concrete columns

Cited by 28 publications

References 35 publications

Review of the Short-Term Properties of Confined Seawater Sea Sand Concrete Columns under Compression

Review of the Short-Term Properties of Confined Seawater Sea Sand Concrete Columns under Compression

Evaluation of Ultimate Axial Strain Models for Fiber-Reinforced Polymer-Confined Concrete Cylinders

Experiment on Compressive Properties and Microscopic Analysis of Sea Sand Geopolymer-Based Recycled Concrete

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