Study on bond performance between FRP bars and seawater coral aggregate concrete

Yang, Shutong; Yang, Chao; Huang, Mei-Lin; Liu, Yang; Jiang, Jitong; Fan, Guoxi

doi:10.1016/j.conbuildmat.2018.04.015

Cited by 125 publications

(31 citation statements)

References 20 publications

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“…In the present study, ARGF reinforced CAC (ARGF-CAC) is mixed by seawater, cement, ground granulated blast furnace slag (GGBFS), Class F fly ash (FA), metakaolin (MK), coral aggregates, and ARGF according to the literature [19]. All of the water used in the test is artificial seawater simulating the water in South China Sea [13]. Ordinary Portland cement (P.O.…”

Section: Raw Materialsmentioning

confidence: 99%

“…Because of the high water absorption and irregular shapes of coral aggregates [10], the workability of fresh coral aggregate concrete (CAC) is reduced. However, the early strength develops faster than that of ordinary concrete due to the chloride effects transferred from seawater and coral aggregates [11][12][13][14]. The seven-day strength even exceeds 80% of the 28-day strength [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…However, the early strength develops faster than that of ordinary concrete due to the chloride effects transferred from seawater and coral aggregates [11][12][13][14]. The seven-day strength even exceeds 80% of the 28-day strength [13,14]. Besides, the coral aggregates generally have sufficient bond performance with the surrounding paste and the interfacial transition zones are hardly detected [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, because both the seawater and coral aggregates may have high saline content, steel bar cannot be effectively used in reinforced CAC structures. Fiber-reinforced polymer (FRP), as a non-metallic material, can be used instead of steel in CAC structures [13,17,21,22], due to its high resistance to chloride corrosion. Yang et al [13] analyzed the bond behavior between CAC and FRP bars with different FRP types, diameters, surface types, bond lengths, and curing conditions.…”

Section: Introductionmentioning

confidence: 99%

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Properties of Alkali-Resistant Glass Fiber Reinforced Coral Aggregate Concrete

Yang

Dong

et al. 2020

Materials

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The intention of this paper is to analyze the properties of coral aggregate concrete (CAC) that is reinforced by alkali-resistant glass fibers (ARGF) and the bond performance with BFRP (basalt fiber reinforced polymer) bars. Two types of ARGF, denoted by Type A and Type B with different manufacturing technologies and fiber lengths, are used in the test. Tests of compressive strength, splitting tensile strength, and flexural performance were performed on ARGF-CAC with four different contents for the two types of ARGF. It is found that the cubic compressive strength is slightly reduced when the fiber volume fraction exceeds 0.5%, but almost keeps invariable if the fiber content further increases. However, the tensile strength, residual strength retention and flexural toughness are improved as more ARGFs are added into CAC, and even higher with Type B ARGF addition. The optimized volume fraction is 1.5% for both the two types of ARGF based on the evaluation of the workability and mechanical performance. Moreover, central pull-out test was performed to study the bond properties of ARGF-CAC with BFRP bars. It is found that both the maximum average bond stress and residual frictional stress are generally reduced as the bond length is longer. The addition of Type B ARGFs can significantly improve the bond strength; however, the Type A ARGFs seem to have marginal effect.

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Section: Raw Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Properties of Alkali-Resistant Glass Fiber Reinforced Coral Aggregate Concrete

Yang

Dong

et al. 2020

Materials

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“…The coral reef has been mostly used as aggregate in cement concrete since coral aggregate occupies 75% of concrete by weight to save cost [ 3 , 4 ]. The investigations on the mix proportion, physical and mechanical properties, and durability especially in chloride permeability and rebar corrosion of coral concrete were carried out [ 5 , 6 , 7 , 8 ]. Research results show that coral concrete has lower compressive strength, higher porosity, larger shrinkage, and poor corrosion resistance compared to conventional cement concrete [ 5 , 6 , 7 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Study of Hydration and Microstructure of Mortar Containing Coral Sand Powder Blended with SCMs

Shen

et al. 2020

Materials

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The utilization of coral waste is an economical way of using concrete in coastal and offshore constructions. Coral waste with more than 96% CaCO3 can be ground to fines and combined with supplementary cementitious materials (SCMs) such as fly ash, silica fume, granulated blast furnace slag in replacing Portland cement to promote the properties of cement concrete. The effects of coral sand powder (CSP) compared to limestone powder (LSP) blended with SCMs on hydration and microstructure of mortar were investigated. The result shows CSP has higher activity than LSP when participating in the chemical reaction. The chemical effect among CSP, SCMs, and ordinary Portland cement (OPC) results in the appearance of the third hydration peak, facilitating the production of carboaluminate. CSP-SCMs mortar has smaller interconnected pores on account of the porous character of CSP as well as the filler and chemical effect. The dilution effect of CSP leads to the reduction of compressive strength of OPC-CSP and OPC-CSP-SCMs mortars. The synergic effects of CSP with slag and silica fume facilitate the development of compressive strength and lead to a compacted isolation and transfer zone (ITZ) in mortar.

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Verbundverhalten umwickelter CFK‐Stäbe in Beton – Kurzzeituntersuchung der Verbundeigenschaften mittels Pull‐out‐Tests

Hammerl¹,

Stoiber²,

Hämmerle³

et al. 2021

Beton und Stahlbetonbau

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Der Einsatz und die Verfügbarkeit von Bewehrung aus Carbonfaserverbundkunststoff (CFK) steigen stetig, weshalb ein umfangreiches Verständnis der Verbundeigenschaften essenziell ist. Die vorliegende Publikation gibt einen Überblick über unterschiedliche Ausführungsformen von CFK‐Stäben sowie über den Einfluss von ausgewählten Parametern auf das Verbundverhalten. Der Fokus wurde auf Stäbe mit straffer Umwickelung aus CFK‐Fasersträngen gelegt und die Konkurrenzfähigkeit im Vergleich zu anderen, beispielsweise subtraktiv bearbeiteten, eingefrästen Stäben wird aufgezeigt. In 84 Ausziehversuchen wurde das Verbundverhalten von umwickelten CFK‐Stäben in vier Betonarten getestet. Bei den untersuchten Stäben wurden dabei die Wendelbreite und ‐dicke, die Wendelsteigung, der Wendelabstand und der Stabdurchmesser variiert. Die Versuchsergebnisse werden in Verbundspannungs‐Schlupfdiagrammen präsentiert, verglichen und abschließend diskutiert.

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Study on bond performance between FRP bars and seawater coral aggregate concrete

Cited by 125 publications

References 20 publications

Properties of Alkali-Resistant Glass Fiber Reinforced Coral Aggregate Concrete

Properties of Alkali-Resistant Glass Fiber Reinforced Coral Aggregate Concrete

Study of Hydration and Microstructure of Mortar Containing Coral Sand Powder Blended with SCMs

Verbundverhalten umwickelter CFK‐Stäbe in Beton – Kurzzeituntersuchung der Verbundeigenschaften mittels Pull‐out‐Tests

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