Highly thixotropic ultra-high-performance concrete (UHPC) as an overlay

Du, Jiang; Guo, Pengwei; Liu, Zhuo; Meng, Weina

doi:10.1016/j.conbuildmat.2022.130130

Cited by 18 publications

(5 citation statements)

References 72 publications

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“…Bridge deck concrete decks are subjected to a high risk of concrete cracking and reinforcement corrosion during their service life, especially under dynamic vehicular loads and environmental conditions [ [1] , [2] , [3] , [4] ]. Improving the structural performance using the bonded overlay either to rehabilitate or strengthen the original bridge deck system [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of overlay strength degradation on bond stresses of bridge deck system

Al-Rousan,

Alnemrawi

2024

Heliyon

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Section: Introductionmentioning

confidence: 99%

Influence of overlay strength degradation on bond stresses of bridge deck system

Al-Rousan,

Alnemrawi

2024

Heliyon

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“…Nowadays, the perspectives of researchers shifted from using recycled materials to produce normal concrete to producing high performance and ultrahigh-performance concrete using recycled wastes, e.g. [1][2][3]. The Federal Highway Administration (FHWA) in the United States defines the UHPC as concrete having compressive strength greater than 125 MPa with improved durability and enhanced tensile ductility [4].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Ultra High Performance Concrete Manufactured with Recycled Steel Fiber

Elrefaei,

Alsaadawi,

Elshafiey

et al. 2024

Advances in Science and Technology

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This study investigated the rheological properties and impact resistance of ultra-high-performance concrete (UHPC) enhanced by using waste steel fibre (WSF) extracted from waste tires. The experimental program involved testing five different percentages of WSF to fortified UHPC, which were produced to illustrate how WSF affected the rheological properties of UHPC. The five different percentages of WSF were of 0.3 %, 0.45%, 0.6%, 1.05% and 1.35% by volume of concrete. Both hardened and fresh properties, such as unit weight, compressive strength, slump, flexural strengths, indirect tensile strength (IDT), and impact resistance of UHPC were analyzed, and the results showed that Compressive strength, IDT, and Flexural increased by 49 %, 79 %, and 40 % for mixtures containing 1.35 % waste steel fibre, respectively. The UHPC mixes also showed significant higher impact resistance compared with conventional mix.

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“…Cementitious materials are usually composed of cement, silica fume, fly ash, mineral powder, etc. In addition, UHPC is also mixed with high-strength steel fibers, which can significantly improve the toughness and tensile resistance of concrete [2]. The application of UHPC in engineering can effectively reduce the self-weight of a structure while improving the ductility of the structure, and UHPC with excellent performance is increasingly used in roads, bridges, and long-span projects [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…SG inhibits the hydration of tricalcium silicate (C 3 S), that is, gluconate can inhibit the hydration of C 3 S by adsorbing on the dissolution site on the silicate phase surface [12][13][14], reducing the cumulative hydration heat and hydration rate of cement, prolonging the induction period and retarding setting. (2) Regarding complexation inhibition, another view on the SG retardation mechanism is that the adsorption of SG or the complexation between SG and Ca 2+ inhibits the formation of ettringite (AFt) [13,15]. (3) Regarding the inhibition of gypsum dissolution, the formation of AFt is related to CaSO 4 •2H 2 O, and SG delays the formation of AFt by preventing the dissolution of CaSO 4 •2H 2 O [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sodium Gluconate on Properties and Microstructure of Ultra-High-Performance Concrete (UHPC)

Yuan

Niu

et al. 2023

Materials

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The properties of concrete can be significantly affected by sodium gluconate (SG) at very small dosages. In this paper, the effects of SG on the fluidity, setting time, heat of hydration, and strength of ultra-high-performance concrete (UHPC) were studied. The results show that (1) in the plastic stage, SG inhibited the formation of early ettringite (AFt) and delayed the hydration of tricalcium silicate (C3S) and dicalcium silicate (C2S). SG increased the initial fluidity of UHPC without decreasing within 1 h. When the SG dosage was ≥0.06%, the slumps at 30 min and 60 min increased slightly. (2) In the setting hardening stage, the addition of SG inhibited the formation of calcium hydroxide (CH), which significantly extended the setting time of UHPC. When the dosage of SG was 0.15%, the initial and final setting times were 5.0 times and 4.5 times that of the blank group, respectively. SG had no obvious effect on the hydration rate of cement in the accelerated period, but the peak hydration temperature of UHPC was increased when the SG dosage was 0.03~0.12%. (3) In the strength development stage, the 1 d and 3 d strength of UHPC decreased significantly with the increase in the SG dosage. However, SG could promote the formation of AFt at the pores and aggregate interface in the later stage, reduce the porosity of cementite, and improve the compressive strength of UHPC in 28 d, 60 d, and 90 d. When the SG dosage was 0.12%, the 90d strength increased by 13%.

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Highly thixotropic ultra-high-performance concrete (UHPC) as an overlay

Cited by 18 publications

References 72 publications

Influence of overlay strength degradation on bond stresses of bridge deck system

Influence of overlay strength degradation on bond stresses of bridge deck system

Performance Evaluation of Ultra High Performance Concrete Manufactured with Recycled Steel Fiber

Effect of Sodium Gluconate on Properties and Microstructure of Ultra-High-Performance Concrete (UHPC)

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