Influence in the mechanical properties and salt erosion resistance of recycled sand UHPC made from fly ash content

Chenjie, Wu; Zhipeng, Ma; Dezhi, Wang; Haiwei, Zhang; Long, Ke; Yu, Lu

doi:10.1016/j.jobe.2024.110337

Journal of Building Engineering

2024

DOI: 10.1016/j.jobe.2024.110337

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Influence in the mechanical properties and salt erosion resistance of recycled sand UHPC made from fly ash content

Wu Chenjie,

Ma Zhipeng,

Wang Dezhi

et al.

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2024

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Cited by 2 publications

References 30 publications

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Life-cycle environmental assessment of ultra-high-performance concrete with sustainable materials and fiber substitutions

Farahzadi,

Tellnes,

Shafei

et al. 2024

Cleaner Engineering and Technology

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Life-cycle environmental assessment of ultra-high-performance concrete with sustainable materials and fiber substitutions

Farahzadi,

Tellnes,

Shafei

et al. 2024

Cleaner Engineering and Technology

View full text Add to dashboard Cite

Impact of Graphite-Associated Waste as a Sustainable Aggregate on UHPC Performance

Jiang,

Li,

Yang

et al. 2024

Sustainability

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In this study, graphite tailings produced in Luobei County, Heilongjiang Province, were used as a sustainable aggregate to replace river sand (0%, 25%, 50%, 75%, 100%) in UHPC for the preparation of ultra-high-performance concrete (UHPC). The experimental results showed that the incorporation of 75% graphite tailings caused a significant increase in the wet bulk density of UHPC mortar. The workability of UHPC decreased monotonically with the increase in graphite tailing substitution rate, and wet bulk density decreased by 28.42% with 100% graphite tailings (compared with no graphite tailings). The incorporation of 75% graphite tailings helped to improve the compressive and flexural strengths as well as the durability of UHPC. Compared with the UHPC without graphite tailings, the 28 d compressive and flexural strengths increased by 8.82% and 7.28%, respectively, and the chloride ion electrical flux decreased by 19.49%. XRD and thermogravimetric analysis data indicate that the incorporation of graphite tailings did not change the type of hydration and that the incorporation of graphite tailings helped to increase the degree of hydration within the UHPC matrix. MIP and SEM showed that 75% graphite tailings helped to reduce the porosity and the number of harmful pores inside the matrix. The 100% graphite tailings treatment replacing river sand decreased the economic cost of UHPC by up to 23.78%.

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Influence in the mechanical properties and salt erosion resistance of recycled sand UHPC made from fly ash content

Cited by 2 publications

References 30 publications

Life-cycle environmental assessment of ultra-high-performance concrete with sustainable materials and fiber substitutions

Life-cycle environmental assessment of ultra-high-performance concrete with sustainable materials and fiber substitutions

Impact of Graphite-Associated Waste as a Sustainable Aggregate on UHPC Performance

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