Steel/basalt rebar reinforced Ultra-High Performance Concrete components against methane-air explosion loads

Meng, Qingfei; Wu, Chengqing; Li, Jun; Liu, Zhongxian; Wu, Pengtao; Yang, Yekai; Wang, Zhongqi

doi:10.1016/j.compositesb.2020.108215

Cited by 30 publications

(10 citation statements)

References 45 publications

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“…The thickness of the concrete covering was 20 mm. As shown in Figure 2, the processes of formwork fabricating, steel bar tying, and reinforcement cage laying were all carried out at the Structural Laboratory of Guangdong ⃝ 6C32 indicates six HRB400 ribbed reinforcements with a 32 mm diameter, 2 ⃝ 2C18 indicates two HRB400 ribbed reinforcements with an 18 mm diameter, 3 ⃝ 2C8 indicates two HRB400 8 mm diameter double-leg stirrups, and 3 ⃝ 20C8 indicates twenty HRB400 8 mm diameter double-leg stirrups. As shown in Figure 2, the processes of formwork fabricating, steel bar tying, and reinforcement cage laying were all carried out at the Structural Laboratory of Guangdong University of Technology in Guangzhou, China.…”

Section: Specimen Preparationmentioning

confidence: 99%

“…Ultra-high-performance concrete (UHPC) is a cementitious composite consisting of cement, silica fume, quartz powder, fine aggregates, steel fibers, water reducer, and potable water. Given its excellent mechanical properties, superior workability, and durability, UHPC is considered one of the most promising engineering materials [1][2][3][4]. Additionally, UHPC exhibits excellent corrosion resistance and reliability due to its high compactness and self-healing ability [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…(a) Non-stirrup UHPC beams; (b) side elevation of (a); (c) stirrup-reinforced NC beams; and (d) side elevation of (c). Note: 1⃝ 6C32 indicates six HRB400 ribbed reinforcements with a 32 mm diameter,2 ⃝ 2C18 indicates two HRB400 ribbed reinforcements with an 18 mm diameter,3 ⃝ 2C8 indicates two HRB400 8 mm diameter double-leg stirrups, and3 ⃝ 20C8 indicates twenty HRB400 8 mm diameter double-leg stirrups.…”

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confidence: 99%

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Experimental Investigation on Shear Behavior of Non-Stirrup UHPC Beams under Larger Shear Span–Depth Ratios

Zhang,

Deng,

et al. 2024

Buildings

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Due to the extraordinary mechanical properties of ultra-high-performance concrete (UHPC), the shear stirrups in UHPC beams could potentially be eliminated. This study aimed to determine the effect of beam height and steel fiber volume content on the shear behavior of non-stirrup UHPC beams under a larger shear span–depth ratio (up to 2.8). Eight beams were designed and fabricated including six non-stirrup UHPC beams and two comparing stirrup-reinforced normal concrete (NC) beams. The experimental results demonstrated that the steel fiber volume content could be a crucial factor affecting the ductility, cracking strength, and shear capacity of non-stirrup UHPC beams and altering their failure modes. Additionally, the height of the beam had a considerable effect on its shear resistance. French standard formulae were more accurate for the UHPC beams with larger shear span–depth ratios, PCI-2021 formulae greatly overestimated the shear capacity of UHPC beams with larger shear span–depth ratios, and Xu’s formulae were more accurate for the steel fiber-reinforced UHPC beams with larger shear span–depth ratios. In summary, French standard formulae were the most suitable formulae for predicting the shear capacity of UHPC beams in this paper.

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Section: Specimen Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Experimental Investigation on Shear Behavior of Non-Stirrup UHPC Beams under Larger Shear Span–Depth Ratios

Zhang,

Deng,

et al. 2024

Buildings

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“…An advanced form of FRC is UHPC, which is composed of higher cement contents, superplasticizer (SP), fibers, silica fume, and other supplementary cementitious materials. The design of UHPC is a way to achieve dense packing of solid materials by limiting water content (w/c) below 0.2 (Meng et al, 2020). Such features result in UHPC's higher compressive strength, even more than 150 MPa (C/CM-17, 2017; Qin et al, 2022), which is almost 3-16 times more than conventional concrete (Yoo and Banthia, 2016;Xu S. et al, 2021), and excellent energy absorption capability and ductility.…”

Section: Basic Requirements Of Uhpcmentioning

confidence: 99%

An overview of progressive advancement in ultra-high performance concrete with steel fibers

et al. 2022

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A progressive advance in the construction sector is attained by employing ultra-high performance concrete (UHPC) technology. Rigorous efforts have been made in this research domain to have remarkable quality levels with 150 MPa or more strength and significant durability, which was impossible previously. Steel fiber incorporation in UHPC is vital in improving its mechanical characteristics. This review on the incorporation of steel fibers in UHPC evaluates, identifies, and synthesizes research outcomes for creating a summary of current evidence that can contribute to evidence-based practice. This study summarized a review of the literature on steel fibers’ effect on UHPC, intending to explore its essential aspects. The aim is to summarize the literature in this research domain and provide guidance for future research. Moreover, the basic requirements and materials, mixing and casting, mechanical properties, modern applications, advantages and disadvantages, and future perspectives associated with steel fibers reinforced UHPC in the construction sector are discussed. It is revealed from the conducted analysis that the most widely applied keyword is “steel fibers.” Due to the graphical illustration of the contributing studies, the current work may benefit academic scholars in sharing novel techniques and ideas and establishing collaborative efforts. Furthermore, the present work reveals that steel fibers have the potential to enhance the mechanical properties of UHPC; however, the large-scale production and applications of steel fiber-reinforced UHPC are controlled by parameters like fiber content and geometry.

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“…These connections integrated the separated elements as a whole with grout or late cast concrete (Ameli et al 2015), including pocket and socket connections, mechanical coupler connections, grouted duct connections and so on (Steuck et Rajchel 2019). Compared with conventional concrete, UHPC possesses superior performance in terms of both compressive and tensile properties, as well as durability and bond behavior (Huang et al 2019, Meng et al 2020). Therefore, this material provides as an alternative solution for the connection between pre-fabricated pier columns and foundations of bridges constructed with ABC techniques.…”

mentioning

confidence: 99%

Seismic performance of pre-fabricated segmental bridges with an innovative layered-UHPC connection

WANG

2022

Bull Earthquake Eng

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Ultra-high-performance concrete (UHPC) has been regarded as promising alternative to provide reliable connections between difference segments (e.g., columns and pier footing/cap) during accelerated bridge construction (ABC) procedures. This paper proposes an innovative layered-UHPC connection for the prefabricated segmental (PFS) pier, whose seismic performance was validated through quasi-static experiment. The corresponding design procedure for PFS pier with this type of connections is presented based on the test results. The layered-UHPC connection ensures the emulative performance of prefabricated bridge as cast-in-place (CIP) ones, as well as provides greater economic e ciency than traditional UHPC connections. Based on experimental results, key issues concerning this connection, including the tensile behavior of UHPC, height of connection region, thickness of UHPC layer and steel bars in grouting bed, are presented and discussed. Then a seismic design procedure is proposed utilizing the capacity protection philosophy widely adopted in design speci cations. The layered-UHPC connection is expected as capacity-protected component without damage, since it provides anchorage for steels extended from columns and pier cap/footing. While the pre-fabricated region is designed as ductile component undergoing nonlinearity during strong earthquakes. Following the detailed elaborations about the design philosophy, requirement and implementation steps, this procedure is further presented through illustration examples using PFS piers with various heights. The results show that PFS piers designed according to this procedure could meet the requirement under both frequent and rare earthquakes. Note that the PFS piers with this layered-UHPC connections could be designed similar to and emulative as CIP ones, which is believed friendly to designers in engineering practice.

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Steel/basalt rebar reinforced Ultra-High Performance Concrete components against methane-air explosion loads

Cited by 30 publications

References 45 publications

Experimental Investigation on Shear Behavior of Non-Stirrup UHPC Beams under Larger Shear Span–Depth Ratios

Experimental Investigation on Shear Behavior of Non-Stirrup UHPC Beams under Larger Shear Span–Depth Ratios

An overview of progressive advancement in ultra-high performance concrete with steel fibers

Seismic performance of pre-fabricated segmental bridges with an innovative layered-UHPC connection

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