Recent trends in ultra-high performance concrete (UHPC): Current status, challenges, and future prospects

Amran, Mugahed; Huang, Shanglian; Onaizi, Ali M.; Makul, Natt; Abdelgader, Hakim S.; Ozbakkaloglu, Togay

doi:10.1016/j.conbuildmat.2022.129029

Cited by 148 publications

(32 citation statements)

References 276 publications

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“…UHPC is a relatively new cementitious ductile composite material with ultra-high strength, good dimensional stability, and excellent durability. [96][97][98][99] UHPCs do not contain coarse aggregates in their composition. Still, they have high dosages of cement, pozzolanic materials, sand, quartz powder, SP, and ST fiber with a meager water-binding ratio.…”

Section: Resultsmentioning

confidence: 99%

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The single and hybrid use of steel and basalt fibers on high‐temperature resistance of sustainable ultra‐high performance geopolymer cement mortars

Güler

Akbulut

2023

Structural Concrete

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This paper primarily examines the flowability, physical appearance, mass loss, residual compressive strength (RCS), and residual flexural strength (RFS) properties of steel (ST) and basalt (BA) fiber-added sustainable ultra-high performance geopolymer cement (UHPGPC) mortars exposed to hightemperature effects. According to the results obtained, ST and BA fibers adversely influence the workability properties of UHPGPC mortars and thus significantly reduce the spreading diameters of the mortars. However, ST and BA fibers substantially improve the RCS and RFS capacities of UHPGPC specimens exposed to high temperatures because they have a powerful bonding effect with the matrix and effectually restrict the development of micro-and macro-cracks with their bridging effect. Furthermore, this phenomenon is slightly more effective in hybrid form than using ST and BA fibers.

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Section: Resultsmentioning

confidence: 99%

“…Compared to conventional concretes, UHPCs have higher strength and durability properties. UHPC is a relatively new cementitious ductile composite material with ultra‐high strength, good dimensional stability, and excellent durability 96–99 . UHPCs do not contain coarse aggregates in their composition.…”

Section: Resultsmentioning

confidence: 99%

The single and hybrid use of steel and basalt fibers on high‐temperature resistance of sustainable ultra‐high performance geopolymer cement mortars

Güler

Akbulut

2023

Structural Concrete

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“…This material has the advantages of having a relatively small weight, making work more accessible and practical, and having good strength. The disadvantages of this type of material are the order grace period and the danger of corrosion (Amran et al, 2022).…”

Section: With Steel Materialsmentioning

confidence: 99%

Design of Leading Type Retaining Walls: Case Study in Perumnas IV Padang Bulan, Jayapura City

Chandra¹,

Wayangkau²,

Gifary³

2023

IJSOC

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Jayapura City is one of the Papua Province’s capital cities with an increasing population. One of the areas in Jayapura City, especially Perumnas IV Padang Bulan, is surrounded by hills. Infrastructure development in the densely packed Perumnas IV Padang Bulan area and increasingly narrow land has forced the local community to build infrastructure under the foot of the hills. Infrastructure development under the foot of the mountains is very prone to landslides or soil movement. There is a retaining wall planned so that the movement of the soil is restrained by the retaining wall so that no landslides occur, which endanger the community in the Perumnas IV Padang Bulan area. From a survey of the Perumnas IV Padang Bulan area in the form of topographic data and cone penetration data (CPT), contour data and cone penetration results (CPT) data were obtained for QC and fs values, then soil type classification was carried out with empirical correlation approaches, then active earth pressure calculations were carried out and passive from Rankine’s theory. As well as planning a safe leaning type retaining wall. From the results of the planning that has been done, the plan obtained is a leaning type retaining wall with concrete material, the height of the retaining wall reaches 3.1 meters, and the width of the foundation is 2 meters. Safe against overturning, shearing, and soil-bearing capacity.

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“…Presently, with the rapid development of modern precision-guided weapons and robust Earth penetrating weapons, the protective structures for high-value military targets are facing ever increasing threats and challenges, which have to bear intense dynamic impact in addition to static loads. Among all the used concrete materials, ultra-high performance concrete (UHPC) is considered to be the most prospective structural materials in both large civil infrastructure and military protective applications [1][2][3][4][5]. Differing from ordinary concrete with typical brittleness characteristics, UHPC attracts the wide attention of researchers owing to ultrahigh compressive strength, superior durability and better toughness.…”

Section: Introductionmentioning

confidence: 99%

Hybrid effects of carbon nanotubes and steel fiber on dynamic mechanical properties of ultra-high performance concrete

Yan²,

Ma³

et al. 2023

Mater. Res. Express

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This study aims to investigate the hybrid effects of carbon nanotubes (CNTs) and steel fiber (SF) on dynamic mechanical behavior of ultra-high performance concrete (UHPC) under the high-speed dynamic loading effects. The functionalized CNTs content varied from 0.0% to 0.20%, and SF volume content was added from 0.5% to 2.0%. The UHPC specimens were tested at strain rates ranging from about 60 s-1 to 240 s-1 using the split Hopkinson pressure bar. The dynamic behavior of specimens was evaluated in terms of stress–strain relationships, energy absorption capacity and failure patterns. Test results show that dynamic compressive properties of UHPC are strongly sensitive to strain rates. The individual addition of CNTs obviously improves the dynamic performance of plain UHPC, and there exists an optimal CNTs content of about 0.10% to achieve better improvement effects. The dynamic increase factor (DIF) is almost unrelated to CNTs content but closely correlated to strain rate variations, which can be well described by a modified empirical formula. Furthermore, it is found that the hybrid CNTs and SF display more significant reinforcing effects on dynamic properties of UHPC, as the UHPC specimen with 0.10% CNTs and 2.0% SF exhibits the highest dynamic compressive strength and toughness. Meanwhile, UHPC reinforced by hybrid fibers is less sensitive to high strain rates compared to plain UHPC. From microscopic observations, it is reasonably believed CNTs and SF exert synergistic reinforcing effects on UHPC matrix in view of their respective characteristics, which are more significant in improving the interfacial transition zone (ITZ) structure between SF and the surrounding matrix. This work promotes a fundamental understanding for the reinforcing effects of CNTs on UHPC, and provides an effective strategy to reinforce UHPC from multiscale perspectives.

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Recent trends in ultra-high performance concrete (UHPC): Current status, challenges, and future prospects

Cited by 148 publications

References 276 publications

The single and hybrid use of steel and basalt fibers on high‐temperature resistance of sustainable ultra‐high performance geopolymer cement mortars

The single and hybrid use of steel and basalt fibers on high‐temperature resistance of sustainable ultra‐high performance geopolymer cement mortars

Design of Leading Type Retaining Walls: Case Study in Perumnas IV Padang Bulan, Jayapura City

Hybrid effects of carbon nanotubes and steel fiber on dynamic mechanical properties of ultra-high performance concrete

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