UHPC evolution, development, and utilization in construction: a review

Bajaber, M. A.; Hakeem, Ibrahim Y.

doi:10.1016/j.jmrt.2020.12.051

Cited by 225 publications

(64 citation statements)

References 65 publications

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“…For example, it has strong resistance to water permeability, chloride penetration, freeze and thaw, and chemical attack because of its great material properties. Comprehensive studies on UHPC have been conducted for the last few decades such as the rheological properties of a fresh paste of UHPC [15][16][17][18][19][20], the effect of fibers [16,19,[21][22][23], mix design [24][25][26][27][28][29], and structural applications [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

The Role of Supplementary Cementitious Materials (SCMs) in Ultra High Performance Concrete (UHPC): A Review

Park

Liu

et al. 2021

Materials

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Although ultra high-performance concrete (UHPC) has great performance in strength and durability, it has a disadvantage in the environmental aspect; it contains a large amount of cement that is responsible for a high amount of CO2 emissions from UHPC. Supplementary cementitious materials (SCMs), industrial by-products or naturally occurring materials can help relieve the environmental burden by reducing the amount of cement in UHPC. This paper reviews the effect of SCMs on the properties of UHPC in the aspects of material properties and environmental impacts. It was found that various kinds of SCMs have been used in UHPC in the literature and they can be classified as slag, fly ash, limestone powder, metakaolin, and others. The effects of each SCM are discussed mainly on the early age compressive strength, the late age compressive strength, the workability, and the shrinkage of UHPC. It can be concluded that various forms of SCMs were successfully applied to UHPC possessing the material requirement of UHPC such as compressive strength. Finally, the analysis on the environmental impact of the UHPC mix designs with the SCMs is provided using embodied CO2 generated during the material production.

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Section: Introductionmentioning

confidence: 99%

The Role of Supplementary Cementitious Materials (SCMs) in Ultra High Performance Concrete (UHPC): A Review

Park

Liu

et al. 2021

Materials

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“…Some scholars have discovered that the utilization of steel fiber high strength concrete (SFHSC) with low strength (around 80 MPa) in steel-concrete joints could effectively compensate for the defects of convention concrete and UHPC [ 20 , 21 ]. SFHSC with the strength between conventional concrete and UHPC has a more convenient construction process and less autogenous shrinkage deformation than UHPC and superior mechanical and durability properties than conventional concrete [ 22 , 23 ]. Moreover, the reliable bond between steel fibers and concrete can inhibit the cracking and damage of concrete structures and enhance the elastic deformation capacity of concrete, thus greatly improving the shear resistance as well as the ductility of concrete structures [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Mechanical Properties of Perfobond Rib Shear Connectors with Steel Fiber High Strength Concrete

Liu

Xue

et al. 2021

Materials

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Perfobond rib (PBL) shear connectors, made up of the perforated steel plates with the penetrating rebars passing through the holes, are extensively adopted in steel-concrete composite structures for their excellent performance. The adequate understanding of mechanical properties for PBL connectors is of great significance for their reasonable design. In this study, a push out experiment, including 12 specimens with the parameters of concrete strength, diameter of penetrating rebars and the number of holes on perforated steel plate, was performed to explore the mechanical behavior of PBL connectors with steel fiber high strength concrete (SFHSC). The experimental results showed that the shear capacity of the PBL connectors increased with the increase in concrete strength, diameter of the penetrating rebars and the number of holes. Furthermore, a general prediction formula for the shear capacity of PBL connectors was developed, which considers the shear contribution of concrete dowels, concrete end-bearing, interfacial bonding between the perforated steel plates and concrete and the penetrating rebars as well as the enhancement effect of steel fibers. The prediction results of the equation are in good agreement with the experimental data and could provide a reference for the design of PBL connectors.

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“…UHPC, also known as reactive powder concrete, is formulated by combining Portland cement, supplementary cementitious materials, and reactive powders or fibers [5,6]. The matrix of UHPC is dense and has a minimal disconnected pore structure resulting in low permeability, superior durability, and compressive strength [7,8]. The inclusion of fibers in UHPC facilitates higher bond strength to enhance tensile and ductile behavior [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…The matrix of UHPC is dense and has a minimal disconnected pore structure resulting in low permeability, superior durability, and compressive strength [7,8]. The inclusion of fibers in UHPC facilitates higher bond strength to enhance tensile and ductile behavior [8][9][10]. UHPC is used in precast components for construction, bridge components, and other special construction projects.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Incorporating Ultra-Fine Spherical Particles on Rheology and Engineering Properties of Commercial Ultra-High-Performance Grout

et al. 2021

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In this study, ultra-fine spherical particles of silica fume and reactive ultra-fine fly ash were added to a mixture of commercial ultra-high-performance grout (UHPG) with the aim of enhancing the rheological properties, compressive strength, compactness, and permeability. This commercial UHPG study was conducted in collaboration with Triaxis Corporation (Changsha city, Hunan province, China). A water-to-binder ratio of 0.21 and a binder-to-fine aggregates ratio of 1.17 were used as fixed parameters, and the binders were a combination of type-II Portland cement, sulphoaluminate cement, silica fume, and reactive ultra-fine fly ash (RUFA). Polycarboxylate superplasticizer powder was used to control the rheology. The results revealed excellent compressive strength, volume stability, and resistance to chloride penetration. Mercury intrusion porosimetry and scanning electron microscopy tests revealed that the medium-sized RUFA particles with small silica fume particles completely filled the spaces between large cement particles to achieve optimal densification. This mixture also produced dense hydration and calcium-silicate-hydrates colloids, which filled the microstructures of the UHPG resulting in excellent engineering properties and durability. This commercially available UHPG mix responded to excellent compressive strengths approaching 120 MPa and exhibited good workability with a loss of slump-flow rate up to 33% after 60 min. It also exhibited very low abrasion resistance (0.5%), stable shrinkage and expansion rates (stabilization over 10 days), very low chloride diffusion coefficient (less than 0.1 × 10−14 m2/s) with a denser microstructure. This commercial UHPG (UHPG-120) has been developed to meet the needs of the market.

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UHPC evolution, development, and utilization in construction: a review

Cited by 225 publications

References 65 publications

The Role of Supplementary Cementitious Materials (SCMs) in Ultra High Performance Concrete (UHPC): A Review

The Role of Supplementary Cementitious Materials (SCMs) in Ultra High Performance Concrete (UHPC): A Review

Experimental Study on the Mechanical Properties of Perfobond Rib Shear Connectors with Steel Fiber High Strength Concrete

The Effect of Incorporating Ultra-Fine Spherical Particles on Rheology and Engineering Properties of Commercial Ultra-High-Performance Grout

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