Application of nanomaterials in ultra-high performance concrete: A review

Liu, Changjiang; He, Xin; Deng, Xiaowei; Wu, Yuyou; Zheng, Zhao; Liu, Jian; Hui, David

doi:10.1515/ntrev-2020-0107

Cited by 78 publications

(26 citation statements)

References 97 publications

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“…In the current period, the use of NMs has expanded in all industry sectors, including concrete technology. The manufacture of nanoparticles is possible with a microscopic particle size measured in nanometers (μm) less than 100 nm with specific properties in various applications 43 . Nanotechnology is an evolving field related to nanoscale control.…”

Section: Introductionmentioning

confidence: 99%

“…Lee et al reported that adding 2.32% of nano‐TiO 2 to the cement block improved the compressive and flexural strengths by 18.05% and 47.07%, respectively, at the test age of 28 days 64 . In addition, adding nano‐TiO 2 to UHPC has contributed to reducing the dry shrinkage rate and improving frost, chloride penetration, and carbonization resistance 43 . The size and distribution of nanoparticles within the modified cement binder affect the efficiency of these compounds 68 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of modified nano‐titanium and fly ash on ultra‐high‐performance concrete properties

Ghanim

Amin

Zeyad

et al. 2023

Structural Concrete

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This paper aims to study the effect of using modified nano‐TiO2 with fly ash (FA) on ultra‐high performance concrete's (UHPC) mechanical, transport, and microstructure properties (UHPC). A ball mill was used to disband the nano‐TiO2 and distribute it uniformly within the FA powder. In this research, 20% of the cement weight was replaced by FA, and nano‐TiO2 was added by 0.4%, 0.8%, 1.2%, 1.6%, and 2% of the FA weight. To investigate the effect of the ball mill period on the UHPC properties, periods of 10, 20, 30, and 40 min were applied to a binder of 20% FA and with 6% nano‐TiO2. In addition, a 30‐min ball mill period on a binder of 20% FA and 0.4%, 0.8%, 1.2%, 1.6%, and 2% nano‐TiO2 was also investigated. Tests of compressive strength after 1, 7, 28, and 91 days of curing in tap water, splitting tensile strength, flexural strength, and modulus of elasticity were performed after 28 days of curing in tap water. Tests of chloride permeability, sorptivity coefficient, water permeability, and microstructure were also performed after 28 days of curing in tap water. The results showed that the addition of higher percentages of nano‐TiO2 led to a decrease in workability. The addition of nano‐TiO2 improved the mechanical properties. The highest compressive strength of 208.9 MPa was achieved for the mixture of 20% FA with 1.2% nano‐TiO2 at the age of 28 days. The 30‐min period of application of the ball mill achieved the best performance compared with the other periods. The results of using a ball‐mill to re‐mix nano‐TiO2 between 1.2% and 2% by weight with FA showed impressive comparative results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of modified nano‐titanium and fly ash on ultra‐high‐performance concrete properties

Ghanim

Amin

Zeyad

et al. 2023

Structural Concrete

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“…Ultra‐high performance concrete (UHPC) is a remarkable material composed of cement, fine‐grained sand, silica fume, superplasticizer, steel fiber, and water. It stands apart from normal concrete (NC) due to its dense and homogeneous nature, achieved through a low water–cement ratio, a significant cement content, and various chemical admixtures 1 . The outstanding properties of UHPC, such as high compressive strength, excellent ductility, and long‐term stability, offer promising possibilities in the realm of building and infrastructure development.…”

Section: Introductionmentioning

confidence: 99%

Study on flexural and shear performance of ultra‐high performance concrete prefabricated pi‐beams

Sun,

Luo,

Xiao

et al. 2023

Structural Concrete

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Ultra‐high performance concrete (UHPC) prefabricated beams are competitive in accelerated bridge construction. However, their broader application has been hindered by limited large‐scale tests and inaccurate design methods. To fill this gap, the authors conducted an experimental investigation on the shear and flexural performance of UHPC pi‐beams using two full‐scale specimens. One specimen was a precast UHPC beam, while the other was a composite beam with a normal concrete slab on the UHPC beam. The primary focus was on crack propagation, ultimate capacities, and failure modes. To complement the experimental findings, the extended finite element method (XFEM) was developed as a numerical approach. Nevertheless, relying solely on XFEM to understand real structural behavior is prone to misinterpretations. Moreover, the shear and flexural capacities were evaluated using existing codes and compared with the experimental results. The comparisons revealed that the predictions of shear capacities were at least 15% lower than the experimental values, whereas the flexural capacities showed acceptable agreement. To address this, the authors introduced the limit equilibrium method, leading to a more accurate prediction of shear capacity for UHPC beams with a deviation of <2%.

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“…Nanomaterials refer to particles with a particle size in the range of 1 to 100 nm, which are characterized by small size and large specific surface area [11,12]. Nanomaterials can not only fill the gap between cement particles [13], but also improve the structure of the aggregate contact area, and promote the pozzolanic reaction of cement [14], thereby improving the mechanical properties and durability of concrete [15].…”

Section: Introduction *mentioning

confidence: 99%

Effects of Nanomaterials Reinforced Aggregate on Mechanical Properties and Microstructure of Recycled Brick Aggregate Concrete

Wang¹,

WANG²,

CUI³

et al. 2023

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In this paper, the effects of nano-SiO2 and nano-Al2O3 on the brick aggregate properties, compressive strength of brick aggregate concrete at different ages, and microstructure of brick aggregate concrete are investigated. The results show that the water absorption of recycled brick aggregate decreases with the increase of nanomaterials solution concentrations, and the crush index of recycled brick aggregate decreases. Nano-SiO2 and nano-Al2O3 improve the compressive strength of recycled brick aggregate concrete at different ages, and the effect of nanomaterials on the early strength of concrete are more obvious. With the increase of nano-solution concentration, the compressive strength of nano-SiO2 reinforced brick aggregate concrete increases first and then decreases, while that of nano-Al2O3 reinforced brick aggregate concrete increases. The internal structure of nanomaterials reinforced brick aggregate is denser, micro cracks and pores are filled with hydration products, and the interfacial transition zone is more compact.

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Application of nanomaterials in ultra-high performance concrete: A review

Cited by 78 publications

References 97 publications

Effect of modified nano‐titanium and fly ash on ultra‐high‐performance concrete properties

Effect of modified nano‐titanium and fly ash on ultra‐high‐performance concrete properties

Study on flexural and shear performance of ultra‐high performance concrete prefabricated pi‐beams

Effects of Nanomaterials Reinforced Aggregate on Mechanical Properties and Microstructure of Recycled Brick Aggregate Concrete

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