Multi-Functional High-Performance Cement Based Composite

Bažantová, Zdeňka; Kolář, Karel; Konvalinka, Petr; Litoš, Jiří

doi:10.4028/www.scientific.net/kem.677.53

Cited by 16 publications

(9 citation statements)

References 13 publications

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“…The cementitious matrix used in the framework of this study is consisting of fine-grained aggregate with fraction up to 1 mm, cement, silica fume, glass powder, water, and high-range water-reducers, fully described in [15]- [17] ( Table 2). The components were mixed in a 750 kg mixer and transported into the lab in 12 kg bags as a dry prefabricated mixture.…”

Section: Production Of Samplesmentioning

confidence: 99%

Directed Orientation of Steel Fibres in Ultra-High-Performance Cementitious Composite Using the Magnetic Field

Lovichová

Takáčová

Künzel

et al. 2020

WIT Transactions on the Built Environment

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Ultra-high-performance fibre-reinforced cementitious composites are one of the key industries in the field of concrete technology. Thanks to their exceptional mechanical properties and significantly improved ductility, they are widely used for various special applications such as defensive and protective structures. In composite materials, it is desirable to place the reinforcement where it is needed and in the direction it is needed. In fibre-reinforced cementitious composites, this orientation is possible through a magnetic field. In the framework of this study, a prototype device for controlled fibre orientation in a cementitious composite was developed. Mixtures of both cementitious composite and ultrasound gel having similar rheological properties to the cementitious matrix were tested. It has been observed that is possible to control the orientation of the steel fibres and direct the fibres in the desired direction by employing an electromagnetic field.

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Section: Production Of Samplesmentioning

confidence: 99%

Directed Orientation of Steel Fibres in Ultra-High-Performance Cementitious Composite Using the Magnetic Field

Lovichová

Takáčová

Künzel

et al. 2020

WIT Transactions on the Built Environment

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“…Table 1 shows the basic components and their relative weight dosages. This type of concrete was used in many previous studies and is described in detail elsewhere [21,22] along with its patent [23].…”

Section: Ultra-high-performance Fibre-reinforced Cementitious Compositementioning

confidence: 99%

Experimental Investigation of Thin-Walled UHPFRCC Modular Barrier for Blast and Ballistic Protection

et al. 2020

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The static response of ballistic panels and also its resistance to blast and ballistic impact is investigated in the framework of this study. By connecting individual ballistic panels together, the protective barrier can be constructed. The protective barrier can be featured as a system with high mobility and versatility that is achieved by linking basic interlocking plate elements together. The resulting protective barrier can be shaped according to many possible scenarios in a wall with various possible opening angles and a small post with the tetragonal base or a larger post with the hexagonal ground plan. The material solution of the protective barrier benefits from the application of ultra-high-performance fibre-reinforced cement-based composites (UHPFRCC), which meets the requirements for enhanced resistance against extreme loads such as blast or impact. Besides, by using UHPFRCC, thin and slender design can be adopted, which is advantageous in many ways. Slender design results in a lower weight, allowing for easy manipulation and replacement. To verify the behavior of the panels, the proposed barrier was subjected to various loadings at different strain rates. The experimental campaign demonstrated that the protective barrier has a reasonable load-bearing capacity and also sufficient resistance against projectile impact and blast effects.

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“…Multi-functional dry prefabricated cementitious composite material used in this study was developed and created by Experimental center of the Czech Technical University in Prague and tested during previous laboratory experiments using standard procedures [6][7][8].…”

Section: Multi-functional Ultra-high-performance Cement Based Compositementioning

confidence: 99%

Modelling and Manufacturing of Complex Architectural Elements of Concrete Using Industrial Robots in Formwork Fabrication

Usmanov

Fakhri

Jogl

et al. 2020

SSP

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The article is aimed at the description of design, 3D modelling and simulation of technology for processing and fabrication of the formwork for complex concrete structures. The process of fabrication of complex-shaped elements from the special composite concrete mixture with application of several sophisticated software, technologies and industrial robot KUKA Agilus is also described in this work. The RHWC (Robotic Hot Wire Cutter) technology fully matches the prior aspects of the Industry 4.0 concept. The study consists of four parts. The first part simplified describes the mathematical apparatus of parametric modelling for complex concrete surfaces in Rhino 6.0 software. During the research two figures was precisely designed and modelled. The second part is aimed at the description of contemporary architectural trends in complex concrete structures manufacturing, modelling and analysis of ability to implement the complex-shaped surfaces with the RHWC technology. The third part describes the materials for technology. Expanded Polystyrene foam was chosen as the optimal material for the fabrication of formwork for complex-shaped concrete structures for its cost, weight and processability, as well as the special composite cement mixture which fully met all the requirements for its fluidity and smoothness. The fourth part is demonstration of the whole fabrication process, formwork treatment and concrete pour. This work also contains all necessary aspects for meeting the quality requirements on architectural concrete.

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Multi-Functional High-Performance Cement Based Composite

Cited by 16 publications

References 13 publications

Directed Orientation of Steel Fibres in Ultra-High-Performance Cementitious Composite Using the Magnetic Field

Directed Orientation of Steel Fibres in Ultra-High-Performance Cementitious Composite Using the Magnetic Field

Experimental Investigation of Thin-Walled UHPFRCC Modular Barrier for Blast and Ballistic Protection

Modelling and Manufacturing of Complex Architectural Elements of Concrete Using Industrial Robots in Formwork Fabrication

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