Composite Behaviour of Textile Reinforced Reactive Powder Concrete Sandwich Façade Elements

Flansbjer, Mathias; Portal, Natalie Williams; Vennetti, Daniel; Mueller, Urs

doi:10.1186/s40069-018-0301-4

Cited by 28 publications

(22 citation statements)

References 8 publications

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“…The angles are determined as 0 • , 45 • , 90 • , and 135 • , the image grayscale is selected as 265, and the distance between the pixel pairs is 2 pixels. Therefore, when the construction factor is d = 2, g = 2 8 and θ selects 0 • , 45 • , 90 • and 135 • , and six characteristic parameters of the damaged area of the test piece are extracted. In order to satisfy the image rotation invariance, the average of the 4 angles is taken as the final value function parameter.…”

Section: Damage Parameter Acquisitionmentioning

confidence: 99%

“…Damage identification through various non-destructive testing techniques predict or diagnose the health of composite structures [1][2][3]. Reactive Powder Concrete (RPC), an emerging materials, are widely concerned in railway engineering, roads, buildings, airports and nuclear industrial facilities-ultra high strength, high toughness and high durability [4][5][6][7][8][9]. However, there are few researches on damage identification and detection of composite structures using RPC as raw materials.…”

Section: Introductionmentioning

confidence: 99%

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Damage Diagnosis of Reactive Powder Concrete under Fatigue Loading Using 3D Laser Scanning Technology

Wang

2019

Algorithms

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Damage mechanisms of Reactive Powder Concrete (RPC) under fatigue loading are investigated using the 3D laser scanning technology. An independently configured 3D laser scanning system is used to monitor the damaging procedure. Texture analysis technique is also applied to enhance the understanding of the damage mechanisms of RPC under fatigue loading. In order to obtain the characteristic parameters of point cloud data, a point clouds projection algorithm is proposed. Damage evolution is described by the change of point cloud data of the damage in the 2D plane and 3D space during fatigue loading. The Gray Level Co-occurrence Matrix (GLCM) method is used to extract the characteristic parameters to evaluate the statue of the structural. Angular Second Moment and Cluster Shadow of typical sensitive characteristic indexes is screened by using the Digital Feature Screening. The reliability of the damage index was verified by image texture analysis and data expansion. Indexes extracted in this paper can be used as a new structural health monitoring indicator to assess health condition.

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Section: Damage Parameter Acquisitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Damage Diagnosis of Reactive Powder Concrete under Fatigue Loading Using 3D Laser Scanning Technology

Wang

2019

Algorithms

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“…Golewski considers that using fly ashes cement binder causes a lot of benefits-both from the point of view of ecology and sustainable construction [3]. With the in-depth research of reactive powder concrete (RPC), the RPC has been well-developed and has been promoted in different applications, such as municipal works, roads and bridges [3][4][5][6][7][8][9][10][11][12][13][14][15][16]. However, limited research on adding reactive powder to self-compacting concrete has been done.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Ultrasonic Testing of Self-Compacting Concrete

Sun

Tian

et al. 2019

Energies

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Based on the urban shantytown renovation project in Hongguang Town, Helan County, Ningxia, in Northwest China, the influence of fly ash and silica fume admixture on the mechanical properties of Self-compacting Concrete (SCC) was tested and analyzed in this work. The experimental tests including compressive strength, splitting strength, triaxial strength and an ultrasonic nondestructive test. Furthermore, the Back Propagation (BP) neural network algorithms were established. The results show that there is an obvious difference between the development law of compressive strength of SCC and that of ordinary concrete. The splitting pressure ratio of SCC is 1/10 to 1/8, while that of ordinary concrete is 1/13 to 1/10. Moreover, the peak strain, peak stress and initial stiffness of SCC increase with the increase of the confining pressure when compressed from three directions. In addition, the ultrasonic amplitude of SCC can reflect the changing laws of its compressive strength. As a conclusion, the addition of fly ash and silica fume increases the splitting pressure ratio of SCC. More importantly, the compressive strength formula for SCC with silica fume and a low content of fly ash is proposed, and the model equation between the amplitude and compressive strength is given. This study provides a reference for the mixture ratio of fly ash and silica fume in the application of SCC.Compared with ordinary concrete, SCC has better properties in terms of realizing labor-saving concrete pouring to improve the quality and speed of construction, and in terms of upgrading the living environment of surrounding residents with reduced noises. Moreover, it also helps solve the steel tube vibration problem during construction [18][19][20]. Previous research [21][22][23][24][25] studied the effects of different amounts of steel fibers and polypropylene fibers on the mechanical properties of self-compacting reactive powder concrete. In particular, fewer examples of conventional triaxial testing on SCC mixed with fly ash and silica fume were reported. For instance, Farnam [26] studied the mechanical properties of 4 kinds of mortar-impregnated concrete specimens with varied steel fiber contents (0%, 2%, 5%, and 10%) under 4 sorts of confining pressures, and Giorgio proposed a micromorphic, non-linear 3D model [27]. In addition, the implementation of the national capacity-reduction policy and the clean utilization of coal make fly ash a prominent resource at present. Therefore, there is still large space for the research on SCC with fly ash and silica fume. Based on the urban shantytown renovation project in Hongguang Town, Ningxia, we used fly ash as an admixture for SCC in this work. There are many non-destructive methods used for analysing the concrete structure, such as the Digital Image Correlation (DIC) method [28] and the Ultrasound method. The amplitude was measured by ultrasonic wave, and the relationship between amplitude and compressive strength was established in this work. Furthermore, the relationship between the fly ash and ...

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“…However, Golewski [3] pointed out that from the perspective of economic and sustainable developments, the use of fly ash and silica fume as cementing materials instead of cement will bring many benefits. At present, reactive powder concrete has evolved into a comparatively mature phase and has become popular in various areas such as municipal works, buildings, roads and bridges [4][5][6][7][8][9][10]. Nonetheless, there is little research on self-compacting concrete (SCC) of double-doped silica fume-fly ash, and only Yang Zhiwei [11] and Bao Mingxuan [12] have done research on compressive strength, chloride ion penetration resistance and sulfate resistance of SCC of double-doped silica fume-fly ash.…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Properties of Self-Compacting Concrete and Its Filled in-Line Multi-Cavity Steel Tube Bundle Shear Wall

Sun

Zhang

et al. 2019

Energies

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In this paper, five groups of C40 fly ash and silica fume self-compacting concrete (SCC) mix proportion tests and in-line multi-cavity steel tube bundle self-compacting concrete shear wall axial compression performance tests and numerical simulation are completed and presented. The influence of fly ash and silica fume additions on SCC mechanical properties and the filled in-line multi-cavity steel tube bundle shear wall mechanical properties are analyzed and studied. With an increase in the fly ash content from 10% to 40%, the compressive strength of self-compacting concrete increases firstly and then decreases. When the fly ash content is 30% and the silica fume content is 4%, the compressive strength of the 28 d age self-compacting concrete is the highest and the compressive strength formula of the wrapped curing SCC is proposed. The failure of steel tube bundle is multi-wave buckling failure. As the SCC is most obviously affected by the collar at the corner point of the steel tube bundle, its compressive strength is 110 MPa, and is 96 MPa higher than the concrete at the middle point of the web. The deformation resistance of SCC is obviously enhanced by the confinement effect.

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Composite Behaviour of Textile Reinforced Reactive Powder Concrete Sandwich Façade Elements

Cited by 28 publications

References 8 publications

Damage Diagnosis of Reactive Powder Concrete under Fatigue Loading Using 3D Laser Scanning Technology

Damage Diagnosis of Reactive Powder Concrete under Fatigue Loading Using 3D Laser Scanning Technology

Mechanical and Ultrasonic Testing of Self-Compacting Concrete

Study on Mechanical Properties of Self-Compacting Concrete and Its Filled in-Line Multi-Cavity Steel Tube Bundle Shear Wall

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