Hybrid precast tunnel segments in fiber reinforced concrete with glass fiber reinforced bars

Meda, Alberto; Rinaldi, Zila; Spagnuolo, Simone; Rivaz, Benoit De; Giamundo, N

doi:10.1016/j.tust.2019.01.016

Cited by 54 publications

(18 citation statements)

References 28 publications

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“…Numerous studies [34][35][36][37][38][39][40][41] attempt to find ways of using materials for the production of ceramics, binders, mortar, concrete, insulation materials, for the production of glass fibers, foamed glass, mats, insulation plates, laminates and bituminous materials. Tests [10,40,42] were carried out to determine possibilities of applying cullet among others as replacement for natural aggregate to concrete, substitute of natural soils, or construction of roads and subgrades.…”

Section: Introductionmentioning

confidence: 99%

Effect of High Temperatures on the Impact Strength of Concrete Based on Recycled Aggregate Made of Heat-Resistant Cullet

2020

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The article presents results obtained during testing of concrete based on CEM I 42.5R Portland cement, fine and coarse aggregate, glass, volatile ash, and superplastifier. The concrete mixture was modified using filler consisting of bromosilicate heat resistant cullet. Recycled aggregate was added to the batch. Samples for the need of testing were produced as (100 × 100 × 100) mm cubes. Before commencing proper tests, samples have been heated within the temperature range of 20–800 °C. Tests carried out during the proper testing procedure included tests of compressive strength, elevated temperature, impact strength, as well as macroscopic tests of the contact area. The obtained test results have provided proof of there being a possibility of producing special concrete, modified by products obtained from heat resistant cullet. This type of is generally characterized by satisfactory performance parameters. The average compressive strength for concrete modified by a 10% of heat resistant cullet was determined as 43.6 MPa and 48.3 MPa respectively after 28 and 180 days of curing.

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Section: Introductionmentioning

confidence: 99%

Effect of High Temperatures on the Impact Strength of Concrete Based on Recycled Aggregate Made of Heat-Resistant Cullet

2020

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“…Numerous studies [6][7][8][9][10][11][12][13][14][15][16][17][18] have proven the suitability of using recycled materials in the production process of ceramics, binders, mortar, concrete, plaster, bituminous materials, etc. In the testing, use is being made of various types of cullet, including car glazing [19], soda-lime glass from containers [20][21][22], glass from technological lines of the pharmaceutical industry [23][24][25], cathode ray tubes for TV sets and computer screens [26,27], float glass from window glazing [28], glass from fluorescent lamps [29], glass from heat resistant dishes [30][31][32] and mirrors, safety glass, crystal glass, and colourless, green, and brown packaging glass [33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Glass Cullet as Additive to New Sustainable Composites Based on Alumina Binder

et al. 2021

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The article investigated the possibility of reusing heat resistant glass cullet to improve the mechanical properties of high-temperature composites. This is an excellent recycled aggregate that may be used as a substitute for alumina cement, and for fine natural aggregate in the production of concrete based on hydraulic binder. The experimental programme comprised of strength testing conducted on 40 × 40 × 160 mm cuboidal samples. The model mixture was modified by filler that comprised glass recyclate, amounting to 5%, 10%, and 15% of the mass of gravel and cement. Given the degree of glass grounding, use was made of two fractions, 0/4 and 0/0.125 mm. Six modified mixtures were produced. Tests were then carried out on their selected physical and mechanical properties as well as the impact of temperature, topography, and chemical composition exerted on the composite. Next, the progress and development of compressive strength and flexural strength after 14 and 28 days of curing were studied. Results showed that concrete with a 5% content of glass dust had a maximum compressive strength at the level of 85.1 MPa. Results also showed that concrete (Zk.I.5) heated at a temperature of 500 °C had a 46% higher compressive strength when compared to basic concrete (Z.I.0). The results show that it is possible to use the described components to obtain a composite that meets requirements imposed on structural materials used in construction engineering.

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“…In tunnelling works, steel fibres distributed throughout the lining strengthens the corner for the segmental lining in the TBM (tunnel boring machine) tunnel, resulting in enhanced durability [31,32]. Therefore, SFRC could replace the steel bars utilised in the traditional RC solution because the use of SFRC can lead to substantially increased productivity, while also reducing the construction cost and time [33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Design Study of Steel Fibre Reinforced Concrete Shaft Lining for Swelling Ground in Toronto, Canada

Kim

Lee

2021

Applied Sciences

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Reinforced concrete (RC) is a widely used construction material around the world. RC has many advantages in terms of structural stability. However, the reinforcement of RC requires extensive labour costs. Steel fibre reinforced concrete (SFRC) has been widely studied to replace steel bars in concrete structures over the decades. However, most underground structures, such as tunnel lining, are usually designed using conventional RC for long-term stability due to unexpected geotechnical characteristics, such as directional and depth-dependent varied lateral pressure, earthquakes, groundwater, and time-dependent swelling behaviour. In this paper, an alternative design of shaft structure using SFRC, based on the original RC designed data in the Toronto region, was studied to evaluate the feasibility of SFRC replacing conventional RC. A key geological feature of the site is that the bedrock is comprised of Georgian Bay shale, which exhibits long-term time-dependent deformation (TDD). The capacities of RC and SFRC for the shaft lining were calculated based on the Canadian concrete design codes CSA A23.3 and RILEM TC 162-TDF, to assess the benefit of adding steel fibre, and several analytical solutions were used to calculate the applied load on the lining. A specialised TDD constitutive model in Fast Lagrangian Analysis of Continua (FLAC) 2D was developed to estimate whether the optimum installation time of the shaft lining, based on the geological reports, is appropriate under swelling behaviour, and evaluate the resultant long-term stability. The calculated hoop thrust and bending moment for several loading cases were within the capacity of the SFRC shaft lining. The numerical analysis demonstrated that the proposed lining installation time could be reduced, despite consideration of the long-term TDD behaviour.

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Hybrid precast tunnel segments in fiber reinforced concrete with glass fiber reinforced bars

Cited by 54 publications

References 28 publications

Effect of High Temperatures on the Impact Strength of Concrete Based on Recycled Aggregate Made of Heat-Resistant Cullet

Effect of High Temperatures on the Impact Strength of Concrete Based on Recycled Aggregate Made of Heat-Resistant Cullet

Glass Cullet as Additive to New Sustainable Composites Based on Alumina Binder

Design Study of Steel Fibre Reinforced Concrete Shaft Lining for Swelling Ground in Toronto, Canada

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