Dynamic mechanical properties of carbon fiber reinforced geopolymer concrete at different ages

Wang, Zhihang; Bai, Erlei; Ren, Biao; Huang, He; Ren, Weibo

doi:10.1016/j.ceramint.2022.09.056

Cited by 26 publications

(8 citation statements)

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“…Four sets of experimental data (called examples 1 to 4) from literature [28,29,36,37] are used to validate the new model, and the results are compared with the existing logarithmic model and cubic polynomial model fitting results to illustrate the advantages of the proposed model.…”

Section: Model Verification and Comparison By The Test Data Compiled ...mentioning

confidence: 99%

“…In example 4 (the literature [37]), the 150 mm × 150 mm × 150 mm high-strength concrete cube test blocks were designed and fabricated according to the C80 strength grade, and the compressive strengths of days 0.5, 1, 3, 7, 14, 28, and 90 are examined respectively, as shown in Figure 5 (represented by the symbol "o"). The fitting curves obtained by the three models are also shown in Figure 5.…”

Section: Indexmentioning

confidence: 99%

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Mathematical Model for Early-Aged UHPFRC Compressive Strength Changes

et al. 2023

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Compressive strength is the most important mechanical index of ultra-high performance fiber-reinforced concrete (UHPFRC). The rule of changes in compressive strength in early-aged UHPFRC is of great significance to guide concrete curing, formwork removal, and prestress stretching. Therefore, it is very necessary to study an accurate mathematical model to describe the change in compressive strength of UHPFRC at an early age. For this purpose, a new mathematical model of compressive strength age is proposed in this work for predicting the long-term strength of UHPFRC according to a few test data from early-aged UHPFRC. This new model can overcome the shortcomings of the existing models, such as the exponential model, logarithmic model, and polynomial model. The proposed model is first demonstrated by using four groups of compressive strength test data compiled from previous research studies. Subsequently, an experiment of early-aged UHPFRC compressive strength was carried out to further verify the proposed mathematical model. The mixed proportion used in the UHPFRC compressive strength test was 10.87:0.82:1 (powder:steel fiber:water), and the design strength grade was 120 MPa. Based on the UHPFRC experimental data, it was shown that the average fitting error and standard deviation of the new model were about 10%~20% of that of the logarithmic model and the polynomial model. The proposed model can precisely predict the compressive strength of UHPFRC, with a determination coefficient (R2) of 0.9974. The research results show that the average fitting error and standard deviation of this new model were significantly reduced when compared to the existing models, and the predicted compressive strength by the new model on the 60th day is the closest to the actual design strength grade of concrete. The greatest advantage of the proposed method lies in its simple formula, fast implementation, and no need for complex mathematical operations. It has been shown that the proposed model is superior to the existing models due to its higher fitting accuracy and prediction accuracy, and it can be better used to predict the later strength of UHPFRC by using only a few compressive strength test data taken at the early age stage.

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Section: Model Verification and Comparison By The Test Data Compiled ...mentioning

confidence: 99%

Section: Indexmentioning

confidence: 99%

Mathematical Model for Early-Aged UHPFRC Compressive Strength Changes

et al. 2023

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“…The company combined microbial fermentation technology with separation membrane chemical purification technology to convert crop residues and other inedible plant resources into sugars and, for the first time, discovered that certain microorganisms can produce adipic acid intermediates from these sugars. Toray used genetic engineering technology to increase the production efficiency of these microorganisms and realized a more than 1000‐fold increase in the yield of the adipic acid intermediates synthesized by these microorganisms since their initial discovery 104 …”

Section: Tire Cordsmentioning

confidence: 99%

“…Toray used genetic engineering technology to increase the production efficiency of these microorganisms and realized a more than 1000fold increase in the yield of the adipic acid intermediates synthesized by these microorganisms since their initial discovery. 104 Bio-based PA56 is synthesized by the polymerization of pentanediamine and adipic acid, which can both be prepared using renewable resources (Figure 11A-C). Researchers have found that semi-bio-based PA56 based on bio-based pentanediamine and petroleum-based adipic acid has thermal, mechanical, and processing properties comparable to those of petroleum-based PA66.…”

Section: Bio-based Polyamide Fibermentioning

confidence: 99%

Research progress on sustainability of key tire materials

Deng,

Chen,

Duan

et al. 2023

SusMat

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In recent years, countries worldwide have engaged actively in the research and development of green and sustainable materials in the face of the increasing depletion of petroleum resources, the need to reduce material waste, and the environmental pollution caused by the various types of waste. In the tire industry, the key materials for the various components of tires are mostly dependent on petroleum resources. Development of green tires and green processing technologies using sustainable materials is an important development direction for the future of the tire industry, and many tire‐manufacturing companies have proposed their visions for the development of eco‐friendly tires. Rubber, cord fabric, and additives are the main materials used in tire manufacturing. This article summarizes the research status of the green materials that can meet the requirements of environmental friendliness and sustainability, replace traditional materials, and reduce petroleum resource consumption in existing tire production. These materials mainly include natural rubber or bio‐based synthetic rubber, green renewable cord fabrics, and green processing additives. The prospects for the application of these new green materials in tire manufacturing are also discussed.

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“…Ordinary Portland cement serves as the main raw material for the preparation of concrete; however, a large number of greenhouse gases and harmful emissions are generated in the entire production process of cement generates [ 1 ], including carbon dioxide and sulfur dioxide [ 2 ]. It is reported that the production of one ton of cement will release one ton of carbon dioxide, and the carbon dioxide released by the production of cement accounts for about 5–7% of the total global carbon dioxide emissions [ 3 , 4 , 5 , 6 ]. Additionally, cement manufacturing requires continuous electrical energy, and its energy consumption is second only to steel and aluminum [ 7 ], which exerts enormous pressure on energy consumption [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Fiber on the Mechanical Properties of Geopolymer Concrete: A Review

et al. 2023

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Geopolymer is widely used as a supplement to cementitious composites because of its advantages of low carbon and environmental protection, and geopolymer concrete is also broadly used in practical engineering. In recent years, geopolymer concrete has attracted increasing interest owing to its superior mechanical properties, and a series of research results have been obtained. In this paper, from the preparation of geopolymer concrete, based on the characteristics that geopolymer concrete is brittle and easy to crack, the types and basic properties of fibers to enhance the toughness of concrete are analyzed, the advantages and disadvantages of different fibers used as a material to enhance the toughness of concrete are summarized, and we review the effects of type, shape, volume rate, aspect ratio, and hybrid fiber combinations on the static mechanical properties. The results indicate that fibers have significant potential to enhance the compressive strength, splitting tensile strength, flexural strength, and fracture toughness of geopolymer concrete, and the optimal fiber volume rate seems to be related to the fiber type. Whereas the effect of aspect ratio and hybrid fiber combinations on the properties of geopolymer concrete seems to be obvious. This paper reviews the influence of fiber on the basic mechanical properties of geopolymer concrete, which provides a solid foundation to promote the further development and application of the research on the toughness of fiber-reinforced geopolymer concrete and provides recommendations for future research.

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Dynamic mechanical properties of carbon fiber reinforced geopolymer concrete at different ages

Cited by 26 publications

References 50 publications

Mathematical Model for Early-Aged UHPFRC Compressive Strength Changes

Mathematical Model for Early-Aged UHPFRC Compressive Strength Changes

Research progress on sustainability of key tire materials

The Influence of Fiber on the Mechanical Properties of Geopolymer Concrete: A Review

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