Research on flexural performance of composited RC beams with different forms of TRC permanent formwork

Yin, Shiping; Cong, Xi; Wang, Changyu; Wang, Congcong

doi:10.1016/j.istruc.2020.12.034

Cited by 20 publications

(5 citation statements)

References 19 publications

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“…As discussed earlier, vertical layering will only be discussed for the gradation along the width, which comprises a U-shaped external layer of higher grade and an internal core of lower grade. The study by Yin et al [8] highlighted the superior bonding of U-shaped type permanent formwork over plate-type formwork, which exhibited bonding issues. Unlike horizontal layering, vertical layering through the U-shaped layer covers the sideboard of the beam, which provides additional resistance to the ingress of contaminants and also offers the contribution to the compressive force of resistance, as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…In horizontal layering, the thickness of the layer surrounding reinforcements is adjusted concerning the level of reinforcement. Previous experimental studies showed durability and mechanical behavior issues with FGC beams with interface positions at and below reinforcements [8]. Thus, the thickness of the surrounding layer is adopted as the one for which the interface lies above reinforcements.…”

Section: Design Calculation and Processmentioning

confidence: 99%

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Functionally Graded Concrete: Structural Design and Effect on Sustainability Parameters

Kondraivendhan,

Rathi

2023

KEM

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Researchers have become interested in functionally graded concrete (FGC) in recent years due to its potential to enhance the desired performance. Functional gradation can be carried out in a continuous or stepped/layered manner. Most studies have been conducted on two layered FGC beams by substituting the richer mixes in either tension or compression zone. Previous studies have incorporated and presented the structural design approach of such two-layered beams. Moreover, the layer in the compression zone was assumed to bear entire compressive stresses. Previous studies exhibited savings in cement by up to 37% using a layer of the concrete class defined by exposure conditions around reinforcement and the concrete of minimal structural class. However, using structural concrete of minimal class in the remaining segments may result in a higher reinforcement requirement, reducing the benefits of savings in embodied CO2 offered by reduced cement consumption. This paper examines how designing the beam as a Functionally Graded Reinforced Concrete (FGRC) beam following Indian Standard 456:2016 affects the cost and embodied CO2 based on cement and steel consumption through the durability approach of design, wherein the substitution of the layer is considered in the tension zone. The study revealed that a 10% and 16% reduction in cost and embodied CO2 could be accomplished.

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Section: Methodsmentioning

confidence: 99%

Section: Design Calculation and Processmentioning

confidence: 99%

Functionally Graded Concrete: Structural Design and Effect on Sustainability Parameters

Kondraivendhan,

Rathi

2023

KEM

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“…Potential applications of TRC include facing and sandwich panels; thin-walled lightweight elements; lightweight constructions and complex civil engineering structures; repair of existing buildings and constructions; fire resistance; and high temperature performance materials [5,[20][21][22]. However, at variance to textile/organic resin-based composites, no prepreg with mineral matrix exists.…”

Section: Introductionmentioning

confidence: 99%

Alkali-Activated Copper Slag with Carbon Reinforcement: Effects of Metakaolinite, OPC and Surfactants

Lemougna,

Hernandez,

Dilissen

et al. 2024

Applied Sciences

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Copper slag is an industrial residue with a large unutilized fraction. This study presents the development of alkali-activated composites from a copper slag named Koranel®. The effects of metakaolinite, ordinary Portland cement (OPC) and surfactants were investigated. The reactivity of Koranel with potassium silicate solutions with molar ratio R = SiO2/K2O varying from 1 to 2.75, with 0.25 intervals, was investigated using isothermal calorimetry. The reactivity was relatively low at 20 °C; the reaction started after a few hours with a low silica modulus, to several weeks with the highest silica modulus. The substitution of Koranel by OPC (5 wt.%) or by metakaolinite (10–20 wt.%), both led to higher reaction heat and rate; meanwhile, the addition of 2 wt.% polyethylene glycol/2-methyl 2,4 pentanediol delayed the reaction time in the system containing metakaolinite. Raising the curing temperature from 20 °C to 80 °C shortened the setting time of the low reactive systems, from several days to almost instantaneous, opening perspectives for their application in the production of prepreg composite materials. The use of carbon fabric as reinforcement in the alkali-activated matrix led to composite materials with flexural strength reaching 88 MPa and elastic modulus of about 19 GPa—interesting for engineering applications such as high-strength lightweight panels.

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“…These mainly focus on exploring the effect of permanent formwork made of different matrix materials on composite members. For example, the use of engineered cementitious composite (ECC) [14,15], ultra-high-toughness cementitious composites (UHTCC) [16], reinforced ultra-high-toughness cementitious composites (RUHTCC) [17], ultra-high-performance concrete (UHPC) [9], textile-reinforced concrete (TRC) [18][19][20], and other materials are all able to improve the load carrying capacity and deformation capacity of composite members to different degrees. In addition, the shape of the formwork also affects the composite members.…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanical Properties of MiC Formworks with Different Material Components

Wang,

Yang,

Chen

2023

Buildings

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Modular integrated construction (MiC) is a new type of assembled building structure system that consists of prefabricated concrete modules connected using post-cast concrete. To reduce material consumption and realize casting without supporting molds, thin and lightweight concrete formworks (MiC formworks) with a thickness of 30 mm are installed as part of the shear wall. Due to the thinness, concrete pouring tends to cause MiC formwork cracking, mold rising, and other problems. Its stress performance and damage mechanism are not clear. For this reason, three groups of MiC formworks with different material composition types are designed. The static load test is carried out in a graded partition loading mode, and parametric analysis is combined with numerical simulation to systematically study the influence of different material components on the mechanical properties of MiC formworks. The results show that the front cracks of the MiC formworks are mainly distributed under the truss tendons, and the back cracks are mainly distributed in the span position of the adjacent truss tendons. These cracks both occur along the span direction of the MiC formworks. Increasing the concrete strength has a significant effect on improving the load-bearing capacity of MiC formworks, while incorporating steel fibers can significantly improve its deformation and crack resistance. Parametric analysis showed that the steel fiber admixture exhibited limited improvements in the cracking resistance of the panels as the concrete matrix grade increased. The research results provide a practical basis for optimizing the production process of MiC formworks.

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Research on flexural performance of composited RC beams with different forms of TRC permanent formwork

Cited by 20 publications

References 19 publications

Functionally Graded Concrete: Structural Design and Effect on Sustainability Parameters

Functionally Graded Concrete: Structural Design and Effect on Sustainability Parameters

Alkali-Activated Copper Slag with Carbon Reinforcement: Effects of Metakaolinite, OPC and Surfactants

Study on the Mechanical Properties of MiC Formworks with Different Material Components

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