Effects of ring-type and straight steel fibres on the compressive performance of rubber-recycled aggregate concrete

He, Shaohua; Li, Lijuan; Xiong, Zhe; Zhang, Hongqing; Zheng, Jinhu; Su, Yue; Huang, Jian; Liu, Feng

doi:10.1016/j.jobe.2023.107148

Cited by 3 publications

(6 citation statements)

References 40 publications

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“…A total of 17 groups of mix proportions and their compressive strength were designed for this study, as presented in Table 2 (more relative parameters of mechanical properties can be found in our previous research [31]). Three specimens were created for each group, resulting in a total of 51 pull-out specimens.…”

Section: Proportionsmentioning

confidence: 99%

Section: Proportionsmentioning

confidence: 99%

“…Five different ratios were set: 0%, 25%, 50%, 75%, and 100%. Based on our pre-experiment and taking into account the environmental advantages of utilizing waste rubber [31], we incorporated RPs by substituting a portion of the fine aggregate with an equal volume, while the incorporation ratio was consistently set at 20%. Additionally, the water-cement ratio was fixed at 0.38 (as the aggregate was dried after drying, the moisture content of the aggregate was not taken into consideration).…”

Section: Proportionsmentioning

confidence: 99%

“…Choi et al [30] demonstrated that the flexural toughness of ring-type steel fibre reinforced concrete (RSFRC) was significantly improved compared to traditional SSFRC, thus confirming the potential of RSFs in enhancing concrete performance. He et al [31] found that incorporating an appropriate proportion of SSFs mixed with RSFs can greatly enhance the compressive performance of RRAC. This finding suggests that the combination of SSFs and RSFs could be a reliable approach to promoting RRAC.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on the Effects of Straight and Ring-Type Steel Fibres on the Bond Behaviour of Steel Bars in Rubber-Recycled Aggregate Concrete

Ma,

Li,

Zheng

et al. 2024

Buildings

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The application range of rubber-recycled aggregate concrete (RRAC), a new type of green building material, is currently limited due to performance defects, including low hardness, high water absorption, and poor adhesion. To expand its application in reinforced concrete structures, it is crucial to enhance the bonding performance between RRAC and steel bars. In this study, the effects of adding straight steel fibres (SSFs) and ring-type steel fibres (RSFs) to RRAC were investigated, in order to enhance the bonding performance. To investigate the impact of steel fibres (SFs) on the bonding properties of RRAC and steel bars, a total of 51 specimens were subjected to pull-out tests to systematically examine the impact of SSF and RSF dosages on the bonding performance. The results demonstrated that incorporating the optimal amount of SSFs and RSFs can significantly improve the bond strength and bond stiffness. Moreover, the combined use of SSFs and RSFs yielded even better enhancement effects. The RRAC exhibited remarkable performance, when the total content of SFs was 1.2% and the proportion of RSFs 75%. In this case, the bond strength and bond stiffness were enhanced by 3.7% and 53.88%, respectively. Finally, a bond–slip constitutive model for RRAC and steel bar was established. The combined use of SSFs and RSFs minimizes the limitations of poor mechanical properties in traditional RRAC and holds significant value for the widespread adoption and application of RRAC.

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Section: Proportionsmentioning

confidence: 99%

Section: Proportionsmentioning

confidence: 99%

Section: Proportionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Study on the Effects of Straight and Ring-Type Steel Fibres on the Bond Behaviour of Steel Bars in Rubber-Recycled Aggregate Concrete

Ma,

Li,

Zheng

et al. 2024

Buildings

Self Cite

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“…One promising solution is the incorporation of waste tire rubber in the manufacturing of mortar and concrete, providing an environmentally friendly and sustainable approach to waste disposal [9,10]. In recent years, numerous researchers have explored the potential of utilizing waste tire rubber as a partial replacement for natural fine aggregate in mortar [11,12]. They have discovered that waste tire rubber can be processed into rubber powder (RP) through mechanical grinding, which can then be used in the preparation of rubberized cement-based materials.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Thermal Insulation Rubberized Mortar Modified by Fly Ash and Glass Fiber

Pan,

Liu,

et al. 2024

Buildings

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The utilization of waste rubber as a viable option for manufacturing building materials holds great significance for the sustainable development of the construction industry. This study explores the addition of two additives, fly ash (FA) and glass fiber (GF), to rubberized mortar in order to improve its performance. The impact of different waste rubber powder (RP) replacement rates and modified additive dosages on the performance of rubberized mortar, including fluidity, mechanical properties, drying shrinkage, impact resistance, and thermal insulation properties, was investigated. Furthermore, the analytic hierarchy process (AHP) was adopted to study the priorities of the rubberized mortar modified by FA and GF. The results indicate that the addition of RP leads to a decrease in mortar fluidity, mechanical properties, and drying shrinkage. However, it can enhance its impact resistance and thermal insulation properties. The additives, FA and GF, have a significant influence on the properties of rubberized mortar. By means of AHP method analysis, this study concludes that the optimal comprehensive properties of FA- and GF-modified rubberized mortar can be achieved by replacing 10% of sand with RP and using 10% FA and 0.4% GF. This study presents a configuration method for modified thermal insulation rubberized mortar, and it may lead to FA and GF being considered potential candidates for developing environmentally friendly building materials.

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Testing and Analysis of Ultra-High Toughness Cementitious Composite-Confined Recycled Aggregate Concrete under Axial Compression Loading

He,

Peng,

Jia

et al. 2023

Materials

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In order to analyze the axial compressive properties of ultra-high-toughness cementitious composite (UHTCC)-confined recycled aggregate concrete (RAC), a batch of UHTCC-confined RAC components was designed and manufactured according to the requirements of GB/T50081-2002 specifications. After analyzing the surface failure phenomenon, load-displacement curves, scanning electron microscope (SEM), and parameter analysis of the specimen, the result shows that UHTCC-confined RAC is an effective confinement method, which can effectively improve the mechanical properties and control the degree of surface failure of RAC structures. Compared with the unconfined specimen, the maximum peak load of the UHTCC confinement layer with a thickness of 10 mm and 20 mm increased by 44.61% and 79.27%, respectively, meeting the requirements of engineering practice. Different fiber mixing amounts have different effects on improving the mechanical performance of RAC structural. The specific rule was steel fiber (SF) > polyvinyl alcohol fiber (PVAF) > polyvinyl alcohol fiber (PEF) > no fiber mixture, and the SF improves the axial compression properties of UHTCC most significantly. When there are strict requirements for improving the mechanical properties of the structure, SF should be added to UHTCC. On the contrary, PVAF should be added to UHTCC.

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Effects of ring-type and straight steel fibres on the compressive performance of rubber-recycled aggregate concrete

Cited by 3 publications

References 40 publications

Experimental Study on the Effects of Straight and Ring-Type Steel Fibres on the Bond Behaviour of Steel Bars in Rubber-Recycled Aggregate Concrete

Experimental Study on the Effects of Straight and Ring-Type Steel Fibres on the Bond Behaviour of Steel Bars in Rubber-Recycled Aggregate Concrete

Performance Evaluation of Thermal Insulation Rubberized Mortar Modified by Fly Ash and Glass Fiber

Testing and Analysis of Ultra-High Toughness Cementitious Composite-Confined Recycled Aggregate Concrete under Axial Compression Loading

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