Effect of silica fume and calcium carbonate whisker on interfacial behavior of near-surface-mounted FRP with magnesium phosphate cement

Zhang, Liwen; Geng, Tao; Liu, Zhouqiang; Zhang, Wenhua; Qing-hu, Shang

doi:10.1007/s43452-019-0004-x

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…All MPC specimens were casted depending on a basic mix proportion used in our previous studies [23][24][25], as shown in Table 2. Dead-burned MgO (1500 • C) from a factory in Zhengyang Casting Material Company (Xinmi, China) was used in this work, with a specific surface area of 227.5 m 2 /kg, a density of 2650 kg/m 3 , and a particle size of 45 µm.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…The flexural toughness of specimens was obtained through calculating the area enclosed by stage O-A-E in L-D curves, T 40 150 , as described in Figure 10b, according to ASTM C1609 [24], meaning the total flexural energy absorption (FE) of specimens in tests. Additionally, FE was divided into two parts for understanding the effects of CF on the energy absorption of specimens in different L-D stages.…”

Section: Flexural Toughnessmentioning

confidence: 99%

“…As shown in Figure 13b,c, FE increased by 178.8% and 433.3 N•mm when CF grew from 0% to 1% but increased by 6% and 80.5 N•mm when CF quantity rose from 3% to 4%, indicating a decline of CF's effect on improving MPC toughness as CF increases. The flexural toughness of specimens was obtained through calculating the area enclosed by stage O-A-E in L-D curves, T 40 150, as described in Figure 10b, according to ASTM C1609 [24], meaning the total flexural energy absorption (FE) of specimens in tests. Additionally, FE was divided into two parts for understanding the effects of CF on the energy absorption of specimens in different L-D stages.…”

Section: Flexural Toughnessmentioning

confidence: 99%

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Flexural Properties and Microstructure Mechanisms of Renewable Coir-Fiber-Reinforced Magnesium Phosphate Cement-Based Composite Considering Curing Ages

et al. 2020

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As a renewable natural plant fiber, Coir fiber (CF) can be used to as an alternative to improve poor toughness and crack resistance of magnesium phosphate cement (MPC), replacing such artificial fibers as steel fiber and glass fiber and thereby reducing huge energy consumptions and large costs in artificial fibers’ production and waste treatment. Aiming at examining the effects of CF volume concentrations on MPC flexural properties, this study employed a typical three-point bending test, including thirty cuboid specimens, to investigate the flexural strength, load-deflection behavior, and flexural toughness of MPC with different CF volume concentrations from 0% to 4% at the curing age of seven days and 28 days. Results demonstrated that CF presented similar effects on MPC’s properties at two curing ages. At both curing ages, as CF grew, flexural strength increased first and then decreased; specimen stiffness, i.e., MPC elastic modulus, displayed a decreasing trend; and flexural toughness was improved continuously. Additionally, modern microtesting techniques, such as, scanning electron microscopy (SEM) and energy dispersive X-ray detection (EDX), were adopted to analyze the microstructure and compositions of CF and specimens for explaining the properties microscopically.

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Section: Materials Propertiesmentioning

confidence: 99%

Section: Flexural Toughnessmentioning

confidence: 99%

Section: Flexural Toughnessmentioning

confidence: 99%

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Flexural Properties and Microstructure Mechanisms of Renewable Coir-Fiber-Reinforced Magnesium Phosphate Cement-Based Composite Considering Curing Ages

et al. 2020

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“…All specimens had a basic mix proportion employed in the authors’ previous studies [ 17 , 18 , 19 ], as shown in Table 1 . Dead-burned MgO (1500 °C), with a specific surface area of 227.5 m 2 /kg, a density of 2650 kg/m 3 , and a particle size of 45 μm, was produced by Zhengyang Casting Material Company (Xinmi, China), its chemical compositions listed in Table 2 .…”

Section: Experimental Programmentioning

confidence: 99%

Flexural Properties of Renewable Coir Fiber Reinforced Magnesium Phosphate Cement, Considering Fiber Length

Zhang

Jiang

et al. 2020

Materials

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Coir fiber (CF), a renewable natural plant fiber, is more competitive in improving poor toughness and crack resistance of magnesium phosphate cement (MPC) than artificial fibers, due to its slight energy consumptions and low costs in production and waste treatment. In this paper, a typical three-point bending test was carried out to study the effects of CF length on MPC flexural properties. A total of forty-two cuboid specimens were employed to investigate the flexural strength, load-deflection behavior, and flexural toughness of MPC, with CF lengths varying from 0 to 30 mm at the curing age of 7 days and 28 days. Results showed that, at both two curing ages, MPC flexural strength first increased with CF length increasing, and then deceased when CF length exceeded the threshold. However, with the increase of CF length, MPC flexural toughness increased continuously, while MPC elastic modulus displayed a decreasing trend. Additionally, Modern micro testing techniques, such as scanning electron microscope (SEM) and X-ray diffraction (XRD), were also used to study the microstructure and phase compositions of specimens for further explaining the themicroscopic mechanism.

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“…Their aims are to recover materials that might otherwise go unused, in addition to mitigating the above-mentioned environmental impacts and curtailing illegal dumping at landfill sites. 4,5 Those sustainable raw materials have included "green" binders, such as fly ash, 6 ground granulated blast furnace slag, 7 and silica fume, 8 in substitution of ordinary Portland cement, and alternative aggregates, such as electric arc furnace slag, 9 and rubber, 10 as well as recycled aggregate (RA) 11 in substitution of NA. The focus of this study is on the use of RA.…”

Section: Introductionmentioning

confidence: 99%

Scaled concrete beams containing maximum levels of coarse recycled aggregate: Structural verifications for precast‐concrete building applications

Fiol

Revilla‐Cuesta

Skaf

et al. 2023

Structural Concrete

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The use of Recycled aggregate (RA) enhances concrete sustainability. If used on an industrial‐scale, structural verification, and testing will be required to confirm that RA concrete can meet relevant industrial standards and the requirements of manufacturers, especially in the precast‐concrete industry. In this paper, an experimental campaign with the participation of a precast‐concrete manufacturer is reported. The objective is to test a self‐compacting concrete (SCC) mix, designed for structural applications, that contains maximum amounts of 100% coarse RA, in order to establish its compliance with the habitual requirements of precast‐concrete manufacturers. Thus, scaled beams (12 × 24 × 180 and 24 × 24 × 130 cm) were subjected to bending, shear‐bending, shear, and long‐term‐deflection tests. In addition, the performance of that SCC mix in the bending and shear‐bending tests was compared with the performance of an SCC mix of similar compressive strength containing 0% coarse RA. In the failure tests, the experimental results were between 1.5 and 3 times higher than the required values. The elastic behavior of both SCC mixes was also very similar in those tests, regardless of the amount of coarse RA, due to the robust design of the water and superplasticizer content of the SCC, which balanced the decreased flowability and the lower compressive strength of SCC that resulted from the additions of coarse RA. The SCC mix with 100% RA showed a lower load‐bearing capacity after failure and narrow compliance margins with the deflection limits of the long‐term‐deflection test. Even though the SCC mix with 100% RA met all the standard technical specifications of the precast‐concrete manufacturer, reference should always be made to the serviceability limit states that are applicable at the time of the structural design phase.

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Effect of silica fume and calcium carbonate whisker on interfacial behavior of near-surface-mounted FRP with magnesium phosphate cement

Cited by 6 publications

References 14 publications

Flexural Properties and Microstructure Mechanisms of Renewable Coir-Fiber-Reinforced Magnesium Phosphate Cement-Based Composite Considering Curing Ages

Flexural Properties and Microstructure Mechanisms of Renewable Coir-Fiber-Reinforced Magnesium Phosphate Cement-Based Composite Considering Curing Ages

Flexural Properties of Renewable Coir Fiber Reinforced Magnesium Phosphate Cement, Considering Fiber Length

Scaled concrete beams containing maximum levels of coarse recycled aggregate: Structural verifications for precast‐concrete building applications

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