Mechanical Attributes of Uniaxial Compression for Calcium Carbonate Whisker Reinforced Oil Well Cement Pastes

Yang, Yuanyi; Shun, Fu; Li, Xingkui

doi:10.1155/2017/2939057

Cited by 11 publications

(9 citation statements)

References 18 publications

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“…The traditional cement based materials are very brittle and have a low tensile strength [1,2]. The different commercial fibers are used as reinforcement in cementitious composites to reduce the brittleness under static and dynamic loading [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Calcium Carbonate Whisker in Cementitious Composites

Cao

Khan

Ahmed

2020

Period. Polytech. Civil Eng.

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Cementitious composites are porous material having complex structure system consist of hydration products, un-hydrated cement particles and pore solutions of various scales. Calcium carbonate whisker is a new type of low cost micro-scale filler fiber gaining popularity in the field of construction materials. However, addition of whisker has effect on physical, mechanical and microstructural characteristics of cementitious composites. Also, the low production cost of whisker will make the use of micro fiber more extensive in large scale construction projects. In this study, the effect of calcium carbonate whisker on physical, mechanical and microstructural properties of cementitious composites with different fiber contents are investigated. The fluidity, drying shrinkage, pore structure, impact resistance, compressive, flexural and splitting-tensile strength of whisker-mortar are considered. The scanning electron microscopy analysis is also performed to examine the microstructural and toughening mechanism of whisker reinforced composites.It was concluded that the addition of calcium carbonate whisker up to 10 % improves the physical and mechanical properties of cementitious composites and is suggested to be the optimize content. The calcium carbonate whisker also resists the crack propagation at micro scale and showed the toughening mechanism with better interfacial properties between whisker and matrix.

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Section: Introductionmentioning

confidence: 99%

Effectiveness of Calcium Carbonate Whisker in Cementitious Composites

Cao

Khan

Ahmed

2020

Period. Polytech. Civil Eng.

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“…Moreover, they indicated that the rheological properties of mortars containing CaCO 3 whisker complied with the Bingham model and with the whisker content of 1.5%, and mortars exhibited the uniform distribution [11]. Yang et al reported that CaCO 3 whisker with the addition of 10% could remarkably enhance the tensile strength of cement paste, and the constitutive relationship of the stress-strain curve of CaCO 3 whisker-reinforced cement pastes and toughening mechanism of CaCO 3 whisker were illustrated as well [12]. On the other hand, the microsize of CaCO 3 whisker enables the combined use of it with various large-sized fibers in order to achieve the multiscale cracking resistance of cementitious materials [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 77%

“…Whiskers can be categorized as organic and inorganic whiskers, and organic whisker such as cellulosic whisker is frequently used for reinforcing the polymer materials [6,7]. With respect to inorganic whisker, calcium carbonate whisker [8][9][10][11][12], calcium sulphate whisker [13], zinc oxide whisker [14], silicon carbide whisker [15], and potassium titanate whisker [16] are commonly used, and among which, CaCO 3 whisker has the most extensive application in the reinforcement of cementitious materials. Previous studies have shown that CaCO 3 whisker has the capacity to improve the mechanical strength and enhance the flexural toughness of cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcium Carbonate Whisker and Fly Ash on Mechanical Properties of Cement Mortar under High Temperatures

Wang

Zhang

Zhao

et al. 2019

Advances in Materials Science and Engineering

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Calcium carbonate (CaCO3) whisker, as a new type of microfibrous material, has been extensively used in the reinforcement of cementitious materials. However, the combined effect of CaCO3 whisker and fly ash on mechanical properties of cementitious materials under high temperatures was still unknown. In this study, the coupling effect of CaCO3 whisker, and fly ash on mechanical properties of the cement was investigated. Two sets of cement mortars were fabricated, including CaCO3 whisker-based mortar which contained 0 wt.%, 5 wt.%, 10 wt.%, 15 wt.%, and 20 wt.% CaCO3 whisker as cement substitution and CaCO3 whisker-based fly ash mortar which contained 30 wt.% fly ash in addition to 0 wt.%, 5 wt.%, 10 wt.%, 15 wt.%, and 20 wt.% CaCO3 whisker as cement substitution. Mass loss, compressive strength, and flexural strength of these two sets of specimens before and after being subjected to high temperatures of 200°C, 400°C, 600°C, 800°C, and 1000°C were measured. Based on the results of the aforementioned tests, load-deflection test was performed on the specimen which exhibited the superior performance to further study its mechanical behavior after exposure to high temperatures. Moreover, microstructural analysis, such as mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM), was conducted to reveal the damage mechanism of high temperature and to illustrate the combined effect of CaCO3 whisker and fly ash on high-temperature resistance of the cement. Results showed that fly ash could improve the high-temperature performance of CaCO3 whisker-based mortar before 600°C and limit the loss of strength after 600°C.

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“…An enlarged rectangular frame is shown in Figure 7(b) and depicted in Figure 7(c), which highlights the large CW material, while the smaller-sized material may be CW or AFt. CW clusters will play a filling role similar to micro-aggregates in the ITZ near the PVA fiber, improving the pore structure in the ITZ of the PVA fiber (27).…”

Section: Microstructure and Mechanism Analysis Of The Fiber/matrix In...mentioning

confidence: 99%

Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials

Cao

et al. 2022

materconstrucc

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The uniaxial tensile properties of multi-scale fiber-reinforced cementitious material (MSFRCM) with steel and polyvinyl alcohol (PVA) fibers and calcium carbonate whisker (CW) were studied. The results showed that CW improved the uniaxial tensile stiffness, strength, peak strain, and toughness of the steel-PVA hybrid fiber-reinforced cementitious material. The CW not only played a role in the small deformation stage but also improved the load holding capacity and toughness of the hybrid fiber-reinforced cementitious material during the large deformation stage. Computational models to assess the uniaxial tensile strength and toughness of the MSFRCM were established. Microstructure observations showed that the steel and PVA fibers formed a weak interfacial transition zone (ITZ) due to the “wall effect.” The CW effectively optimized the structure of the ITZ of the steel and PVA fibers through physical and chemical effects, such as filling, bridging, improving Ca(OH)2 orientation, and chemical effects. The steel fibers, PVA fibers, and CW in the MSFRCM bridged cracks at the macro, mesoscopic, and microscopic levels, respectively. As a result, we observed a fiber chain effect that improved the positive hybrid effect between the multi-scale fibers.

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Mechanical Attributes of Uniaxial Compression for Calcium Carbonate Whisker Reinforced Oil Well Cement Pastes

Cited by 11 publications

References 18 publications

Effectiveness of Calcium Carbonate Whisker in Cementitious Composites

Effectiveness of Calcium Carbonate Whisker in Cementitious Composites

Effect of Calcium Carbonate Whisker and Fly Ash on Mechanical Properties of Cement Mortar under High Temperatures

Uniaxial tensile behavior and mechanism characterization of multi-scale fiber-reinforced cementitious materials

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