Rheological properties and early mechanical strength of oil-well cement modified by hybrid nano-silica and nano-hexagonal boron nitride

Yun, Jiaqi; Zhao, Cunyuan; Li, Xuhui; Zhang, Weiguo; Liu, Haoya; Лиу, Баочанг

doi:10.1016/j.conbuildmat.2022.129291

Cited by 7 publications

(4 citation statements)

References 57 publications

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“…According to the literature research [40], the microstructure of hexagonal boro tride (h-BN) usually appears in circular or elliptical flake-like structures and is pron agglomeration, thereby tending to stack and form clustered formations. An SEM (s ning electron microscopy) analysis was performed on a selected area of the surface of meable concrete with a single admixture of h-BN, as indicated in area A in Figure Figure 15b shows that the surface of the permeable concrete with h-BN admixture tured clusters of hexagonal boron nitride.…”

Section: Micro-mechanism Analysis Of Pc Single-doped With H-bnmentioning

confidence: 99%

“…An EDS elemental analysis was conducte Figure 15b, with the results presented in Table 12 and Figure 17. According to the literature research [40], the microstructure of hexagonal boron nitride (h-BN) usually appears in circular or elliptical flake-like structures and is prone to agglomeration, thereby tending to stack and form clustered formations. An SEM (scanning electron microscopy) analysis was performed on a selected area of the surface of permeable concrete with a single admixture of h-BN, as indicated in area A in Figure 15a.…”

Section: Micro-mechanism Analysis Of Pc Single-doped With H-bnmentioning

confidence: 99%

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A Novel Pervious Concrete Improved by Hexagonal Boron Nitride and Basalt Fiber in Mechanical Properties, Permeability, and Micro-Mechanisms

Zhan,

Yin

2024

Buildings

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In order to overcome the limitations of traditional pervious concrete, which is difficult to balance in terms of both mechanical properties and permeability, this study proposed a novel and effective approach to improve the performances of pervious concrete (PC) based on hexagonal boron nitride (h-BN) and basalt fibers (BF). The mechanical properties and permeability tests of PC with single-doped or double-doped h-BN and BF were conducted first. Then the influence laws of h-BN and BF content on the compressive strength, flexural strength, porosity, and permeability coefficient for PC were revealed. Finally, the micro-mechanism effects of h-BN and BF on the performances of PC were explored by using a scanning electron microscope and an energy dispersive spectrometer. The results showed that the compressive strength of PC was increased with the increase in the h-BN content, and the flexural strength, porosity, and permeability coefficient increased first and then decreased. Meanwhile, with the increase in the BF content, the compressive strength and flexural strength of PC increased first and then decreased. Moreover, the compressive strength, flexural strength, porosity, and permeability coefficient of the proposed pervious concrete were 22.8 MPa, 5.17 MPa, 18.5%, and 5.09 mm/s, respectively, which were increases of 21.9%, 19.7%, 60.9%, and 42.2%, respectively, compared with ordinary permeable concrete when the optimal admixture combination was 15% fly ash, 0.08% h-BN, and 2.25% BF. This study can avoid the limitations of traditional pervious concrete and provide an efficient alternative way for improving the mechanical and permeability properties of pervious concrete.

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Section: Micro-mechanism Analysis Of Pc Single-doped With H-bnmentioning

confidence: 99%

Section: Micro-mechanism Analysis Of Pc Single-doped With H-bnmentioning

confidence: 99%

A Novel Pervious Concrete Improved by Hexagonal Boron Nitride and Basalt Fiber in Mechanical Properties, Permeability, and Micro-Mechanisms

Zhan,

Yin

2024

Buildings

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“…It is known that two-dimensional materials have excellent electrical, mechanical and thermal properties compared to their bulk forms (An et al, 2022). Hexagonal boron nitride (h-BN) is a two-dimensional material with a structure similar to graphene (Yun et al, 2022). h-BN has many uses with its excellent mechanical, electrical, thermal and chemical properties .…”

Section: Introductionmentioning

confidence: 99%

Effective Dye Adsorption with Cross-linked Hexagonal Boron Nitride Spheres

DANDIL,

DÜZGÜN

2023

Bilge International Journal of Science and Technology Research

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In this study, cross-linked spheres (CS) were synthesized with chitosan and hexagonal boron nitride (h-BN) to be used in Reactive Blue 3R (RB3R) and Red P4BN (RP4BN) dye adsorption from wastewater. Surface characteristics of the CS were investigated by Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray (EDX) analysis. The behavior of the adsorption processes with varying effective parameters were investigated. The highest removals were obtained at pH 3 for the RB3R and RP4BN removal processes as 62.8 and 74.2%, respectively. The equilibrium time of the processes was determined as 150 min. The pseudo-first-order kinetic model best explained the adsorption rates of the processes. The Freundlich isotherm model was fitted to define the adsorption mechanisms for both dyes. The positive ΔH values obtained as 24.27 and 16.59 kJ mol−1 for the RB3R and RP4BN adsorption processes, respectively, showed that the processes were endothermic. For the RB3R and RP4BN dye removal processes, ΔS values were calculated as 93.38 and 72.23 J mol−1K−1, respectively. Positive ΔS value indicates the processes that occur with an increase in disorder at the interface. The results described that the CS can be used in the adsorption of RB3R and RP4BN dyes from wastewater.

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“…Some studies have utilized nanomaterials (e.g., nano rubber and nano silica, etc.) to improve the mechanical properties or reduce the permeability of oil-well cements [14][15][16]. Moreover, modi ed epoxy resin and soap-free latex were used to improve the CO 2 -H 2 S corrosion resistance of oil-well cement [17,18].…”

Section: Introductionmentioning

confidence: 99%

Lightweight insulating oil-well cement filled with hollow glass microspheres and numerical simulation of its unsteady heat transfer process

Wang,

Ma,

Yuan

et al. 2023

Preprint

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During subsea natural gas extraction, the free water and gas molecules present in the reservoir and the low-temperature and high-pressure conditions of the subsea environment cause the formation of hydrates; the blockage of the wellbore due to these hydrates is a critical issue that affects flow safety. Located between the wellbore and casing, well cement plays an important role in strengthening the wellbore and sealing off the oil, gas, and water layers. A cement that exhibits optimal mechanical strength and enhanced thermal insulation properties can contribute to preventing hydrate formation. However, research on such materials is rare. In this study, lightweight and thermally insulated (LWTI) composites with the desired mechanical strength for deep-sea natural gas development were prepared using oil-well cement (OWC) as the matrix and hollow glass microspheres (HGM) as the filler. A two-phase mathematical model of the HGM/OWC LWTI composites was developed using the COMSOL Multiphysics software and solved using the finite element method. A transient heat transfer analysis of the HGM/OWC LWTI composites was performed. The effective thermal conductivities (keff) of the HGM/OWC LWTI composites were measured and the values agreed well with the simulation results. The keff of the composites was approximately 0.371 W/(m·℃) when the HGM (D51.8) content was 40 vol.%. Compared to the traditional OWC (thermal conductivity ~ 0.889 W/(m·℃)), the thermal insulation performance of the HGM/OWC LWTI composites was significantly improved. In addition, the density, mechanical properties, and water absorption of the HGM/OWC LWTI composites were investigated. The densities of the HGM/OWC LWTI composites were found to be low, ranging from 1.31 to 1.94 g/cm3. The HGM/OWC LWTI composites exhibited good compressive strength and low permeability. Thus, HGM/OWC LWTI has promising applications in the thermal insulation of cemented wellbores for deep-sea natural gas development.

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Rheological properties and early mechanical strength of oil-well cement modified by hybrid nano-silica and nano-hexagonal boron nitride

Cited by 7 publications

References 57 publications

A Novel Pervious Concrete Improved by Hexagonal Boron Nitride and Basalt Fiber in Mechanical Properties, Permeability, and Micro-Mechanisms

A Novel Pervious Concrete Improved by Hexagonal Boron Nitride and Basalt Fiber in Mechanical Properties, Permeability, and Micro-Mechanisms

Effective Dye Adsorption with Cross-linked Hexagonal Boron Nitride Spheres

Lightweight insulating oil-well cement filled with hollow glass microspheres and numerical simulation of its unsteady heat transfer process

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