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A platform for research: civil engineering, architecture and urbanism
The effect of SiO2/PEGMA/AA nanocomposites on hydration process and mechanical properties of oil well cement
https://orcid.org/0000-0002-4409-2133
Highlights The SiO2/PEGMA/AA nanocomposites were prepared by grafting PEGMA and AA on the surface of SiO2 nanoparticles. The SiO2/PEGMA/AA nanocomposites markedly improve their dispersion stability and the fluidity of cement slurries. The SiO2/PEGMA/AA nanocomposites can efficiently promote the hydration process and densify the microstructure of hardened cement pastes. The SiO2/PEGMA/AA nanocomposites with core–shell structure combines the advantages of SiO2 nanoparticles and superplasticizers to significantly improve the compressive strength of oil well cement.
Abstract SiO2 nanoparticles coated with PEGMA and AA (SiO2/PEGMA/AA) were synthesized by radical polymerization. The chemical structure and particle size distribution of the SiO2/PEGMA/AA nanocomposites were characterized. The zeta potential, rheological properties, hydration rate, hydration products, microstructure, pore structure and compressive strength of oil well cement were investigated. The results showed that the core–shell structure endowed the SiO2/PEGMA/AA nanocomposite with multiple functions, which could not only efficiently facilitate the fluidity of the cement pastes, but also significantly promote the cement hydration and densify the microstructure of hardened cement pastes. The compressive strength of cement with 2 wt% SiO2/PEGMA/AA nanocomposites was increased by 45.6% curing for 28 days, which was much better than cement with the physical blending of SiO2 nanoparticles and PEGMA/AA superplasticizer.
The effect of SiO2/PEGMA/AA nanocomposites on hydration process and mechanical properties of oil well cement
https://orcid.org/0000-0002-4409-2133
Highlights The SiO2/PEGMA/AA nanocomposites were prepared by grafting PEGMA and AA on the surface of SiO2 nanoparticles. The SiO2/PEGMA/AA nanocomposites markedly improve their dispersion stability and the fluidity of cement slurries. The SiO2/PEGMA/AA nanocomposites can efficiently promote the hydration process and densify the microstructure of hardened cement pastes. The SiO2/PEGMA/AA nanocomposites with core–shell structure combines the advantages of SiO2 nanoparticles and superplasticizers to significantly improve the compressive strength of oil well cement.
Abstract SiO2 nanoparticles coated with PEGMA and AA (SiO2/PEGMA/AA) were synthesized by radical polymerization. The chemical structure and particle size distribution of the SiO2/PEGMA/AA nanocomposites were characterized. The zeta potential, rheological properties, hydration rate, hydration products, microstructure, pore structure and compressive strength of oil well cement were investigated. The results showed that the core–shell structure endowed the SiO2/PEGMA/AA nanocomposite with multiple functions, which could not only efficiently facilitate the fluidity of the cement pastes, but also significantly promote the cement hydration and densify the microstructure of hardened cement pastes. The compressive strength of cement with 2 wt% SiO2/PEGMA/AA nanocomposites was increased by 45.6% curing for 28 days, which was much better than cement with the physical blending of SiO2 nanoparticles and PEGMA/AA superplasticizer.
The effect of SiO2/PEGMA/AA nanocomposites on hydration process and mechanical properties of oil well cement
https://orcid.org/0000-0002-4409-2133
Highlights The SiO2/PEGMA/AA nanocomposites were prepared by grafting PEGMA and AA on the surface of SiO2 nanoparticles. The SiO2/PEGMA/AA nanocomposites markedly improve their dispersion stability and the fluidity of cement slurries. The SiO2/PEGMA/AA nanocomposites can efficiently promote the hydration process and densify the microstructure of hardened cement pastes. The SiO2/PEGMA/AA nanocomposites with core–shell structure combines the advantages of SiO2 nanoparticles and superplasticizers to significantly improve the compressive strength of oil well cement.
Abstract SiO2 nanoparticles coated with PEGMA and AA (SiO2/PEGMA/AA) were synthesized by radical polymerization. The chemical structure and particle size distribution of the SiO2/PEGMA/AA nanocomposites were characterized. The zeta potential, rheological properties, hydration rate, hydration products, microstructure, pore structure and compressive strength of oil well cement were investigated. The results showed that the core–shell structure endowed the SiO2/PEGMA/AA nanocomposite with multiple functions, which could not only efficiently facilitate the fluidity of the cement pastes, but also significantly promote the cement hydration and densify the microstructure of hardened cement pastes. The compressive strength of cement with 2 wt% SiO2/PEGMA/AA nanocomposites was increased by 45.6% curing for 28 days, which was much better than cement with the physical blending of SiO2 nanoparticles and PEGMA/AA superplasticizer.
The effect of SiO2/PEGMA/AA nanocomposites on hydration process and mechanical properties of oil well cement
Wang, Gang (author) / Tan, Hua (author) / Zhu, Jiaping (author) / Lu, Chunjing (author) / Sun, Ao (author)
2022-03-01
Article (Journal)
Electronic Resource
English
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