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Polycarboxylate Superplasticizer-Modified Graphene Oxide: Dispersion and Performance Enhancement in Cement Paste [PDF]
NanomaterialsGraphene oxide (GO) significantly enhances cement hydration at the nanoscale; however, its tendency to complex and agglomerate with Ca2⁺ in cement paste remains an unresolved issue.
Haiming Zhang +4 more
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Taiyuan Ligong Daxue xuebao, 2023 Purposes A deep understanding of the pore structure of cement paste is important for improving the performance of cement-based materials. Methods In this paper, terahertz time-domain spectroscopy (THz-TDS) system was used to test the terahertz time ...
Wentao ZHANG +4 more
doaj +1 more source
Cement & Concrete Composites, 2021 The magneto-rheological responses of cement paste with nano-Fe3O4 particles are experimentally investigated. The estimated magneto-dynamic force between two neighboring nanoparticles and equilibrium movement velocity of the nanoparticles in cement-based ...
D. Jiao +5 more
semanticscholar +1 more source
Frontiers in Materials, 2022 In order to match the color difference between black asphalt mixture and light-colored cement grouting paste in semiflexible pavement, carbon black (CB) with four mass ratios (i.e., 2, 4, 6, and 8%) was incorporated into a rapid-hardening cement grouting
Deng Haibin +4 more
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Buildings, 2022 The early-age properties of nano-metakaolin (NMK) cement paste were examined from 15 min to 24 h, contacted between cement and water based on the electrochemical impedance spectroscopy (EIS) method.
Qiuchao Li +3 more
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Micromechanics of dental cement paste
Journal of the Mechanical Behavior of Biomedical Materials, 2021 Biodentine is a calcium silicate/calcium carbonate/zirconium dioxide/water-based dental replacement biomaterial, significantly outperforming the stiffness and hardness properties of chemically similar construction cement pastes. We here report the first systematic micromechanical investigation of Biodentine, combining grid nanoindentation with ...
Dohnalík, Petr +5 more
openaire +2 more sources
, 2021 The incorporation of conventional supplementary cementitious materials (e.g. fly ash) in concrete generally induces a longer setting time and inferior early-age strength.
Jian-Xin Lu +5 more
semanticscholar +1 more source
Corrosion law of cement paste under hydrogen sulfide conditions in natural gas wells
Frontiers in Materials, 2023 Downhole anticorrosion in sour gas (H2S or CO2) wells is one of the technical problems in petroleum engineering, and the corrosion law of cement paste, which is the “first barrier of the wellbore,” needs to be focused on.
Chaoyi She +5 more
doaj +1 more source
A micromechanical four-phase model to predict the compressive failure surface of cement concrete [PDF]
Fracture and Structural Integrity, 2014 In this work, a micromechanical model is used in order to predict the failure surface of cement concrete subject to multi-axial compression. In the adopted model, the concrete material is schematised as a composite with the following constituents: coarse
A. Caporale, R. Luciano
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Influences of Carbonated Recycled Concrete Fines on Cement Hydration
Buildings, 2023 The preparation of recycled concrete aggregate generates a lot of fines, which are obstacles for implementing the recycled concrete aggregate. In this work, carbonation treatment is applied to improve the properties of recycled concrete fine, and the ...
Jiake Zhang +3 more
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