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Multiscale Poromechanics of Wet Cement Paste [PDF]
Proceedings of the National Academy of Sciences, 2019 Capillary effects such as imbibition-drying cycles impact the mechanics of granular systems over time. A multiscale poromechanics framework was applied to cement paste, that is the most common building material, experiencing broad humidity variations ...
Bazant, Martin Z. +4 more
core +6 more sources
Study on Utilization of Carboxyl Group Decorated Carbon Nanotubes and Carbonation Reaction for Improving Strengths and Microstructures of Cement Paste [PDF]
Nanomaterials, 2016 Carbon nanotubes (CNTs) have excellent mechanical properties and can be used to reinforce cement-based materials. On the other hand, the reaction product of carbonation with hydroxides in hydrated cement paste can reduce the porosity of cement-based ...
Xiantong Yan +4 more
doaj +5 more sources
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
doaj +2 more sources
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
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
doaj +1 more source
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
doaj +1 more source
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
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
doaj +2 more sources
Diffusion-reaction modelling of the degradation of oil-well cement exposed to carbonated brine [PDF]
, 2017 The essential aspects of a diffusion-reaction model in development for the degradation process of oil-well cement exposed to carbonated brine are presented in this paper.
Carol, Ignacio +3 more
core +3 more sources