Effect of adding organo-modified montmorillonite nanoclay on the performance of oil-well cement paste in CO2-rich environments

Moraes, Martimiano K.; Costa, Eleani Maria da

doi:10.1016/j.cemconcomp.2021.104400

Cited by 13 publications

(4 citation statements)

References 45 publications

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“…Based on the available information at that time, one way to decrease the swelling was to add exchangeable cations with a lower hydration energy, thus obtaining a more hydrophobic nano-montmorillonite. Some researchers based their studies on this method and used ammonium cations to decrease the hydrophilicity of MMT obtaining an organomodified montmorillonite [12,17,[22][23][24][25][26][27]. Other studies prepared the nanoclay particles by subjecting them to very high temperatures, in the range of 750-900 • C for 2 h, obtaining a nano-calcined montmorillonite clay [28][29][30][31].…”

Section: Types Of Nanoclay Used In Combination With Cementitious Mate...mentioning

confidence: 99%

“…A previous study [45] concluded that in case of nanoclay, the sonication process has a positive effect on the final mechanical properties of the concrete samples. They also stated that the maximum allowable percentage of nanoclay used in cement-based materials is 5% [22,45].…”

Section: Nanoclay Particles In Cementitious Materials-technological Flowmentioning

confidence: 99%

“…The layered structure of the organo-modified montmorillonite nanoclay (OMMT), obtained by cation exchange with quaternary ammonium cations, was extensively studied by means of SEM analysis [22]. Because MMT has a very high hydrophilicity, when it is introduced in the cement matrix, it begins to absorb the water from the cement matrix.…”

Section: Scanning Electron Microscopy (Sem) Analysismentioning

confidence: 99%

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Use of Clay and Titanium Dioxide Nanoparticles in Mortar and Concrete—A State-of-the-Art Analysis

et al. 2023

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In the past decades, nanomaterials have become one of the focal points in civil engineering research. When added to cement-based construction materials (e.g., concrete), it results in significant improvements in their strength and other important properties. However, the final mix characteristics depend on many variables that must be taken into account. As such, there is no general consensus regarding the influence upon the original material of certain nano-sized additives, the optimum dosage or the synergistic effect of two or more nano-materials. This is also the case for titanium dioxide (TiO2) and nanoclay (NC). The paper focuses on reporting the existing research data on the use of the above-mentioned materials when added to mortar and concrete. The collected data is summarized and presented in terms of strength and durability properties of cement mortar and concrete containing either TiO2 or NC. Both nano-materials have been proven, by various studies, to increase the strength of the composite, at both room and elevated temperature, when added by themselves in 0.5%~12% for TiO2 and 0.25%~6% for NC. It can be inferred that a combination of the two with the cementitious matrix can be beneficial and may lead to obtaining a new material with improved strength, elastic and durability properties that can be applied in the construction industry, with implications at the economic, social and environmental levels.

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Section: Types Of Nanoclay Used In Combination With Cementitious Mate...mentioning

confidence: 99%

Section: Nanoclay Particles In Cementitious Materials-technological Flowmentioning

confidence: 99%

Section: Scanning Electron Microscopy (Sem) Analysismentioning

confidence: 99%

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Use of Clay and Titanium Dioxide Nanoparticles in Mortar and Concrete—A State-of-the-Art Analysis

et al. 2023

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“…Because of their high aspect ratio, pozzolanic nature, and low cost, lamellar nanoparticles like clays are of particular interest among the various nanoparticle types [20]. Nanoclay is a very fine-grained material that occurs naturally and develops plasticity once it is mixed with water.…”

Section: Introductionmentioning

confidence: 99%

The Combined Effect of Nanoclay Powder and Curing Time on the Properties of Class G Cement

Ahmed,

Mahmoud,

Elkatatny

2023

Geofluids

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When the cement paste is subjected to stresses, the cement matrix and its characteristics are dramatically influenced, especially in the early ages of cement hydration when the cement properties have not yet settled. Nanoclay, which is made up of very small particles, was used to improve the properties of cement. In this study, the early-age performance of cement made with nanoclay powder for use in oil wells is assessed. Ten cement samples were made and cured at varying times (6, 12, 24, 48, and 72 hours), wherein 1% by weight of cement of nanoclay was used in five samples, and in the other five samples, there was no nanoclay present in the cement. Failure properties, petrophysical parameters, and elastic properties were studied for all the cement samples. Nuclear magnetic resonance (NMR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were all used to describe the cement samples and determine how different curing times affected the cement’s mineralogical and microstructural features. The results displayed that compressive and tensile strengths were shown to increase with curing time for both the base (control) and nanoclay cement samples; however, the compressive and tensile strengths of the nanoclay cement samples were found to be greater than the base sample by 20.2% and 17.9%, respectively. This is due to the presence of more calcium silicate hydrate in these samples. Nanoclay cement had 76.9% lower permeability than control cement, which can be related to the capacity of the nanoclay particles to fill the microstructure dominating the base samples as curing time increased. Young’s modulus of the cement was lowered by 1.8%, while Poisson’s ratio was increased by 2.7% when nanoclay was incorporated. Nanoclay cement has a 29.2% smaller porosity than regular cement, and this porosity increases as the cement cures. The novelty of this work is that several properties of the class G cement were evaluated at the early stage of hydration, where the nanoclay particles were used to improve these properties.

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Medium-Term Mechanical Properties of Cement Mortar Modified with Bentonite Nanoparticles

Bunea,

Toma,

Alexa-Stratulat

et al. 2024

Lecture Notes in Networks and Systems

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Effect of adding organo-modified montmorillonite nanoclay on the performance of oil-well cement paste in CO2-rich environments

Cited by 13 publications

References 45 publications

Use of Clay and Titanium Dioxide Nanoparticles in Mortar and Concrete—A State-of-the-Art Analysis

Use of Clay and Titanium Dioxide Nanoparticles in Mortar and Concrete—A State-of-the-Art Analysis

The Combined Effect of Nanoclay Powder and Curing Time on the Properties of Class G Cement

Medium-Term Mechanical Properties of Cement Mortar Modified with Bentonite Nanoparticles

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