Study of keto-hydrazide crosslinking effect in acrylic latex applied to Portland cements with respect to physical properties

Zárybnická, Lucie; Pokorný, Jaroslav; Machotová, Jana; Ševčík, Radek; Šál, Jiří; Viani, Alberto

doi:10.1016/j.conbuildmat.2023.130897

Cited by 5 publications

(4 citation statements)

References 72 publications

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“…As the hydration reaction proceeds, these particles accumulate between the pores and the interface transition zones, adsorbing and polymerizing in situ into thin, flexible films. This process forms a network structure that enhances the density and impermeability of cement-based materials, as observed in previous studies [ 7 , 78 ]. Additionally, the interface structures between organic and inorganic materials in polymer-modified cement-based materials create interactions between atoms and molecules in the polymers and the hydration products of cement-based materials through hydrogen bonds, van der Waals forces, and other mechanisms [ 20 ].…”

Section: Mechanism Of Acrylate-lotion-modified Cement-based Materialssupporting

confidence: 65%

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Mechanism of Acrylate Emulsion-Modified Cement-Based Materials

Su,

He,

et al. 2024

Molecules

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Polymer-modified cement-based materials have been widely used in building materials. Polymers play a crucial role in improving the performance of cement-based materials. At the same time, different polymers are added according to specific special requirements to meet the needs of the industry. Therefore, this paper reviewed the research on the performance and mechanism of acrylic lotion in modifying cement-based materials. Firstly, the role of acrylate lotion in the improvement of the volume stability, mechanical properties, and durability of cement-based materials was discussed to explore the advantages and disadvantages further, optimize the application of polymer in cement-based materials according to the performance improvement, and amplify the advantages of polymer modification. Secondly, the physicochemical mechanism of acrylate-lotion-modified cement-based materials was discussed, and the products and reactants of acrylate lotion in the reaction process of cement-based materials, as well as the interaction mechanism of acrylic lotion and cement hydrates, were clarified. Cement hydration is a crucial step in exploring the mechanism of polymer-modified cement-based materials. Due to the acrylate lotion filled on the cement surface and the physical and chemical interaction between them, the cement hydration is delayed, resulting in the cement retarding phenomenon. This paper describes its mechanism. Finally, the improvement effect of acrylate lotion on the performance of cement-based materials was reviewed, the research methods of mechanism research on acrylate-lotion-modified cement-based materials were evaluated, and suggestions for future research methods were provided.

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Section: Mechanism Of Acrylate-lotion-modified Cement-based Materialssupporting

confidence: 65%

“… Second electronic image of ethylene vinyl acetate modified cement. ( a )The absorption of polymer particles on the surface of cement particles; ( b ) porous C-S-H caused by polymer particles; ( c ) the local pore morphology of porous C-S-H; ( d ) formation of a polymer film on the surface of glass [ 78 ]. …”

Section: Figurementioning

confidence: 99%

Mechanism of Acrylate Emulsion-Modified Cement-Based Materials

Su,

He,

et al. 2024

Molecules

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“…The latex film also connected the hydration products to produce a more complete cement. The formation of hydrated calcium silicate and Ca(OH) 2 was completed by the cement composite with the extension of the corrosion period, producing a more complete form [36]. Simultaneously, the surface of the b 1 , c 1 , and d 1 cement composite matrix showed signs of corrosion carbonization, and, over time, loose free calcium silicate was progressively created [37,38].…”

Section: Effect Of Latex On Microstructure Of Cementmentioning

confidence: 99%

Preparation and Application of CO2-Resistant Latex in Shale Reservoir Cementing

Jiang,

Zheng,

Zhu

et al. 2024

Processes

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With the application of CO2 fracturing, CO2 huff and puff, CO2 flooding, and other stimulation technologies in shale reservoirs, a large amount of CO2 remained in the formation, which also lead to the serious corrosion problem of CO2 in shale reservoirs. In order to solve the harm caused by CO2 corrosion, it is necessary to curb CO2 corrosion from the cementing cement ring to ensure the long-term stable exploitation of shale oil. Therefore, a new latex was created using liquid polybutadiene, styrene, 2-acrylamide-2-methylpropanesulfonic acid, and maleic anhydride to increase the cement ring’s resistance to CO2 corrosion. The latex’s structure and characteristics were then confirmed using infrared, particle size analyzer, thermogravimetric analysis, and transmission electron microscopy. The major size distribution of latex is between 160 and 220 nm, with a solid content of 32.2% and an apparent viscosity of 36.8 mPa·s. And it had good physical properties and stability. Latex can effectively improve the properties of cement slurry and cement composite. When the amount of latex was 8%, the fluidity index of cement slurry was 0.76, the consistency index was 0.5363, the free liquid content was only 0.1%, and the water loss was reduced to 108 mL. At the same time, latex has a certain retarding ability. With 8% latex, the cement slurry has a specific retarding ability, is 0.76 and 0.5363, has a free liquid content of just 0.1%, and reduces water loss to 108 mL. Moreover, latex had certain retarding properties. The compressive strength and flexural strength of the latex cement composite were increased by 13.47% and 33.64% compared with the blank cement composite. A long-term CO2 corrosion experiment also showed that latex significantly increased the cement composite’s resilience to corrosion, lowering the blank cement composite’s growth rate of permeability from 46.88% to 19.41% and its compressive strength drop rate from 27.39% to 11.74%. Through the use of XRD and SEM, the latex’s anti-corrosion mechanism, hydration products, and microstructure were examined. In addition to forming a continuous network structure with the hydrated calcium silicate and other gels, the latex can form a latex film to attach and fill the hydration products. This slows down the rate of CO2 corrosion of the hydration products, enhancing the cement composite’s resistance to corrosion. CO2-resistant toughened latex can effectively solve the CO2 corrosion problem of the cementing cement ring in shale reservoirs.

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“…More detailed descriptions of both these procedures are available in Pokorný et al's study [52]. The material properties related to one-dimensional water transport (details reported elsewhere [53]) via capillary forces through a porous system of siliceous materials were determined with respect to the standard EN 1015-18 [54]. Thermal-physical properties were measured with the device ISOMET 2114 (Applied Precision, Ltd., Bratislava, Slovakia), which operates on the transient measuring method.…”

Section: Testing Proceduresmentioning

confidence: 99%

Utilization of Waste-Expanded Thermoplastic as a Sustainable Filler for Cement-Based Composites for Greener Construction

Pokorný,

Zárybnická,

Ševčík

et al. 2024

Buildings

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Plastics represent an integral part of our everyday lives, with various functions from packaging materials to insulation layers in our buildings. Pure expanded polystyrene (EPS) is a good example of a fully recyclable material. However, once polluted with other materials or substances, EPS becomes a serious environmental burden. In this work, waste EPS for the production of greener building composites with balanced properties and utility value was investigated. Natural aggregate (2/4 mm) was substituted with corresponding fractions of a thermoplastic alternative in portions of 25, 50, 75, and 100 vol.%. The comprehensive experimental investigation evaluated physical and mechanical properties, heat transport and accumulation, and water absorption characteristics. Due to the uniformly distributed plastic particles in the hardened cement-based matrix, the data revealed an important reduction in the dead weight of produced mortars, which also reduced thermal conductivity by up to 47%. On one hand, lightweight mortars showed partially reduced mechanical resistivity; on the other hand, the EPS bead-modified structure turned out to be effective in liquid water transport reduction.

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Study of keto-hydrazide crosslinking effect in acrylic latex applied to Portland cements with respect to physical properties

Cited by 5 publications

References 72 publications

Mechanism of Acrylate Emulsion-Modified Cement-Based Materials

Mechanism of Acrylate Emulsion-Modified Cement-Based Materials

Preparation and Application of CO2-Resistant Latex in Shale Reservoir Cementing

Utilization of Waste-Expanded Thermoplastic as a Sustainable Filler for Cement-Based Composites for Greener Construction

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