Utilization of high-range water reducing admixture having air-entraining agents in cementitious systems

Şahin, Hatice Gizem; Mardani‐Aghabaglou, Ali; Özen, Süleyman; Emin, Ayvaz

doi:10.1016/j.jobe.2022.105565

Cited by 13 publications

(6 citation statements)

References 92 publications

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“…Şahin et al [ 24 , 25 ] systematically investigated various monomers, ratios of different monomers, and adjusted reaction processes. A series of polycarboxylate superplasticizers (PCEs) was synthesized using allyl alcohol-polyethylene glycol (APEG, EO = 45), acrylic acid (AA), maleic anhydride (MAL), 2-acrylamido-2-methylpropane sulfonic acid (AMPS), and ammonium persulfate (APS) as raw materials.…”

Section: Synthesis Of Pcementioning

confidence: 99%

Synthesis and Modification of Polycarboxylate Superplasticizers—A Review

Xia,

Shi,

Xiang

et al. 2024

Materials

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The molecular-scale structural changes in polycarboxylic superplasticizer (PCE) can influence dispersion and water retention. Polycarboxylate superplasticizer, synthesized using different methods, may alter dispersion and water-reducing effects. The synthesis of PCE involves creating a novel macromolecular monomer with a controllable molecular mass, adjustable lipophilic, and hydrophilic moieties, as outlined in this study. This article reviews processes for synthesizing polycarboxylates and identifies the optimal method through orthogonal experiments to produce a modified polycarboxylate superplasticizer (PCE-P). The study investigated the effects of different PCE types and concentrations on the surface tension, fluidity, and ζ potential of cement paste. PCE-P, synthesized at room temperature, showed comparable performances in initial hydration and conversion rate in cement to PCE synthesized at high temperatures. PCE-P exhibited an increased slump but had a wider molecular weight distribution and longer main and side chains, leading to a 24.04% decrease in surface tension, indicating a good dispersibility.

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Section: Synthesis Of Pcementioning

confidence: 99%

Synthesis and Modification of Polycarboxylate Superplasticizers—A Review

Xia,

Shi,

Xiang

et al. 2024

Materials

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“…Incorporating air-entraining admixtures into the concrete mix creates small, evenly distributed air voids within the concrete [163]. These air voids provide space for the expansion of freezing water, reducing internal pressure and preventing frost damage, early freezing, and freeze-thaw deterioration [164].…”

Section: Air Entrainmentmentioning

confidence: 99%

An Overview of Smart Materials and Technologies for Concrete Construction in Cold Weather

Nilimaa

Zhaka

2023

Eng

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Cold weather conditions pose significant challenges to the performance and durability of concrete materials, construction processes, and structures. This paper aims to provide a comprehensive overview of the material-related challenges in cold weather concrete construction, including slow setting, reduced curing rate, and slower strength development, as well as frost damage, early freezing, and freeze–thaw actions. Various innovative materials and technologies may be implemented to address these challenges, such as optimizing the concrete mix proportions, chemical admixtures, supplementary cementitious materials, and advanced construction techniques. The paper also examines the impact of weather-related challenges for personnel, equipment, and machinery in cold environments and highlights the importance of effective planning, communication, and management strategies. Results indicate that the successful implementation of appropriate strategies can mitigate the challenges, reduce construction time, and enhance the performance, durability, and sustainability of concrete structures in cold and freezing temperatures. The paper emphasizes the importance of staying updated about the latest advancements and best practices in the field. Future trends include the development of smart and functional concrete materials, advanced manufacturing and construction techniques, integrated design, and optimization of tools, all with a strong focus on sustainability and resilience.

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“…Damages due to freeze-thaw effects are common in countries where the air temperature drops below zero. [114][115][116][117][118][119][120][121] The freeze-thaw resistance of 3DPC mixtures should be investigated and developed in order to make their use widespread, especially in cold regions. It is clear that the freeze-thaw resistance of 3DPC specimens and the methods that can be used to increase this resistance are different from conventional concretes.…”

Section: Freeze-thaw Resistancementioning

confidence: 99%

“…Damages due to freeze–thaw effects are common in countries where the air temperature drops below zero 114–121 . The freeze–thaw resistance of 3DPC mixtures should be investigated and developed in order to make their use widespread, especially in cold regions.…”

Section: Assessment Of Strength and Durability Performance Of 3dpc Mi...mentioning

confidence: 99%

Mechanical properties, durability performance and interlayer adhesion of 3DPC mixtures: A state‐of‐the‐art review

Şahin

Mardani‐Aghabaglou

2023

Structural Concrete

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In this study, the strength and durability performance of 3D printing concrete mixtures (3DPC) were examined in terms of the materials used in their production and printing process parameters (interlayer interval time, printing speed, and nozzle shape). Due to the anisotropic nature of 3DPC, it was understood that the compressive strength depends on the loading direction. It was emphasized that it is necessary to control the shrinkage behavior of 3DPC mixtures due to the lack of formwork and the high dosage of binders. It was reported that the interlayer adhesion of 3DPC is highly dependent on the interlayer interval time and printing speed parameters. It was understood that nozzle shape and standoff distance affect the mechanical properties and surface roughness of 3DPC specimens, and this effect is more pronounced in mixtures with high static yield stress values.

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Utilization of high-range water reducing admixture having air-entraining agents in cementitious systems

Cited by 13 publications

References 92 publications

Synthesis and Modification of Polycarboxylate Superplasticizers—A Review

Synthesis and Modification of Polycarboxylate Superplasticizers—A Review

An Overview of Smart Materials and Technologies for Concrete Construction in Cold Weather

Mechanical properties, durability performance and interlayer adhesion of 3DPC mixtures: A state‐of‐the‐art review

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