Application of Polycarboxylate Superplasticizer in the Concrete

Huang, Xing; Li, Xiao Rong; Zhang, Da Wei; Xue, Chang Jun; Zhang, Ai Qin

doi:10.4028/www.scientific.net/msf.898.2076

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…Las investigaciones actuales, se centran en la influencia del agente reductor de agua sobre las propiedades mecánicas del hormigón. Entre los agentes reductores de agua tenemos, entre otros, el naftaleno y melamina Huang & Li, (2015). Los investigadores He, Zhang, Kong, & Wang, (2018) indican que los plastificantes PCE afectan significativamente las propiedades reológicas de las pastas de cemento porque la densidad carboxílica de PCE influye en gran medida en el rendimiento de dispersión de los superplastificante.…”

Section: Introductionunclassified

Aditivo fluidificante con copolímero para mejorar la resistencia a la comprensión del hormigón

Gutiérrez¹,

Vallejos²,

Reyes³

et al. 2021

Campus

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Aditivo fluidificante con copolímero para mejorar la resistencia a la comprensión del hormigón resumenEl objetivo de esta investigación es hacer un análisis documental de investigaciones realizadas con el uso de aditivos fluidizantes, a base de copolímeros, con la finalidad de encontrar hormigones que cumplan con las exigencias del mercado. La metodología consistió en hacer un análisis documental/bibliográfica de investigaciones utilizando buscadores disponibles. Se utilizó como filtro de búsqueda el período del 2017 hasta marzo 2021, obteniendo como resultado, investigaciones que obtuvieron un Slump Flow de 32.5 cm., para una dosis de 0.3% de aditivo, encontrándose en un rango de 0.25% a 0.40%. El aditivo sintetizado en forma de peine, con codificación PCE-2, tuvo una resistencia a la compresión de 85 MPa con adiciones minerales, ensayado a los 28 días con una relación a/c de 0.30. Para un PC-3, se obtuvo una resistencia a la compresión de 73 MPa, sin adiciones minerales, ensayado a los 28 días a una relación a/c = 0.30. El valor promedio de resistencia a la compresión, sin adiciones minerales, fue de 61 MPa, con una relación a/c entre 0.25 a 0.30. Se concluyó que el uso de aditivos plastificante, basados en copolímeros, tiene una influencia positiva en las propiedades del hormigón, reduciendo el agua, mejorando las resistencias altas iniciales y finales, así como la permeabilidad. Palabras clave:Aditivo superplastificante; copolímero de injerto; ensayo de asentamiento; resistencia; cadenas laterales absTracT To contribute to the solution, we set the objective of making a documentary analysis of research carried out with the use of fluidizing additives, based on copolymers, in order to find concretes that meet market demands. The methodology consisted of making a documentary / bibliographic analysis of research using Flow additive with copolymer to improve compressive strength of concrete

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Section: Introductionunclassified

Aditivo fluidificante con copolímero para mejorar la resistencia a la comprensión del hormigón

Gutiérrez¹,

Vallejos²,

Reyes³

et al. 2021

Campus

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“…But this mixture is unstable, and will be layered after being placed for a certain period. Some scholars [2][3][4] introduced some defoaming components into molecules of PCE by the way of chemical grafting to solve instability problem of mixture, but the dispersing ability of PCE is decreased largely.…”

Section: Introductionmentioning

confidence: 99%

The Performance of Low Air-Entraining Polycarboxylate Superplasticizer

Ding

2015

AMR

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A new low air-entraining polycarboxylate superplasticizer (denoted as L-PCE) was synthesized by using oxirane/epoxypropane (denoted as EO/PO) block-polyether as one of monomers. The molecular structure of EO/PO block-polyether monomer was characterized by proton nuclear magnetic resonance spectroscopy (denoted as 1H NMR). The pore parameters, workability, and compressive strength of the concrete added with L-PCE were compared to that added with conventional polycarboxylate superplasticizer (denoted as G-PCE) or the G-PCE compounding with defoaming agent. The results demonstrate that the air entraining performance of the L-PCE has been greatly improved than the G-PCE and the G-PCE compounding with defoaming agent. Then the problems, which the workability and slumps of fresh concrete decrease when G-PCE compounding with defoaming agent are added, can be solved. What is more, the interior pore structure of concrete has been optimized. The spacing factor of hardened concrete added with the L-PCE is 27% lower than that added with the G-PCE compounding with defoaming agent. And the 28d strength of the concrete added with the L-PCE is 10% higher than that added with the G-PCE compounding with defoaming agent.

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Study on Preparation and Mechanism of Concrete Slump Retaining Agent

Guan¹

2023

J. Phys.: Conf. Ser.

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Using acrylic acid and polyether polymer as the main raw materials, with hydroxyethyl acrylate monomer free radical copolymerization of polycarboxylic acid slump inhibitor, has the effect of reducing the slump loss of concrete. The slow release rate of concrete slump retaining agent synthesized with different ester ratios was studied, and the effects of different ester ratios, different ester ether ratios, and different ambient temperatures on the dispersion, dispersion retention, and hydrolysis rate of polycarboxylic acid slump retaining agent were systematically studied. The knowledge basis for the development of the slump-retaining agent with different sustained release effects. In engineering applications, the working performance of concrete can be controlled more effectively according to the length of the slow release time.

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Application of Polycarboxylate Superplasticizer in the Concrete

Cited by 7 publications

References 15 publications

Aditivo fluidificante con copolímero para mejorar la resistencia a la comprensión del hormigón

Aditivo fluidificante con copolímero para mejorar la resistencia a la comprensión del hormigón

The Performance of Low Air-Entraining Polycarboxylate Superplasticizer

Study on Preparation and Mechanism of Concrete Slump Retaining Agent

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