The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste

Huang, Chunlong; Cheng, Zirui; Zhao, Jihui; Wang, Yiren; Pang, Jie

doi:10.3390/cryst11070731

Cited by 7 publications

(2 citation statements)

References 29 publications

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“…The appearance of this phenomenon could be explained by the following point of view. The addition of PCEs reduced the degree of agglomeration of cement particles and increased the quantity of cement particles participating in the hydration reaction through charge repulsion and steric hindrance, resulting in a higher hydration temperature peak [33]. The degree of temperature increase of cement paste with Type B and C was slightly higher than that cement paste with Type A.…”

Section: Fig 8 Adsorption Amount Of Pces With Different Dosagementioning

confidence: 94%

Properties of Polycarboxylate Superplasticizers with Different Molecular Structure: A Comparative Study

Yang

Zhang

Mao

et al. 2023

KEM

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Polycarboxylate superplasticizers (PCEs) with different molecular structure had been synthesized and characterized by FT-IR. PCEs were mainly included polyester (Type A), polyether (Type B) and ester ether copolymer (Type C). The application properties, adsorption behaviors and hydration process were investigated. The TOC was used to measure the adsorption amount, and crystal components in the hydration products were detected by XRD analysis. Test showed that Type B had the excellent performance, including large water reduction rate and strong adsorption capacity. The ester group in the molecular structure of Type A and C could improve the fluidity retention of cement paste, but the hydrolysis of ester group also weakened adsorption capacity on cement particles. In addition, in the cement-water-PCEs system, the difference of molecular structure would affect the early hydration process of cement slurry. For example, research indicated that the main hydration peak and maximum elevated temperature was delayed by adding PCEs. Through the examination of hydration products, it revealed that the intensity of calcium hydroxide (CH) and ettringite (AFt) peaks with Type B was higher than the other. The concrete application performance results indicated that PCEs had the basically equal contribution to the compressive strength. Keywords molecular structure; ester group; adsorption; hydration products; compressive strength

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Section: Fig 8 Adsorption Amount Of Pces With Different Dosagementioning

confidence: 94%

Properties of Polycarboxylate Superplasticizers with Different Molecular Structure: A Comparative Study

Yang

Zhang

Mao

et al. 2023

KEM

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“…Although the CSC has the increasing performance advantages, its large-scale application is limited resulting from the scarcity of alumina raw materials (Huang et al, 2020), for which the use of ferrite materials to partially replace aluminum materials in calcium sulphate aluminate cement to make ferrite aluminate cement (FAC) an attempt to solve this problem (Bullerjahn et al, 2014). Huang et al (2021) investigated the effects of the superplasticizers on workability of FAC pastes. As the experimental study showed, in the FAC pastes with W/C of 0.29, when the fluidity was 180 mm, 240 mm and 270 mm, the required dosage of polycarboxylate acid-based water reducing agent (PC) was lower than that of the melamine-based water reducing agent (MA) and aliphatic-based water reducing agent (AP), which indicated that the PC had slow setting effect and better dispersion capacity in comparison.…”

Section: Calcium Sulfoaluminate Cement Concrete and Ferrite Aluminate...mentioning

confidence: 99%

Effect of Dose and Types of the Water Reducing Admixtures and Superplasticizers on Concrete Strength and Durability Behaviour: A Review

Wang,

Fang,

Zheng

2024

Journal of Civil Engineering and Management

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As one of the concrete admixtures, water reducing admixtures and superplasticizers are usually used to reduce the mixing water volume and improve the performance of the harden concrete while maintaining better workability of the fresh concrete. However, the concrete strength and durability properties are affected differently by different types and dosages of the water reducing admixtures and superplasticizers. Based on the published literatures, this paper comprehensively reviews and analyzes this problem. Different types of the concretes, including ordinary Portland cement concrete, ordinary Portland cement concrete containing pozzolan, fly ash and ground granulated blast furnace slag, calcium sulfoaluminate cement concrete, ferrite aluminate cement concrete, recycled aggregates concrete, lightweight aggregate concrete, self-compacting concrete and ultra-high performance concrete, are considered to discuss the influence of types and dosages of the water reducing admixtures and superplasticizers on their strengths. Water absorption, frost resistance and permeability resistance of the concrete are mainly reviewed to discuss this influence on the durability properties of the concrete. Then, some suggestions on the application of the water reducing admixtures and superplasticizers in reinforced concrete structures and projects are proposed.

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Influence of Anti-Mud Agent on the Performance of Gangue Backfilling Paste

Zhou

Guo

Wang

et al. 2023

Lecture Notes in Civil Engineering

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Anti-mud agents could improve the efficiency of the action of water reducers in concrete by preferentially. The anti-mud agent was preferentially adsorbed on the clay surface, which reduces the ineffective adsorption of the water reducing agent to the paste, thereby improving the water reduction efficiency. However, its application in high-sediment content coal gangue gypsum backfill materials had not been reported. In this paper, The competitive adsorption mechanism echanism of anti-mud agent was first described. Tested its competitive adsorption with water reducer molecules on the surface of gangue powder. The influences of anti-mud agent on the slump, coagulation time and compressive strength of the paste at different ages were studied. The results showed that: as the dosage of anti-mud agent increased, the amount of desorption of the water reducer from the surface of gangue powder increased. When adding the same extra amount of water reducer, the slump of the backfill paste material increased with prolonged the coagulation time. The strength of the paste decreased at 3 d, and the strengths of 7 d and 28 d were not significantly deteriorated. A small amount of anti-mud agent could greatly improve the fluidity of the paste. This study provides a scientific basis for the pumping of pure solid waste paste.

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The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste

Cited by 7 publications

References 29 publications

Properties of Polycarboxylate Superplasticizers with Different Molecular Structure: A Comparative Study

Properties of Polycarboxylate Superplasticizers with Different Molecular Structure: A Comparative Study

Effect of Dose and Types of the Water Reducing Admixtures and Superplasticizers on Concrete Strength and Durability Behaviour: A Review

Influence of Anti-Mud Agent on the Performance of Gangue Backfilling Paste

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