Modified poly(carboxylate ether)-based superplasticizer for enhanced flowability of calcined clay-limestone-gypsum blended Portland cement

Akhlaghi, Omid; Aytaş, Tunahan; Tatli, Buse; Sezer, Dilek; Hodaei, Amin; Favier, Aurélie; Scrivener, Karen; Menceloǵlu, Yusuf́ Z.; Akbulut, Özge

doi:10.1016/j.cemconres.2017.08.028

Cited by 83 publications

(24 citation statements)

References 48 publications

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“…Fly ash and cement pastes were prepared with a solution to solid material ratio of 40:1 with 15 min magnetic stirring. Before each measurement, the suspensions were five times further diluted to adjust the electrical conductivity to lower than 18 mS/cm (Akhlaghi et al, 2017). To obtain good statistical reproducibility of the data, each suspension was tested four times with three runs per measurement.…”

Section: Zeta Potential Measurementmentioning

confidence: 99%

Effect of electrostatic repulsion induced by superplasticizers on the flow behaviour of fly ash pastes

Wang¹,

Kayali²,

Liow³

2019

Sustainable Construction Materials and Technologies (SCMT)

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Effect of superplasticizers on fly ash pastes was evaluated by consistency tests (for lower water content pastes) and mini-slump tests (for higher water content pastes). Results indicate that only the polycarboxylate superplasticizers (PCEs) largely improved the flowability of fly ash pastes. Zeta potential measurements were conducted to explain the influence of electrostatic repulsion on flow behaviours of pastes with different superplasticizers. In fly ash pastes, Lignosulfonates (LS) and Polynaphthalene superplasticisers (PNS) depressed the zeta potential to more negative values, while the PCEs increased the zeta potential to less negative values. The more negative zeta potential represents higher electrostatic repulsion between particles. However, the workability results revealed that PCEs had better dispersing ability than PNS and LS. It was deduced that the steric hindrance may be the dominating mechanism for the better dispersing noticed with fly ash pastes, while the electrostatic repulsion may have no impact on dispersing of these pastes.

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Section: Zeta Potential Measurementmentioning

confidence: 99%

Effect of electrostatic repulsion induced by superplasticizers on the flow behaviour of fly ash pastes

Wang¹,

Kayali²,

Liow³

2019

Sustainable Construction Materials and Technologies (SCMT)

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“…These composites have been already used as the adhesive layer, finishing materials or reinforced structures. Based on the previous researches, the chemical modification of the cement improves adhesion, flexural strength and crack resistance of the cement [3] .…”

Section: Introductionmentioning

confidence: 99%

The Effect of Cement Additives in PVC Materials

Ungai¹

2017

Int. J. Res. Granthaalayah

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The aim of the present paper is to show the effect of cement modifier behaviors in PVC materials. The PVC and the Portland cement are important materials in the industrial area. It can reach excellent properties if mixing the two materials with each other. The cement worked as filler in PVC, as shown the mechanical tests. The oxygen index was determined, accordingly the result show higher oxygen index value. That means the blend shows higher fire resistance comparing to neat PVC. The cement worked as a structural modifier, it caused modification in the blends structure and properties. From the mechanical tests, such as impact-, tensile-, flexural- and hardness tests the blend gives similar mechanical properties to neat PVC. The research presented in this paper shows that the cement mixed with PVC shows higher stability, fire resistance and similar mechanical properties as rigid PVC.

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“…13,14 In practice, COO À ions are usually introduced as the anionic groups in polycarboxylate superplasticizers. [15][16][17][18] Crosslinked superplasticizers are a new type of water reducing agent, 6,[19][20][21] which have attracted the attention of researchers and have been in increasing demand for industrial applications. These superplasticizers are usually obtained via the copolymerization of crosslinkers, anionic acrylates that act as monomers, and polyethers that provide long side-chains.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, superplasticizers are designed to have anionic groups in their structures so as to bond the cationic groups and then adsorb on the surfaces of cement particles, thus enhancing the dispersibility of the cement pastes 13,14 . In practice, COO − ions are usually introduced as the anionic groups in polycarboxylate superplasticizers 15–18 …”

Section: Introductionmentioning

confidence: 99%

Effects of crosslinked polycarboxylate superplasticizers with crosslinking agent containing ester and amide groups on the properties of cementitious systems

Lin

Pang

Wei

et al. 2021

J of Applied Polymer Sci

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Herein, crosslinked polycarboxylate superplasticizers were synthesized using acrylic acid, sodium methylallyl sulfonate and methyl polyethylene glycol acrylate as monomers, and monomers that contain either ester or amide groups as crosslinking agents. The superplasticizers that were synthesized from the ester-and amide-based crosslinking agents were respectively denoted as SP-E and SP-N. In addition, a series of performance characterizations were carried out to explore the influence of different functional groups in crosslinking agents on the performance of superplasticizers. Fluidity test results showed that the dispersibility and fluidity retention of cement pastes treated with the SP-E were better than those of cement pastes treated with SP-N. Meanwhile, the viscosity of the sample containing SP-E was lower than that containing SP-N. In addition, the amount of the two superplasticizers that had become adsorbed onto the surfaces of cement particles also differed, and in this case the adsorption capacity of SP-E was greater than that of SP-N. X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy tests showed that the ester-group based SP-E superplasticizers promoted cement hydration to a greater degree than that was achieved with their amide-bearing SP-N counterparts. This study would provide valuable insight for the development of crosslinked polycarboxylate superplasticizers.

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Modified poly(carboxylate ether)-based superplasticizer for enhanced flowability of calcined clay-limestone-gypsum blended Portland cement

Cited by 83 publications

References 48 publications

Effect of electrostatic repulsion induced by superplasticizers on the flow behaviour of fly ash pastes

Effect of electrostatic repulsion induced by superplasticizers on the flow behaviour of fly ash pastes

The Effect of Cement Additives in PVC Materials

Effects of crosslinked polycarboxylate superplasticizers with crosslinking agent containing ester and amide groups on the properties of cementitious systems

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