Effect of hydroxypropyl-methyl cellulose ether on rheology of cement paste plasticized by polycarboxylate superplasticizer

Ma, Baoguo; Peng, Yi; Tan, Hongbo; Jian, Shouwei; Zhi, Zhenzhen; Guo, Yulin; Qi, Huahui; Zhang, Ting; He, Xingyang

doi:10.1016/j.conbuildmat.2017.11.010

Cited by 131 publications

(31 citation statements)

References 36 publications

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“…Furthermore, the cement hydration delay was explained with the effect of HPMC on the precipitation of calcium hydroxide, the polymer's water absorption capacity [22][23][24], and the methyl content [25]. Moreover, a study have also reported the influence of molecular weight on the rheology of cement paste modified by HPMC admixture and its potential to combine via intermolecular and intramolecular crosslinks with Ca +2 ions [26]. This study also reports potential challenges using HPMC together with polycarboxylate superplasticizers as HPMC molecules have the potential to adsorb superplasticizer molecules.…”

Section: Introductionmentioning

confidence: 99%

Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Figueiredo

Çopuroğlu

Schlangen

2019

Construction and Building Materials

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Section: Introductionmentioning

confidence: 99%

Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Figueiredo

Çopuroğlu

Schlangen

2019

Construction and Building Materials

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“…Nanoclay enhances or modifies [24] thixotropy behavior of cement pastes with polycarboxylate ether superplasticizer [67]. Hydroxypropyl-methyl cellulose ether [68] and polyacrylic acid [69] acts opposite to the dispersive capability of polycarboxylate type superplasticizers. The presence of other mineral additions, as borax, in order to retard cement paste setting must be analyzed in depth due to the negative effect that can induce in the adsorption of superplasticizer molecules onto the particle surface [70].…”

Section: Chemical Admixtures Influencementioning

confidence: 99%

Rheological Behavior of Fresh Cement Pastes

Rubio-Hernández

2018

Fluids

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Rheology of a concrete is mainly controlled by the rheological behavior of its cement paste. This is the main practical reason for the extensive research activity observed during 70 years in this research subfield. In this brief review, some areas of the research on the rheological behavior of fresh cement pastes (mixture method influence, microstructure analysis, mineral additions influence, chemical additives influence, blended cements behavior, viscoelastic behavior, flow models, and flow behavior analysis with alternative methods) are examined.

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“…No bleeding and segregation is mandatory in high fluidity cement-based materials, such as self-compacting concrete, self-leveling floor, and grout materials. Generally, this can be obtained with addition of viscosity-enhancing agent (VEA) and superplasticizer [ 1 , 2 , 3 ]. Polyacrylic acid (PAA) is one of the most commonly used viscosity-enhancing agents with an excellent effect on resisting bleeding and segregation [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyacrylic Acid on Rheology of Cement Paste Plasticized by Polycarboxylate Superplasticizer

Peng

Tan

et al. 2018

Materials

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Viscosity-enhancing agents (VEA) have been widely employed in high flowability cement-based materials, so as to ensure that no bleeding and segregation would occur. However, in most cases, interaction between VEA and superplasticizer would be unavoidable. In this study, the effect of polyacrylic acid (PAA), known as one of the most commonly used VEAs, on rheology performance of cement paste containing polycarboxylate superplasticizer (PCE), was studied. The initial fluidity was assessed with mini slump, and rheological behavior of cement paste was evaluated with rotor rheometer. Adsorption amount was examined with total organic carbon (TOC) analyzer, and the zeta potential was also tested. The interaction between PAA and PCE in the presence of calcium ion (Ca2+) was analyzed with conductivity, X-ray photoelectron spectroscope (XPS), and dynamic light scattering (DLS). The results illustrate that PAA can adsorb onto the surface of cement particles to plasticize cement paste, being similar to PCE. In the presence of Ca2+, PAA can be curled and crosslinked, as a result of the combination between carboxyl groups (COO−) and Ca2+, thereby affecting the adsorption performance and conformation behavior. It is interesting that negative impact of PAA on dispersion efficiency of PCE can be demonstrated; one reason is the reduced adsorption amount of PCE by PAA competitively adsorbing onto the cement surface, and another possible reason is the invalided PCE by adsorption of PAA. Additionally, molecular weight of PAA should be considered if being used as VEA in PCE system.

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Effect of hydroxypropyl-methyl cellulose ether on rheology of cement paste plasticized by polycarboxylate superplasticizer

Cited by 131 publications

References 36 publications

Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Effect of viscosity modifier admixture on Portland cement paste hydration and microstructure

Rheological Behavior of Fresh Cement Pastes

Effect of Polyacrylic Acid on Rheology of Cement Paste Plasticized by Polycarboxylate Superplasticizer

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