Effects of hydroxyethyl methyl cellulose ether on the hydration and compressive strength of calcium aluminate cement

Wang, Zhongping; Zhao, Yonghui; Zhou, Long; Xu, Linglin; Diao, Guizhi; Liu, Guanghua

doi:10.1007/s10973-019-08820-6

Cited by 27 publications

(14 citation statements)

References 34 publications

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“…Weaknesses. When studying cements with additions of cellulose ethers, their effect on hydration processes was mainly considered [14,16,20], while the viscosity factor of cellulose ethers has not yet been studied and was not taken into account when studying the effect of sulfate media on building mixtures.…”

Section: Swot Analysis Of Research Resultsmentioning

confidence: 99%

“…Among the main areas of problem solving, the authors of studies [19,20] considered the use of only one concentration of additives in determining its effect on physicomechanical and rheological characteristics. However, in [17], where the study of the effect of cellulose esters is aimed mainly at studying the effect of different types of cellulose esters, as in previous works, the effect of changes in concentration was not considered.…”

Section: Research Of Existing Solutions Of the Problemmentioning

confidence: 99%

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Effect of sulfate ion environment on physical and mechanical durability of cement products modified by cellulose ethers

Kovalenko¹,

Klymenko²,

Токарчук³

et al. 2020

TAPR

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Section: Swot Analysis Of Research Resultsmentioning

confidence: 99%

Section: Research Of Existing Solutions Of the Problemmentioning

confidence: 99%

Effect of sulfate ion environment on physical and mechanical durability of cement products modified by cellulose ethers

Kovalenko¹,

Klymenko²,

Токарчук³

et al. 2020

TAPR

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“…The hydration processes inhibition when introducing cellulose esters is noted when using other types of cement as matrices in dry construction mixes. The data from [15] indicate the slowing down of the hydration process of aluminate cement while the duration of setting increases with an increasing concentration of the ester.…”

Section: Literature Review and Problem Statementmentioning

confidence: 98%

The effect of methyl hydroxyethyl cellulose on the cement matrix properties

Kovalenko¹,

Токарчук²,

Poliuha³

2020

EEJET

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Вивчено вплив добавки метилгiдроксиетилцелюлози на технiчнi та фiзико-механiчнi властивостi цементної матрицi. Використовували ефiр целюлози низької (11000-16000 мПа•с), середньої (17000-23000 мПа•с) та високої (20000-30000 мПа•с) в'язкостi. Добавки вводилися в цемент в кiлькостi 0,25, 0,5 i 0,75 мас. %. Встановлено, що введення ефiру целюлози в цемент призводить до збiльшення нормальної густоти тiста i подовження строкiв тужавлення розчинiв. Нормальна густота цементного тiста зростає при введеннi ефiрiв целюлози низької (НВ) i середньої в'язкостi (СВ) на 5,4-16,8 %, а при введеннi ефiру високої в'язкостi (ВВ) на 21,3-41,4 %. Це пiдтверджує високу водоутримувальну здатнiсть метилгiдроксиетилцелюлози, яка зростає iз збiльшенням в'язкостi добавок. Строки тужавлення цементного тiста збiльшуються, в залежностi вiд концентрацiї та в'язкостi добавок, в 2-4 рази у порiвняннi з матерiалом без добавок. Вiдбувається також значне зниження мiцностi цементної матрицi в раннi строки тверднення (1-7 дiб) в залежностi вiд концентрацiї добавок в 2,2-4,2 рази. Найменше знижує мiцнiсть зразкiв ефiр целюлози низької в'язкостi, найбiльше-високої. Зменшення мiцностi вiдмiчається i у вiцi 28 дiб, але не таке вiдчутне. У порiвняннi з цементом без добавок, мiцнiсть складає: для ефiру низької в'язкостi при концентрацiях: 0

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“…For cellulose ethers, such behavior has been reported before from studies on CAC and Portland cement. 24,25 3.1.5. Dosage Dependence of the Accelerating Effect.…”

Section: Natural Biopolymers (Karaya and Konjac Gum)mentioning

confidence: 99%

Identification of Specific Structural Motifs in Biopolymers That Effectively Accelerate Calcium Alumina Cement

Engbert

Plank

2020

Ind. Eng. Chem. Res.

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Following a previous study where we presented on the surprising accelerating effect of alginates on calcium aluminate cement (CAC), we now systematically screened specific groups of biopolymers, hoping to identify other polysaccharides that also can accelerate CAC. Testing of pure, noncompounded alginates from different species/genera of algae revealed comparable strong acceleration, while chemical modification via esterification, decarboxylation, or sulfatation reduced the accelerating effect, thus highlighting the importance of high anionic charge and the presence of carboxylate groups as key structural features. Furthermore, biopolymers possessing a “cavity” that effectively can chelate and capture Ca2+, such as alginate, were found as another key structural unit; hence, pectin and ι- as well as κ-carrageenan were identified as biopolymers that possess a similar accelerating effect to alginate. Among other natural, synthetic, or semisynthetic biopolymers, karaya, gellan, and xanthan gum as well as agarose produced a slight accelerating effect, whereas konjac gum, hydroxypropyl guar, and methyl hydroxyethyl cellulose ether either perform neutral or retard CAC hydration. A preliminary mechanistic study revealed that effective accelerators reduce the concentration of free Ca2+ present in the cement pore solution and that a combination of high anionic charge, presence of a Ca2+ capturing cavity, and a high M w is required for a biopolymer to act as an accelerator in CAC. Our concept of using biopolymers such as alginate allows us to replace at least partially lithium salts (e.g., Li2CO3), which are currently applied to accelerate CAC but are much needed for the production of Li-ion batteries that are necessary for widespread electromobility.

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Effects of hydroxyethyl methyl cellulose ether on the hydration and compressive strength of calcium aluminate cement

Cited by 27 publications

References 34 publications

Effect of sulfate ion environment on physical and mechanical durability of cement products modified by cellulose ethers

Effect of sulfate ion environment on physical and mechanical durability of cement products modified by cellulose ethers

The effect of methyl hydroxyethyl cellulose on the cement matrix properties

Identification of Specific Structural Motifs in Biopolymers That Effectively Accelerate Calcium Alumina Cement

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