Innovative Materials Made by Adding Cellulose Ethers to Cement Mortars

Jumate, Elena; Manea, Daniela Lucia; Aciu, Claudiu; Molnar, Luminița Monica; Fechete, Radu

doi:10.1016/j.protcy.2015.02.042

Cited by 13 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Também foram relacionados quantos trabalhos, dos 98 analisados (exceto [99,100,104,111]), encontraram valores de aderência, considerando todas variações propostas, abaixo das recomendações. Apenas 10 [12,22,27,31,33,76,85,94,95,112] dos 98 estudos (10%) obtiveram valores que atendem, com todas as argamassas testadas, o maior limite normativo para aderência à tração (0,60 MPa). Esta informação, aliada ao que foi exposto em [63,110] com dados de diversas obras que sequer alcançaram 0,20 MPa de média em aderência, comprova e alerta para o fato de que o estudo desta propriedade deve ser sempre levado em consideração, visto que negligenciar o controle de suas variáveis intervenientes pode trazer um grande risco à integridade das construções e até mesmo à segurança dos usuários destas.…”

Section: Resultsunclassified

Resistência de aderência de revestimentos de argamassa - contribuição por meio de mapeamento e revisão sistemática de literatura para futuras pesquisas no tema

Vaz

Carasek

2019

Cerâmica

View full text Add to dashboard Cite

Resumo A resistência de aderência é uma das principais propriedades dos revestimentos de argamassa e é bastante estudada pelo meio científico. Essa propriedade tem uma gama de intervenientes que são normalmente tratados de maneira isolada nos trabalhos científicos. O presente trabalho visou contribuir com o domínio e relações da propriedade resistência de aderência, compilando e classificando trabalhos da literatura pelas variáveis utilizadas em seus estudos, servindo como embasamento para nortear futuras pesquisas. Para tanto, foi realizada uma revisão sistemática da literatura reunindo análises e comparações entre estudos (artigos) nacionais e internacionais que abordaram essa propriedade e seus fatores intervenientes. Um resultado interessante foi a compilação das performances dos aditivos e adições, em termos de variações médias, na resistência de aderência bem como correlações matemáticas com outras propriedades dos revestimentos.

show abstract

Section: Resultsunclassified

Resistência de aderência de revestimentos de argamassa - contribuição por meio de mapeamento e revisão sistemática de literatura para futuras pesquisas no tema

Vaz

Carasek

2019

Cerâmica

View full text Add to dashboard Cite

show abstract

“…Ich wpływ na właściwości mechaniczne, mikrostrukturę, czy proces wiązania, pomimo powszechnego stosowania, nie został jednak jednoznacznie przedstawiony w literaturze. W wielu publikacjach można znaleźć sprzeczne informacje na ten temat (5)(6)(7)(8).…”

Section: Discussionunclassified

“…Despite being widely used, their impact on mechanical properties, microstructure, or the setting process has not been clearly described in the literature. Controversial data on this topic can be found in many publications (5)(6)(7)(8). This may result from a wide variety of admixtures of various properties, the ways of etherifi cation as well as from trade secrets of companies that are engaged in the production and sale of both cellulose ethers and mortars.…”

Section: Discussionmentioning

confidence: 99%

The rheology of cement pastes with addition of hydrated lime and cellulose ether in comparison with selected properties of plastering mortars

Spychał

2020

Cem Wapno Beton

View full text Add to dashboard Cite

The article presents the results of the investigation on pastes and cement mortars modified with lime and cellulose ether. Rheological measurements of pastes included yield stress and plastic viscosity. For mortars, bulk density, air content, shrinkage and water retention value were determined. Setting and hardening process was tested by the ultrasonic method, completed with a compressive strength test. The test results confirmed the beneficial effect of hydrated lime and cellulose ether addition on the properties of fresh plaster. The addition of cellulose ether increased the water retention coefficient by at least 10% compared to mortars without cellulose ether. The effect of cellulose ether on water retention in mortar was more significant than that of hydrated lime. Both cellulose ether and/or hydrated lime causes setting retardation as well as decrease the rate of hardening. Compressive strength is decreased while shrinkage deformation is reduced.

show abstract

“…Hydroxyethyl methyl cellulose (HEMC) is a kind of commonly used cellulose ether (CE) in construction. It has been confirmed that HEMC has effects on the workability [ 6 ], rheological properties [ 7 ], mechanical properties [ 8 ], hydration [ 9 ] and pore structure [ 10 ] of Portland cement mortar. The mechanical properties [ 11 ], early hydration [ 12 ] and the existence state of water [ 13 ] in CSA cement mortar can be also influenced by methylcellulose (MC) and HEMC.…”

Section: Introductionmentioning

confidence: 99%

Properties of Calcium Sulfoaluminate Cement Mortar Modified by Hydroxyethyl Methyl Celluloses with Different Degrees of Substitution

Zhang

Wang

et al. 2021

Molecules

View full text Add to dashboard Cite

This paper studies the influence of hydroxyethyl methyl cellulose (HEMC) on the properties of calcium sulfoaluminate (CSA) cement mortar. In order to explore the applicability of different HEMCs in CSA cement mortars, HEMCs with higher and lower molar substitution (MS)/degree of substitution (DS) and polyacrylamide (PAAm) modification were used. At the same time, two kinds of CSA cements with different contents of ye’elimite were selected. Properties of cement mortar in fresh and hardened states were investigated, including the fluidity, consistency and water-retention rate of fresh mortar and the compressive strength, flexural strength, tensile bond strength and dry shrinkage rate of hardened mortar. The porosity and pore size distribution were also analyzed by mercury intrusion porosimetry (MIP). Results show that HEMCs improve the fresh state properties and tensile bond strength of both types of CSA cement mortars. However, the compressive strength of CSA cement mortars is greatly decreased by the addition of HEMCs, and the flexural strength is decreased slightly. The MIP measurement shows that HEMCs increase the amount of micron-level pores and the porosity. The HEMCs with different MS/DS have different effects on the improvement of tensile bond strength in different CSA cement mortars. PAAm modification can improve the tensile bond strength of HEMC-modified CSA cement mortar.

show abstract

Innovative Materials Made by Adding Cellulose Ethers to Cement Mortars

Cited by 13 publications

References 11 publications

Resistência de aderência de revestimentos de argamassa - contribuição por meio de mapeamento e revisão sistemática de literatura para futuras pesquisas no tema

Resistência de aderência de revestimentos de argamassa - contribuição por meio de mapeamento e revisão sistemática de literatura para futuras pesquisas no tema

The rheology of cement pastes with addition of hydrated lime and cellulose ether in comparison with selected properties of plastering mortars

Properties of Calcium Sulfoaluminate Cement Mortar Modified by Hydroxyethyl Methyl Celluloses with Different Degrees of Substitution

Contact Info

Product

Resources

About