Influence of polymers on microstructure and adhesive strength of cementitious tile adhesive mortars

Jenni, Andreas; Holzer, Lorenz; Zurbriggen, R.; Herwegh, Marco

doi:10.1016/j.cemconres.2004.06.039

Cited by 211 publications

(120 citation statements)

References 13 publications

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“…However, according to several authors, polysaccharides lead to an increase in the entrained air amount [15,17], highlighted by a rise in the total porosity from 15 to 50% and a drop of the mortar density [35,[52][53][54], to steric hindrance induced by their adsorption on cement grains [16] and repulsive depletion forces induced by polymers dissolved in pore solution [16]. All these factors tend to decrease impact of Van der Waals attractive forces and thus yield stress.…”

Section: Yield Stressmentioning

confidence: 99%

Influence of hydroxypropylguars on rheological behavior of cement-based mortars

Poinot

Govin

Grosseau

2014

Cement and Concrete Research

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To cite this version:Thomas Poinot, Alexandre Govin, Philippe Grosseau. Influence of hydroxypropylguars on rheological behavior of cement-based mortars. Cement and Concrete Research, Elsevier, 2014, 58, pp.161-168 properties was thus investigated thanks to a suitable measurement procedure. HPG allows keeping a positive yield stress value while the yield stress of hydroxypropyl methyl cellulose (HPMC) mortars was found to decrease with an increase in dosage. HPG increases the shearthinning behavior and the consistency of mortars. The study of pore solution viscositysuggests that the entanglement of HPG coils beyond a threshold dosage is crucial to understand the rheological macroscopic behavior of HPG-admixed mortars. Nevertheless, the increase in mortar viscosity induced by HPG was lower than expected which reveals additional and specific repulsive forces induced by polysaccharides.

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Section: Yield Stressmentioning

confidence: 99%

Influence of hydroxypropylguars on rheological behavior of cement-based mortars

Poinot

Govin

Grosseau

2014

Cement and Concrete Research

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“…[3] Only limited knowledge exists on the transport of polymers toward the drying surface and skin formation during drying. Jenni et al [9] investigated the skin formation of cellulose ether (CE) and polyvinyl alcoholmodified mortar during open time and considered that skin formation is a key factor that determines adhesion. The authors showed that both organic and inorganic substances can transport toward the drying surface along with the water flux.…”

Section: Introductionmentioning

confidence: 99%

“…During drying, concentration of reactive cement particles at the top surface of mortar may occur, where their rapid hydration could contribute to the reduction of open time by reducing the free water content and stiffening of the paste. [9] Also carbonation can generate a skin, typically consisting of a 10-µm-thick layer of CaCO 3 formed during the first 30 min of air exposure.…”

Section: Introductionmentioning

confidence: 99%

Transport of a water-soluble polymer during drying of a model porous media

et al. 2017

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This article presents an experimental investigation on transport of methylhydroxyethylcellulose (MHEC) during drying of a model porous material. Nuclear magnetic resonance imaging and thermogravimetric analysis are used to measure water and MHEC transport, respectively. MHEC is added to glue mortars to increase open time, i.e., the time period during which tiles can be applied with sufficiently good adhesion. Previous work showed that MHEC promotes a receding front during drying and therefore leads to differences in the degree of hydration throughout the mortar sample, i.e., the top surface shows poor hydration and the bottom surface shows good hydration. In this study, we investigate the transport of MHEC during drying of a model porous material, consisting of packed glass beads saturated with an aqueous MHEC solution. At MHEC concentration less than 1.3 wt%, homogeneous drying is observed, enabling advective transport of MHEC toward the drying surface. In this case, accumulation of MHEC may form a skin at the top surface and below this skin layer, a gel zone may form, which allows migration of water toward the evaporation surface. When the MHEC concentration is above 1.3 wt%, front receding drying is observed, which prevents transport of MHEC, resulting in a more homogeneous distribution of MHEC. ARTICLE HISTORY

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“…The emulsified RPW will form during wet mixing (with during this time RPW will act like polymer latex). The advantages of using RPW are seen in improving the tensile strength of hardened mortar, and providing flexibility to the inside components [14]. Different types of polymer will give different characteristics.…”

Section: Hardened State Of Polymer Modified Cement: Mechanical Strenmentioning

confidence: 99%

“…Three major observations were made based on; (i) the mobility of pore water and polymers, (ii) volumetric changes, and (iii) reinitiated hydration of the cement. Through their research, three mechanisms that affect the composite are cement hydration, mortar volume change and reversible swelling of the latex films [14][15].…”

Section: Fresh State Of Polymer Modified Cementmentioning

confidence: 99%

Fresh and Hardened State of Polymer Modified Concrete and Mortars – A Review

et al. 2017

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Abstract. Polymer modified concrete or mortar is an alternative to the advancement of long serving civil engineering material -mortar and concrete. The excellence and promising benefits of modified composites have led to numerous progressive studies of its application. This paper presented a critical review from previous research on the polymer modified concrete and mortar. Both fresh and hardened state behaviours were reviewed as they are important for the development of excellent engineering material. Most of the applications of polymer modified concrete and mortar can be seen in diverse types of polymer such as latex, epoxy and emulsion. The utilization of each type of polymers resulted in different characteristics of composite concrete or mortar. Such applications have contributed to the improvement in terms of workability and mechanical strength, especially at higher grade of composite strength of concrete material.

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Influence of polymers on microstructure and adhesive strength of cementitious tile adhesive mortars

Cited by 211 publications

References 13 publications

Influence of hydroxypropylguars on rheological behavior of cement-based mortars

Influence of hydroxypropylguars on rheological behavior of cement-based mortars

Transport of a water-soluble polymer during drying of a model porous media

Fresh and Hardened State of Polymer Modified Concrete and Mortars – A Review

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