Hydrophobic lime based mortars with linseed oil: Characterization and durability assessment

Nunes, Cristiana; Slížková, Zuzana

doi:10.1016/j.cemconres.2014.03.011

Cited by 67 publications

(37 citation statements)

References 25 publications

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“…Finally, at temperature around 500°C, the Ca(OH) 2 decomposition takes place. In Portland cement samples with 0.1% of Zn(II), Mellado et al indicated the presence of two peaks in DTG at 180 and between 270°C and 290°C corresponding to the decomposition of hydrated calcium hydroxyzincate CaZn 2 (OH) 6 ·2H 2 O and hydrozincite Zn 5 (CO 3 ) 2 (OH) 6 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…e DTG of hydrated calcium hydroxyzincate (CaZn 2 (OH) 6 ·2H 2 O) synthesized (Mellado et al [54]) shows three peaks, the first two overlapped in a temperature range between 140°C and 220°C corresponding to the two first stages' decomposition of CaZn 2 (OH) 6 ·2H 2 O. At the lowest temperature, the dehydration of CaZn 2 (OH) 6 ·2H 2 O takes place, and between 160°C and 220°C in the DTG, a wide peak appears corresponding to the decomposition of CaZn 2 (OH) 6 in ZnO and Ca(OH) 2 . Finally, at temperature around 500°C, the Ca(OH) 2 decomposition takes place.…”

Section: Resultsmentioning

confidence: 99%

“…e incorporation of additions to modify and improve its fresh properties and its physical, mechanical, and durability properties, as well as to obtain new functional properties such as photocatalysis [1,2], antibacterial effects (Sikora et al [3,4]), hydrophobicity (Tittarelli [5] and Nunes and Slizkova [6]), and fungicide effects (De Muynck et al [7]) among others is currently an important research topic. In recent years, nanotechnology applied to cement-based materials has been growing since the use of additions of nanometric size significantly increases the effects on their mechanical and functional properties, and the combination of several additions might be very promising (Sikora et al [4], León et al [8], and Mohseni et al [9]).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Viability Study of a Safe Method for Health to Prepare Cement Pastes with Simultaneous Nanometric Functional Additions

Rubia

Lucas-Gil

Reyes

et al. 2018

Advances in Materials Science and Engineering

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e use of a mixing method based on a novel dry dispersion procedure that enables a proper mixing of simultaneous nanometric functional additions while avoiding the health risks derived from the exposure to nanoparticles is reported and compared with a common manual mixing in this work. Such a dry dispersion method allows a greater workability by avoiding problems associated with the dispersion of the particles. e two mixing methods have been used to prepare Portland cement CEM I 52.5R pastes with additions of nano-ZnO with bactericide properties and micro-or nanopozzolanic SiO 2 . e hydration process performed by both mixing methods is compared in order to determine the efficiency of using the method. e hydration analysis of these cement pastes is carried out at different ages (from one to twenty-eight days) by means of differential thermal analysis and thermogravimetry (DTA-TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) analyses. Regardless of composition, all the mixtures of cement pastes obtained by the novel dispersion method showed a higher retardation of cement hydration at intermediate ages which did not occur at higher ages. In agreement with the resulting hydration behaviour, the use of this new dispersion method makes it possible to prepare homogeneous cement pastes with simultaneous functional nanoparticles which are physically supported on the larger particles of cement, avoiding exposure to the nanoparticles and therefore minimizing health risks. Manual mixing of cement-based materials with simultaneous nanometric functional nanoparticles on a large scale would make it difficult to obtain a homogenous material together with the health risks derived from the handling of nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Viability Study of a Safe Method for Health to Prepare Cement Pastes with Simultaneous Nanometric Functional Additions

Rubia

Lucas-Gil

Reyes

et al. 2018

Advances in Materials Science and Engineering

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“…Malinowski (19) studied the Caesarea Roman aqueduct and states that some type of oil was added as recommended by Vitruvius. A recent study enabled the detection of linseed oil in the mortar beneath the mosaics of the vaults of Saint Peter's Basilica that was also cited in ancient recipes related to the construction of the basilica (20).The fatty acids derivatives as a hydrophonic agents change the surface tension in pores and cracks, which limits water permeation (18,21,22). The chemical structure and properties of fatty acids make them suitable for addition to concrete.…”

Section: Introductionmentioning

confidence: 99%

The fatty acids based organofunctional silane protective coatings for concrete

Szubert

2021

materconstrucc

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The possibility of using free fatty acids for the synthesis of new organofunctional silanes is shown. In nature, fatty acids occur in the form of esters with glycerin (fats) and are widely used for production of soap, oil paints, medicines and cosmetics. Of particular interest in this study was the application of organosilicon derivatives of oleic acid for production of coating that would cover the surface of concrete and protect it from water permeation. As a result of proposed silanization, the concrete surface acquired hydrophobic character with the wetting angles up to 115°, and the concrete absorbability was reduced by up to 93%.

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“…Current research is trying to improve the durability of masonry mortars with various additives e.g. metakaolin, bentonite, linseed oil [10] [11].…”

mentioning

confidence: 99%

Experimental Investigation of Bed Joint Reinforcement Corrosion in Masonry Mortars

Stathatos¹,

Zacharopoulou²,

Batis³

et al. 2016

OJMetal

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The paper investigates the behaviour against corrosion offered by seven masonry mortar compositions to the reinforcement placed in masonry bed joints. Durability protection was evaluated on the basis of four criteria: carbonation area of the specimens, mass loss of steel, electrochemical potential and presence of chloride ions. Tests were performed against two corrosive environments, with and without chloride ions, and were carried out for three periods: three, six and thirty three months. Two types of steel were used, plain steel and galvanized steel. Moreover, the steel protective action of a corrosion inhibitor, sodium nitrite, was examined. A qualitative comparison approach against prototype concrete-like mortars was used. The results showed that the selected masonry mortars did not exhibit similar properties against corrosion to those of concrete and that the addition of sodium nitrite decrease of the corrosion rate only 5%-20% did not meaningfully improve durability properties. Nevertheless, the addition of lime in small quantities did not have a negative impact on the mortars' durability characteristics, e.g. the same average corrosion rate.

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Hydrophobic lime based mortars with linseed oil: Characterization and durability assessment

Cited by 67 publications

References 25 publications

Viability Study of a Safe Method for Health to Prepare Cement Pastes with Simultaneous Nanometric Functional Additions

Viability Study of a Safe Method for Health to Prepare Cement Pastes with Simultaneous Nanometric Functional Additions

The fatty acids based organofunctional silane protective coatings for concrete

Experimental Investigation of Bed Joint Reinforcement Corrosion in Masonry Mortars

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