Effect of hydrophobization treatment on the hydration of repair Roman cement mortars

Klisińska‐Kopacz, Anna; Tišlova, Renata

doi:10.1016/j.conbuildmat.2012.05.002

Cited by 25 publications

(13 citation statements)

References 16 publications

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“…The dosage of admixtures was chosen considering previous literature [23,24]. A reference paste series contained no water repellent.…”

Section: Preparation Of Cement Pastes For Investigation Of Their Hydrmentioning

confidence: 99%

“…Many research studies have dealt with the development of strategies to enhance the durability of cement mortars and plasters towards the resistance to the action of water, salt attack and frost attack, by reducing the water uptake through the use of water-repellent systems. Different water-repellent solutions have been investigated: i) aqueous or solvent-based water repellent systems used for impregnation treatments [15][16][17], and ii) water-repellent admixtures added directly to the mortars' formulation [18][19][20][21][22][23][24]. In the latter case, different hydrophobic compounds (as dry powder or liquid) can be selected and mixed into fresh mortar mixtures.…”

Section: Introductionmentioning

confidence: 99%

“…However, water-repellent admixtures not only reduce the water uptake of the mortar system, but they affect also the fresh and hardened mortar properties, as well as the hydration of the binder [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of water-repellent admixtures on the behaviour and the effectiveness of Portland limestone cement mortars

Falchi

Zendri

Müller³

et al. 2015

Cement and Concrete Composites

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“…The dosage of admixtures was chosen considering previous literature [23,24]. A reference paste series contained no water repellent.…”

Section: Preparation Of Cement Pastes For Investigation Of Their Hydrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The influence of water-repellent admixtures on the behaviour and the effectiveness of Portland limestone cement mortars

Falchi

Zendri

Müller³

et al. 2015

Cement and Concrete Composites

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“…This is because the by-products of the use of soaps are water-soluble salts that lead to increased hygroscopicity of the material [22]. In addition, it is not recommended to use soaps for the hydrophobising of building surfaces due to its low resistance to dirt, mechanical damage and salinity [23,24]. Another unfavorable factor includes interference with the cement hydration process in the presence of a hydrophobic compound that decreases the compressive strength of materials.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Calcium Carbonate for Cement Surface

et al. 2017

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This report describes a novel way to generate a highly effective hydrophobic cement surface via a carbonation route using sodium stearate. Carbonation reaction was carried out at different temperatures to investigate the hydrophobicity and morphology of the calcium carbonate formed with this process. With increasing temperatures, the particles changed from irregular shapes to more uniform rod-like structures and then aggregated to form a plate-like formation. The contact angle against water was found to increase with increasing temperature; after 90 • C there was no further increase. The maximum contact angle of 129 • was obtained at the temperature of 60 • C. It was also found that carbonation increased the micro hardness of the cement material. The micro hardness was found to be dependent on the morphology of the CaCO 3 particles. The rod like structures which caused increased mineral filler produced a material with enhanced strength. The 13 C cross polarization magic-angle spinning NMR spectra gave plausible explanation of the interaction of organic-inorganic moieties.

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“…There are literature reports on the application of silanes for modification of the material surface [26,27] or in concrete [28] or mortar [29][30][31] mixes. These compounds ensure hydrophobicity of concrete surfaces against water and repellence of corrosive compounds, eg water-soluble salts [32].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Contact Angle of Hydrophobised Lightweight-Aggregate Concrete with Sewage Sludge

Barnat-Hunek

Smarzewski

Łagód

et al. 2015

Ecological Chemistry and Engineering S

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Abstract:The aim of the research presented in the paper was to evaluate the feasibility of using hydrophobic preparations based on organosilicon compounds for protection treatment of lightweight aggregates modified with municipal sewage sludge. Issues related to the wettability of the surface layer of hydrophobised lightweight-aggregate concrete supplemented with sewage sludge are discussed in the paper. The experimental part of the study is focused on the physical and mechanical characteristics of lightweight-aggregate concrete and the effect of two hydrophobic preparations on the contact angle of the material. The contact angle for lightweight concrete (θw) was determined as a function of time using one measurement liquid. The hydrophobic coatings in the structure of lightweight concrete modified with sewage sludge were shown using electron microscopy. The investigations demonstrated the effectiveness of hydrophobisation of porous lightweight concretes. On the hydrophobic surfaces, the contact angles decreased with time and depended on the preparations used. The results of the research confirm the possibility to produce lightweight aggregate-concretes modified with sewage sludge with appropriate surface protection against external moisture.

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Effect of hydrophobization treatment on the hydration of repair Roman cement mortars

Cited by 25 publications

References 16 publications

The influence of water-repellent admixtures on the behaviour and the effectiveness of Portland limestone cement mortars

The influence of water-repellent admixtures on the behaviour and the effectiveness of Portland limestone cement mortars

Hydrophobic Calcium Carbonate for Cement Surface

Evaluation of the Contact Angle of Hydrophobised Lightweight-Aggregate Concrete with Sewage Sludge

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