Free of Volatile Organic Compounds Protection against Moisture in Building Materials/Zabezpieczenia Przegród Budowlanych Przed Wilgocią Wolne Od Lotnych Związków Organicznych

Suchorab, Zbigniew; Barnat-Hunek, Danuta; Smarzewski, Piotr; Pavlík, Zbyšek; Černý, Robert

doi:10.2478/eces-2014-0029

Cited by 10 publications

(4 citation statements)

References 27 publications

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“…Methyl-silicon resin (R) increased the frost resistance by 77-84%, while alkyl-alkoxysiloxane (A) raised it by 66-80% in relation to the reference samples. The layer of polisiloxane resin protected the surface against the infiltration of water, and consequently, against the destructiveness of ice [3,[9][10][11].…”

Section: Resultsmentioning

confidence: 99%

“…However, waste polyurethane foam can be a reason for increased wettability of mortars, hence after they have been prepared, a surface hydrophobisation should be considered. The purpose of our further research [3,[9][10][11] was the evaluation of the possibility of applying hydrophobising preparations based on silica-organic compounds in the protection of lightweight mortars and concrete with construction waste, as well as water and wastewater management.…”

Section: Introductionmentioning

confidence: 99%

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Hydrophobisation of mortars containing waste polyurethane foam

et al. 2018

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This paper investigates the physical and mechanical properties of mortars modified with waste polyurethane foam (WPF) and the influence of hydrophobising agents on the physical characteristics. The sand was substituted with WPF (2-4 mm grain size) in the mortars which consisted of 5, 10 and 15% of foam, respectively. The contact angle of lightweight mortars was determined (θw) in the function of time, prior to and after the frost resistance test. The surface free energy characterizing the wettability and adhesion of mortars under normal conditions and following frost erosion was calculated with Neumann’s method based on the obtained data. The structure of mortars, adhesion of lightweight aggregate to cement paste and the structure of thin hydrophobic film were demonstrated by means of scanning electron microscopy. The mortars subjected to hydrophobisation process revealed a slight mass change caused by freezing and thawing processes: 0.1% for methyl silicone resin, 2.1% for alkyl-alkoxy-silane, and 9.2% for the samples which were not hydrophobized. On average, the contact angle of the standard mortars was 3 times lower than the one of hydrophobic material. The best results illustrating the efficiency of hydrophobisation were obtained for methyl silicone resin.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrophobisation of mortars containing waste polyurethane foam

et al. 2018

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“…Damage caused by moisture is a major factor in the degradation of building materials [22][23][24]. Water repellent treatment is one of the methods of protecting the surface of lightweight aggregate-concrete [25,26]. As a result of hydrophobisation, the absorption of capillary water decreases, which allows for proper water vapour permeability.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the contact angle and wettability of hydrophobised lightweight concrete with sawdust

Szafraniec

Barnat-Hunek

2020

Bud-Arch

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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 on the lightweight concrete modified with sawdust. The experimental part of the work concerns the physical and mechanical properties of lightweight concrete and the influence of two hydrophobic agents on the contact angle of the material. Lightweight concrete contact angle (θw) was determined as a time function using one measuring liquid. Water repellent coatings in lightweight concrete structure with the coarse aggregate sawdust (CASD) using electron microscopy were presented. The effectiveness of hydrophobisation of porous lightweight concretes was determined on the basis of the research. For the hydrophobic surface, the contact angle decreased and it depended on the used agents. The lowest contact angle of 40.2° (t=0) was obtained for reference concrete before hydrophobisation and 112.2° after hydrophobisation with a methyl-silicone resin based on organic solvent. The results of scientific research confirm the possibility to produce lightweight concretes modified with CASD with adequate surface protection against external moisture.

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“…One of the methods used to protect the lightweight aggregate-concrete surface is hydrophobisation [21,22]. It causes a decrease in capillary water absorption, thus allowing free vapour permeability.…”

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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Free of Volatile Organic Compounds Protection against Moisture in Building Materials/Zabezpieczenia Przegród Budowlanych Przed Wilgocią Wolne Od Lotnych Związków Organicznych

Cited by 10 publications

References 27 publications

Hydrophobisation of mortars containing waste polyurethane foam

Hydrophobisation of mortars containing waste polyurethane foam

Evaluation of the contact angle and wettability of hydrophobised lightweight concrete with sawdust

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

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