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

Szafraniec, Małgorzata; Barnat-Hunek, Danuta

doi:10.35784/bud-arch.1644

Artykuł - szczegóły

Tytuł artykułu

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

Autorzy

Szafraniec Małgorzata , Barnat-Hunek Danuta

Treść / Zawartość

Pełne teksty:

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Identyfikatory

DOI

10.35784/bud-arch.1644

Warianty tytułu

Ocena kąta zwilżania i zwilżalności hydrofobizowanego betonu lekkiego z trocinami

Języki publikacji

Abstrakty

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.

Celem badań przedstawionych w pracy była ocena możliwości zastosowania preparatów hydrofobowych na bazie związków krzemoorganicznych do zabezpieczania betonu lekkiego modyfikowanego trocinami. Część doświadczalna pracy dotyczy właściwości fizycznych i mechanicznych betonu lekkiego oraz wpływu dwóch preparatów hydrofobowych na kąt zwilżania materiału. Określono kąt zwilżania betonu lekkiego (θw) w funkcji czasu za pomocą jednej cieczy pomiarowej. Za pomocą mikroskopu elektronowego pokazano powłoki hydrofobowe w strukturze betonu lekkiego, w którym zastosowano trociny jako kruszywo grube (CASD). Na podstawie badań określono skuteczność hydrofobizacji porowatych betonów lekkich. Dla powierzchni hydrofobowej zmniejszył się kąt zwilżania i był on zależny od zastosowanych środków. Najniższy kąt zwilżania 40,2° (t=0) uzyskano dla betonu wzorcowego przed hydrofobizacją i 112,2° po hydrofobizacji żywicą metylo-silikonową na bazie rozpuszczalnika organicznego. Wyniki badań naukowych potwierdzają możliwość otrzymywania betonów lekkich modyfikowanych za pomocą CASD z odpowiednią ochroną powierzchni przed działaniem wilgoci z zewnątrz.

Słowa kluczowe

sawdust lightweight aggregate concrete organosilicon compounds hydrophobisation contact angle

trociny beton z kruszywem lekkim związki krzemoorganiczne hydrofobizacja kąt zwilżania

Wydawca

Wydawnictwo Politechniki Lubelskiej

Czasopismo

Budownictwo i Architektura

Rocznik

2020

Tom

Vol. 19, no 2

Strony

19--32

Opis fizyczny

Bibliogr. 68 poz., fig., tab.

Twórcy

autor

Szafraniec Małgorzata

m.szafraniec@pollub.pl

Faculty of Civil Engineering and Architecture, Lublin University of Technology Poland

autor

Barnat-Hunek Danuta

Department of Construction; Faculty of Civil Engineering and Architecture; Lublin University of Technology; Nadbystrzycka 40, 20-618 Lublin, Poland; Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).

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Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-e7253dcb-cc01-4340-8809-559ef7f1a98a