Evaluation of the contact angle of hydrophobised lightweight-aggregate concrete with sewage sludge

• Autorzy: Barnat-Hunek D. , Smarzewski P. , Łagód G. , Suchorab Z.

Identyfikatory

DOI

10.1515/eces-2015-0037

Warianty tytułu

PL

Ocena kąta zwilżania hydrofobizowanego keramzytobetonu z osadem ściekowym

• Języki publikacji: EN

Abstrakty

EN

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.

PL

Celem badań przedstawionych w pracy była ocena efektu zastosowania preparatów hydrofobowych opartych o substancje krzemoorganiczne do zabezpieczania lekkich bloczków keramzytowych z dodatkiem osadów ściekowych przed wilgocią. W artykule omówiono zagadnienia związane ze zwilżalnością warstwy wierzchniej hydrofobizowanego keramzytobetonu modyfikowanego osadem ściekowym. Część doświadczalna pracy dotyczy cech fizycznych i mechanicznych keramzytobetonu oraz wpływu dwóch preparatów hydrofobowych na kąt zwilżania materiału. Wyznaczono kąt zwilżania betonu lekkiego (θw) w funkcji czasu przy użyciu jednej cieczy pomiarowej. Przedstawiono powłoki hydrofobowe w strukturze betonu lekkiego z osadem przy użyciu mikroskopii elektronowej. Na podstawie badań określono skuteczność hydrofobizacji porowatych betonów lekkich. Dla użytych substancji hydrofobizujących kąty zwilżania zmniejszały się z upływem czasu, a zmiana zależała od zastosowanych preparatów. Wyniki przeprowadzonych badań potwierdziły możliwość poprawy parametrów betonów lekkich wraz z odpowiednim zabezpieczeniem powierzchniowym przed wilgocią z zewnątrz.

Słowa kluczowe

EN

lightweight aggregate concrete; sewage sludge; hydrophobisation; contact angle; microstructure

PL

osady ściekowe; keramzytobeton; hydrofobizacja; kąt zwilżania; mikrostruktura

• Wydawca: Towarzystwo Chemii i Inżynierii Ekologicznej
• Czasopismo: Ecological Chemistry and Engineering. S
• Rocznik: 2015
• Tom: Vol. 22, nr 4
• Strony: 625--635
• Opis fizyczny: Bibliogr. 47 poz., wykr., rys., tab., fot.

Twórcy

autor

Barnat-Hunek D.

• Department of Building Construction, Faculty of Civil Engineering and Architecture, Lublin University of Technology, ul. Nadbystrzycka 40, 20-618 Lublin, Poland

autor

Smarzewski P.

• Department of Civil Engineering, Faculty of Civil Engineering and Architecture, Lublin University of Technology, ul. Nadbystrzycka 40, 20-618 Lublin, Poland

autor

Łagód G.

• Department of Water Supply and Wastewater Disposal, Faculty of Environmental Engineering, Lublin University of Technology, ul. Nadbystrzycka 40a, 20-618 Lublin, Poland

autor

Suchorab Z.

• Department of Water Supply and Wastewater Disposal, Faculty of Environmental Engineering, Lublin University of Technology, ul. Nadbystrzycka 40a, 20-618 Lublin, Poland

Bibliografia

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