Physical and technical properties of porous non-metallic materials saturated with silicone compounds.
Journal Title: Міжнародний науково-практичний журнал Товари і Ринки - Year 2016, Vol 2, Issue 22
Abstract
Background. As porous nonmetallic materials (limestone, coquina, tuff, sandstone) are used at all stages of the buildings construction (for walls masonry and interior decoration), they should have high physical and technical properties. It is important to find out ways to improve their physical and technical characteristics. The most cost-effective method is the impregnation of porous materials with chemical compounds of different classes. Special attention is given to study of physical and technical properties of natural porous materials after impregnating with silicon compounds that are non-toxic and safe. The aim of research is to study physical and technical properties of porous nonmetallic materials impregnated with silicon compounds. Material and methods. Samples of porous nonmetallic materials (limestone, coquina, tuff, sandstone) the most common in the commodity market of Ukraine were selected as the object of study. Compressive strength was determined using a hydraulic press according to the change of the breaking load. Flexural strength was determined on samples freely placed on two support beams, where the load was applied to the middle of the sample. Water and porosity parameters were determined by the kinetics of capillary leakage. The method of determining of wetting and rolling contact angles by means of microscope with refracting prism was used. Results. Research of physical and technical properties of porous non-metallic materials showed the preference use for treatment of stone with silicon compounds, such as siliconates of alkal metals and hydrolyzat ethylsilicate. Some ambiguity of the influence of different compounds on some physical and technical parameters can be traced in the presence of the relationship between them in the scheme of "structure – impregnating composition – physical and technical properties." This is due to various chemical and mineralogical composition of the materials, the level of closed and open porosity and degree of impregnating of silicon compounds and interactions between investigated substrates. Minimum relative change of solidity was indentifed for the impregnated tuff characterized by the most open porosity of the material. Repellent surface properties of porous non-metallic materials are characterized with the wetting contact angles at the level 73–103 degrees and rolling angles – 34–83 degrees (for porous carbonate materials). Rolling contact angles of porous silicate materials are within the 42–59 and 23–49 degrees. The maximum value of wetting contact angles are reduced to the level of 96–97 degrees. Water absorption of impregnated material is 1.4–3.4 wt. % (Limestone), 1.6–4.1 wt. % (Coquina), 0.8–2.2 wt. % (Sandstone) 1.9–18.4 wt. % (Tuff). Conclusion. The use of silicone compounds for impregnating the porous nonmetallic materials improves their physical and technical properties. Such materials are highly resistant to water and moisture, have high flexural and compression strength.
Authors and Affiliations
Nina Merezhko, Oksana Zolotarova
Keywords
Related Articles
- EP ID EP197321
- DOI -
- Views 142
- Downloads 0
ВОДНО-ДИСПЕРСІЙНІ ФАРБИ: КЛАСИФІКАЦІЯ ТА АСОРТИМЕНТ
Розроблено загальну та додаткову класифікацію водно-дисперсійних фарб (ВДФ) і покриттів з урахуванням сучасних вимог. Запропоновано підходи до формування асортименту ВДФ, які передбачають врахування їхнього призначення,...
Features of chopped meat masses with plant semi-finished products.
Background. Subject to the imbalance of essential nutrients in the food rations, the combination of vegetable and animal raw materials with different functional and technological properties becomes promising, enabling to...
БЕЗПЕЧНІСТЬ ХАРЧОВИХ ПРОДУКТІВ: НОВАЦІЇ СТАНДАРТУ ISO 22000:2018
Проаналізовано зміст міжнародного стандарту ISO22000:2018, порівнюючи його з попередньою версією. Встановлено основні методологічні відмінності нової редакції, ефективність якої обумовлена використанням ризик-орієнтовано...
HIGHLY EFFECTIVE SORBENTS FROM PRODUCTS AFTER PROCESSING AGRICULTURE RAW MATERIALS
Background. In Ukraine, a deterioration of the ecological state of water objects in the environment as a result of their contamination with heavy metals and organic compounds and the poor subsequent treatment of industri...
Biological value of broccoli protein.
Background. The biological value of vegetable protein is lower compared to animal one. Among vegetable crops only the proteins of potatoes and cabbage on the content of essential amino acids are close to the animal prote...