Studying the efect of nanoliquids on the operational properties of brick building structures
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 5, Issue 6
Abstract
<p>The study reported here has established that the ceramic facing brick is characterized by capillary porosity that increases indicators of water absorption and capillary pull, as well as efflorescence formation at its surface. In order to protect the surface of such a brick and to provide it with the improved performance properties, we have used hydrophobizing substances. We have determined experimentally that the application of the PMPhS- and AP-based hydrophobizing agents leads to a decrease in porosity by 1.2-1.3 times, in water absorption ‒ by 1.2‒2.3 times, in water absorption at capillary pull ‒ by 1.1‒3.2 times. Research into frost resistance has found that for the ceramic brick, covered with PMPhS, it increases by 15 cycles, and when treating a brick surface with AP ‒ by 20 cycles, compared to the untreated brick (F50). By employing an electron microscopy, it was determined that the alternating freeze-thawing leads to that the brick's surface, treated with PMPhS and AP, demonstrates the formation of microcracks (in this case, water absorption increased by 42 and 28 %). By applying a method of mathematical planning of the experiment, it was found that the most effective hydrophobizing substance is the modifier that contains the nano-Al<sub>2</sub>O<sub>3</sub> powder (a nano-liquid). It was determined that when treating the surface with a nano-liquid (the amount of nanо-Al<sub>2</sub>O<sub>3</sub> is 0.8 %), its water absorption decreases to 1.2‒1.6 %, its water absorption indicator at capillary pull ‒ to 0.08‒0.12 kg/m<sup>2</sup>∙h<sup>0.5</sup>. Using a method of defectoscopy, applying the Karsten tube, it was found that water absorption for the brick whose surface was coated with a nano-liquid reduced from 0.15 to 0.002 ml/cm<sup>2</sup>, indicating a high level of hydrophobization. The electron microscopy method confirmed that the modification of the ceramic brick surface by the hydrophobizing nano-fluids makes it possible to compact the structure through the colmatation of pores and microcracks, which reduces the capillary pull of the brickwork. That also leads to the improved atmospheric and frost resistance of brick building structures.</p>Thus, there is a reason to argue about the possibility of improving the physical and technical indicators of the brick building structure by modifying the surface of the ceramic facing brick by a nano-fluid
Authors and Affiliations
Tetiana Kropyvnytska, Roksolana Semeniv, Roman Kotiv, Andriy Kaminskyy, Vladyslav Hots
Keywords
Related Articles
- EP ID EP528187
- DOI 10.15587/1729-4061.2018.145246
- Views 74
- Downloads 0
Application of intelligent processing of data flows under conditions of river navigation
<p>Implementation of a context-oriented approach for intelligent processing of navigation data flows in operation of water vehicles was considered. The initial sample of processing data flows in the conditions of the cur...
Construction of an integrated criterion for estimating the consequences of emergencies involving dangerous goods
<p>The paper reports a method for estimating the consequences of emergencies involving dangerous cargoes when they are transported by railroad transport. The method is based on constructing an integrated criterion, which...
Development of the method of frequencytemporal representation of fluctuations of gaseous medium parameters at fire
<p>The method of operative frequency-temporal representation of fluctuations of gaseous media parameters at an early stage of fire at premises was developed. The basic assumptions about the peculiarities of dynamics of h...
Modeling the elastic impact of a body with a special point at its surface
We have considered the elastic straight impact along a flat border of the stationary half-space of the body bounded in a zone of contact interaction by the surface of rotation, whose order is smaller than two. The featur...
Construction of the method for building analytical membership functions in order to apply operations of mathematical analysis in the theory of fuzzy sets
<p>This paper considers four methods for finding parameters of the analytical expressions of sigmoids, data on which are given numerically. We have conducted a comparative analysis of the approximation effectiveness usin...