Effects of Nano-liquids on the Durability of Brick Constructions for External Walls

The effectiveness of the influence of modifying substances on the properties of ceramic facing brick and masonry surface for decorative external walls is considered in the article. X-ray diffraction and spectral analysis showed that sodium sulfate, potassium sulfate and syngenite are the salt effloresces from the ceramic brick surface. It is established that polymeric one-component coatings based on siloxanes are not effective, especially under the action of alternating temperatures. Studies have shown that the improvement of the performance properties of ceramic facing brick increase due to the surface coating by nano-liquids with the addition of nano-Al2O3. The surface modification of the ceramic facing brick by hydrophobic nano-liquids allows sealing the structure due to the colmatation of pores, which reduces the capillary tightening of the masonry. It also leads to increased weather resistance and frost resistance of masonry. It is established that the surface protection of brick structures with hydrophobic nano substances provides a decrease in the porosity, increase the water resistance and durability. This allows to confirm the relevance of the revealed influence of the modifiers on the formation of properties and the practical attractiveness of the proposed technological solutions.