Abstract
The article deals with the problem of increasing the durability of underground and buried buildings. One of the methods of solving this problem is ensuring the reliable protection of underground structures from the effects of water of different origin. Among the existing waterproofing coatings, mineral-based compositions are the most effective. However, the main disadvantage of such systems is the low crack resistance of hard coatings, which limits their applicability. We have made an attempt to develop a cement-based waterproofing material that would have high elasticity, strength, crack resistance and adhesion to a concrete base. We have conducted studies to justify the possibility of obtaining an effective waterproofing material by including microsilica and ethylene vinyl acetate in the mix. The optimal composition of the material was worked out. On the basis of the experimental data, the main physical and mechanical properties of the material were established. Based on the obtained results, it was found that the resulting material had high physical and mechanical characteristics and could be recommended for the protection of concrete structures used in underground construction.
Highlights
The development of the underground space of large cities is one of the main directions of modern construction
Various types of waterproofing coatings based on bitumen, bitumen-polymer and polymer roll and mastic materials; steel and plastic sheets, bentonite mats, as well as mineral-based compositions are used to protect underground structures [2,3,4,5,6,7]
The main physical and mechanical characteristics of the waterproofing cement-based coating material with additives of microsilica and ethylene vinyl acetate were carried out according to standard methods [18-22]
Summary
The development of the underground space of large cities is one of the main directions of modern construction. In order to increase the elasticity of the coatings, waterproofing cement compositions modified with acrylic emulsion have been developed; they are able to provide crack bridging up to 0.5 mm [2, 10]. Such compositions have low frost resistance and adhesion to the concrete surface. The analysis of materials used in waterproofing systems indicates the need to develop an effective elastic mineral-based coating material to protect the underground parts of buildings and structures, which would be devoid of the above disadvantages
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