Abstract
Since the rise of cement-based building elements, there has been a need to seal these materials. Therefore, this article deals with the sealing of cement-based materials, specifically glass cement. The aim of this work is to find a sealant for sealing this problematic substrate, to verify its suitability and to show that polyurethane sealants are also important in the construction market. The problem of a cement-based substrate lies mainly in the dustiness of its surface, where there are always small dust particles on its surface. The main method for testing these sealants is the tensile test, which checks both the properties of the sealant itself and the contact joint between the sealant and the base material. Tensile test specimens are made of glass-cement plates and three representatives of one-component flexible polyurethane sealants are selected as the sealing material. From the results of the tensile test, it can be concluded that, with the appropriate choice of sealant and primer, problematic cement-based materials with good results can be sealed, provided that the grinding is carried out correctly.
Highlights
Our society has been cementing materials practically since the beginning of construction history
Cemented joints have developed over time, but we have shifted from the original natural materials to the area of the chemical industry
Due to the significant expansion of the chemical industry, great advances have been made in the development and application of sealants in the field of cemented joints over the last two decades [1]
Summary
Our society has been cementing materials practically since the beginning of construction history. We still need to bond various materials together today, and we can see cemented joints virtually everywhere. Cemented joints have developed over time, but we have shifted from the original natural materials to the area of the chemical industry. Due to the significant expansion of the chemical industry, great advances have been made in the development and application of sealants in the field of cemented joints over the last two decades [1]. Cement joints are a common part of the building industry, and we could not imagine modern construction without them. Their main aim is to prevent substance exchange between the construction materials and external environment. Obviously there are significant differences between the individual cemented joints [2,3]
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