Fiber-Reinforced Building Composites Based on Mineral Binders: Fid-Bau Portal

Fiber-Reinforced Building Composites Based on Mineral Binders

Galautdinov, Albert / Mukhametrakhimov, Rustem

Currently, the volume of production of modified fiber composites based on mineral binders tends to decrease, due to a drop in demand for them as the alternative materials, including foreign ones, have entered the market. Traditionally obtained fibrous composite materials and products have a number of disadvantages, which significantly limits the range and scope of their application. Due to that fact, the significant interest is in the development of modified fibrous composite materials based on mineral binders, the study of the processes of their structure formation, properties and improvement of production technology. The paper studies the role of the type of reinforcing fibers in the formation of the structure and properties of composites based on cement and gypsum binders. It is shown that the maximum strength of fiber-cement composites is provided at a degree of fineness of cellulose fibers of 30–40°ShR with their content in the matrix in amount of 5–6% by the mass of solid components, the best records are achieved with a specific surface of silica sand of 310 m²/kg. It was revealed that the optimal coefficient of fiber reinforcement of a gypsum-cement-puzzolanic matrix with cellulose fibers is 0.5–1% by the binder mass at a degree of fineness of cellulose fibers of 30°ShR. The significance of the results for the construction industry lies in the possibility of obtaining fiber composites based on mineral binders with improved performance characteristics and durability, which will expand the scope of their application and increase their competitiveness in comparison with analogues.