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Water permeability of polymer-impregnated concrete based on low volatile methacrylate monomer
Methods for increasing the durability of concrete include the polymer impregnation method. Filling concrete pores with polymer results in a decrease in permeability to air and water, and hence prevents harmful substances from flowing into and out of the concrete, leading to enhanced durability. Methyl methacrylate (MMA) and styrene monomers are typically used as impregnants. Because these monomers are highly volatile, a treatment to prevent evaporation is required during the period between impregnation and polymerization during the production of polymer-impregnated concrete. 2-hydroxyethyl methacrylate monomer, which has a hydroxyl group, exhibits relatively low viscosity and low volatility. Our experimental results confirm that combining the use of this low-volatility monomer as an impregnant with AE concrete as the substrate concrete can decrease water permeability in concrete without anti-evaporation treatment. The water permeability is effectively decreased by impregnation and polymerization of 2-hydroxyethylmethacrylate using AE concrete without the anti-evaporation treatment. Polymer impregnation resulted in a decrease or increase in the number of pores with radii of 3 nm to 2000 nm. Polymer impregnation also resulted in decreased pore volume and water permeability of AE concrete, but caused increases in pore volume and water permeability of plain concrete. When a concrete element with thicknesses of 20 mm to 50 mm were used, the impregnation depth over 10 mm is achieved by impregnation under de-aeration from one side. The impregnation under de-aeration is likely to be a successful method of applying impregnation to the manufacturing process of concrete products.
Water permeability of polymer-impregnated concrete based on low volatile methacrylate monomer
Methods for increasing the durability of concrete include the polymer impregnation method. Filling concrete pores with polymer results in a decrease in permeability to air and water, and hence prevents harmful substances from flowing into and out of the concrete, leading to enhanced durability. Methyl methacrylate (MMA) and styrene monomers are typically used as impregnants. Because these monomers are highly volatile, a treatment to prevent evaporation is required during the period between impregnation and polymerization during the production of polymer-impregnated concrete. 2-hydroxyethyl methacrylate monomer, which has a hydroxyl group, exhibits relatively low viscosity and low volatility. Our experimental results confirm that combining the use of this low-volatility monomer as an impregnant with AE concrete as the substrate concrete can decrease water permeability in concrete without anti-evaporation treatment. The water permeability is effectively decreased by impregnation and polymerization of 2-hydroxyethylmethacrylate using AE concrete without the anti-evaporation treatment. Polymer impregnation resulted in a decrease or increase in the number of pores with radii of 3 nm to 2000 nm. Polymer impregnation also resulted in decreased pore volume and water permeability of AE concrete, but caused increases in pore volume and water permeability of plain concrete. When a concrete element with thicknesses of 20 mm to 50 mm were used, the impregnation depth over 10 mm is achieved by impregnation under de-aeration from one side. The impregnation under de-aeration is likely to be a successful method of applying impregnation to the manufacturing process of concrete products.
Water permeability of polymer-impregnated concrete based on low volatile methacrylate monomer
Fukuzwawa, K. (author) / Funato, T. (author)
2004
7 Seiten, 7 Bilder, 3 Tabellen, 1 Quelle
Conference paper
English
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