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 Methodologies to determine permeability and diffusivity in cementitious materials
Tác giả hoặc Nhóm tác giả: Quoc Tri Phung, Norbert Maes
Nơi đăng: CEBAMA WP1 Experimental studies – State of the art literature review; Số: Deliverable D 1.03;Từ->đến trang: 55-72;Năm: 2016
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
Durability and performance of concrete are affected by a number of chemical degradationphenomena such as carbonation, calcium leaching, sulphate attack, chloride attack, and corrosion of the reinforcement bars. Diffusivity and permeability as macroscopic properties of concretedetermine how fast aggressive substances penetrate into concrete, thereby influencing almost allmentioned degradation mechanisms. Therefore, these are fundamental parameters for characterizing long-term performance of concrete rather than the standard compressive/tensile strengths. In this section, a critical review on permeability and diffusion of cement-based materials is presented. The existing methods, influencing factors and prediction of transport properties are introduced. The advantages and disadvantages of different techniques are discussed.
ABSTRACT
Durability and performance of concrete are affected by a number of chemical degradationphenomena such as carbonation, calcium leaching, sulphate attack, chloride attack, and corrosion of the reinforcement bars. Diffusivity and permeability as macroscopic properties of concretedetermine how fast aggressive substances penetrate into concrete, thereby influencing almost allmentioned degradation mechanisms. Therefore, these are fundamental parameters for characterizing long-term performance of concrete rather than the standard compressive/tensile strengths. In this section, a critical review on permeability and diffusion of cement-based materials is presented. The existing methods, influencing factors and prediction of transport properties are introduced. The advantages and disadvantages of different techniques are discussed.
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