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A platform for research: civil engineering, architecture and urbanism
Corrosion of concrete in marine structures
Conclusions 1. Under episodic action of seawater on concrete, there is a gradual accumulation of sulfate and magnesium ions, for which, over long periods, the magnesium content increases and the sulfate content initially increases and then decreases. 2. Maximum accumulation of seawater salt components occurs at a certain distance from the surface, where, to the least extent, the cement stone carbonization effect is manifested, and lixiviation of gypsum and calcium oxide is difficult. In this case the significant decrease in the content of calcium compounds is attended by an increase in the content of calcium hydrosulfoaluminate and the main aggressive ions of seawater. 3. As the distance from the concrete surface increases, the CaO content also increases and the content of ions of magnesium, alkaline earth metals, and sulfate decreases. 4. The data about changes in the chemical composition of concrete during its service period indicate that for prolonged resistance of concrete of marine structures under these conditions it is necessary to increase its density in order to make difficult the contact between the aggressive ions of seawater and the cement stone surface. Carbonization of the concrete is also an important factor for increasing its resistance.
Corrosion of concrete in marine structures
Conclusions 1. Under episodic action of seawater on concrete, there is a gradual accumulation of sulfate and magnesium ions, for which, over long periods, the magnesium content increases and the sulfate content initially increases and then decreases. 2. Maximum accumulation of seawater salt components occurs at a certain distance from the surface, where, to the least extent, the cement stone carbonization effect is manifested, and lixiviation of gypsum and calcium oxide is difficult. In this case the significant decrease in the content of calcium compounds is attended by an increase in the content of calcium hydrosulfoaluminate and the main aggressive ions of seawater. 3. As the distance from the concrete surface increases, the CaO content also increases and the content of ions of magnesium, alkaline earth metals, and sulfate decreases. 4. The data about changes in the chemical composition of concrete during its service period indicate that for prolonged resistance of concrete of marine structures under these conditions it is necessary to increase its density in order to make difficult the contact between the aggressive ions of seawater and the cement stone surface. Carbonization of the concrete is also an important factor for increasing its resistance.
Corrosion of concrete in marine structures
Ivanov, F. M. (author) / Ulanovskii, I. B. (author) / Dorofeeva, Z. F. (author) / Khodikov, K. D. (author)
Hydrotechnical Construction ; 14 ; 811-814
1980-08-01
4 pages
Article (Journal)
Electronic Resource
English
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