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08/05
2016
Concrete surface treatment and chlorine ions cause corrosion of steel
Research data show that the sodium chloride and concrete components together into the new mixed concrete, when the chloride content of cement quality 0.4%~0.8%, steel corrosion significantly.
TAG:
Concrete
08/05
2016
Concrete surface treatment and chloride ions lead to corrosion of steel bars
Waterproof treatment of concrete surface chloride ion erosion tests show that, the waterproof processing can form on the surface of concrete chloride ion good isolation layer, by reducing capillary water absorption effect to prevent chloride ion invasion, significantly reduced the content of chloride ion in concrete. At the same time, the surface treatment of the permeable coating does not affect the internal water loss. When the relative humidity of concrete is reduced to a certain degree, the corrosion rate of the steel bar will obviously decrease.
TAG:
Concrete
08/05
2016
Effect of surface treatment on carbonation of concrete—— the influence of coating type
Compares the effect of concrete carbonization coating surface treatment of outdoor environment after the rain infiltration, as shown in figure 5.13. The results showed that the treatment effect was better than that of the emulsion with the same amount of surface treatment and the same number of times.
TAG:
Concrete
08/05
2016
Effect of surface treatment on carbonation of concrete -- the influence of water binder ratio
After silane penetration coating surface treatment, the concrete still has good air permeability, concrete internal moisture can be evaporated from the surface, it will not affect the diffusion and migration of CO2 to the concrete interior. Figure 5.4 for the water content of up to 9% of the cement mortar test block with silane surface treatment, dry conditions in the natural environment. After 3D, the residual moisture content is 3%~4%, the evaporation rate of water is close to that of common cement test block, which shows that the surface treatment does not affect the moisture content of the concrete, that is, it will not affect the permeability of the concrete. In view of this, permeable coating surface treatment of concrete while reducing the gross of water, but the permeability and no change, after surface treatment of concrete of with and without surface treatment of concrete carbonization performance should be basically the same.
TAG:
Concrete
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