Bridge anti-corrosion and carbon protection overall coating.

First, the cause of concrete carbonation
Concrete carbonation refers to the atmospheric carbon dioxide first eroded into the pores inside the concrete, and then dissolved in the capillary holes of water, and cement hydration process produced by calcium hydrate and calcium hydroxide and other hydration products interact to produce carbonic acid, calcium and other products. Therefore, concrete carbonization is due to the existence of pores in concrete, which is full of water and air, in the concrete gas phase, liquid phase, solid phase in a very complex multiphate physicochemistry continuous process.
1, the internal factors affecting the carbonization of concrete
different cement, its mineral composition, mixture volume, admixture, biochemical composition is different, directly affecting the activity of cement
and the alkalinity of the suspect soil, the carbonization speed has an important impactIn general, the more ceding in cement, the slower the carbonization of concrete. Adms (water-reducing agents, gas introducers) can generally improve impermeability and slow down the rate of carbonization, but chlorine-containing antifreeze, early strong agent will seriously accelerate the corrosion of steel bars, should strictly control its dosage.
varieties and grades, the internal pore structure is very different, which directly affects the compactness of concrete. Material dense
solid, graded with better set of concrete, its carbonization speed is slow.
Increase the amount of cement, on the one hand, can change the concrete and ease, improve the solidity of concrete, on the other hand, can
increase the alkaline reserves of concrete, so that its anti-carbonization performance is enhanced, the rate of vulcanization with the increase in cement use and reduce.
Under certain conditions in cement use, increase the water ratio, the porosity rate of concrete increases, the intensity decreases, the permeability increases,
air moisture and harmful chemicals more into the concrete body, accelerate the sulfurization of suspected soil.
poor construction quality is reflected in the inexplorable vibration, resulting in low concrete strength, honeycomb, hemp surface, hollow, for the atmospheric carbon dioxide and water infiltration to create conditions, accelerate the carbonization of concrete.
the soil is formed, it must be maintained in a suitable environment. Good maintenance mix: suspect soil, and have good gel, high strength.
solid shell and strong corrosion resistance, can prevent the atmosphere of water and carbon dioxide into its internal, slow down the rate of carbonization.
2, the external factors affecting the carbonization of concrete
acidic gas (e.g. CO II) involved in the concrete pores dissolved in the concrete surface to form acid, with the cement stone calcium oxide, silicate, aluminumate and other compounds neutral reaction, resulting in gradual degradation of cement stone, concrete alkalinity
low, which is the direct cause of concrete carbonization. Experimental studies have shown that the carbonization rate of concrete is directly related to the square root of carbon dioxide concentration, i.e. the velocity coefficient of concrete carbonization accelerates with the increase of carbon dioxide concentration.
In the area of concrete warm water saturation or water level change, due to alternating temperature changes, so mixed: suspect soil internal pore water alternately frozen
expansion and melting relaxation, resulting in mixing; Leakage will cause the loss of calcium hydroxide in mixed
coagulation, form calcium carbonate crystallization on the concrete surface, causing the decomposition of concrete hydration products
, the fruit of which is to seriously reduce the strength and alkalinity of concrete, and worsen the corrosion conditions of the cave ribs.
the temperature of concrete plummets, its surface harvest produces a pull force, once the strength of the concrete, the concrete surface will crack,
lead to the formation of cracks or gradually fall off, creating conditions for carbon dioxide and moisture involved, accelerate the carbonization of concrete.
II, concrete carbonized anti-corrosion overall coating technology
Kangli energy concrete corrosion-resistant materials combine the advantages of osmosis and film-forming concrete protective materials, and through clever molecular design to make the protective materials form a three-way protection system, can effectively improve the service life of concrete, and has a good decorative effect.
The material can penetrate into the concrete 1 to 3mm, and chemical reaction with the active ingredients in the concrete to form a solid silicate structure, while the film coating gives the material good anti-aging performance, high and low temperature resistance, chemical corrosion resistance and color ability. Concrete corrosion-resistant material is a two-component protective material, with excellent resistance to chlorine ion erosion, acid-base erosion, waterproof, breathable, carbon-resistant properties, can effectively improve the service life of concrete structure and improve the appearance of concrete.
Compared with acrylic coatings, silicate coatings and water-based fluorocarbon coatings, concrete corrosion-resistant materials have better water resistance, anti-chloride ion erosion and anti-freeze melting cycle ability, at the same time, Kangli's coating of water vapor through the rate of up to 70%, effectively avoiding the coating drum pack caused by the loss of protection from twilight to failure.
product features:
excellent waterproof, anti-chloride ion erosion performance, can reduce water penetration of more than 90% and chlorine ion penetration of more than 85%, greatly delay the deterioration of concrete; , water vapor through rate of up to 70%, color adjustable, provide GSB16-1629-2003 color samples (mainly cement ash and beige, if there are special needs can be customized), bright light, semi-light and matte effect, can be decorated concrete;
recommended
: anti-corrosion, decoration, protective coating of bridge structures,
protection of old concrete, Decorative (requires supporting concrete thin layer repair glue use);
the protection of clear water concrete;
construction process:
1, substrate treatment: for new concrete structures, the surface must be clean, oil-free, flotation and loose materials. For new defective concrete and old concrete, repair (a thin layer of bone-free patching glue is recommended) and flatten the substate, and then apply concrete corrosion-resistant materials after the repair layer maintenance is complete. It is recommended to wash with a water cannon and brush when the water content of the substrate is less than 60%.
2, mix: in a clean container, add B components to component A, mix with a low-speed blender, be sure to stir until the parts are colorless.
3, construction: can be used airless spray or roller coating way of construction. Rain and snow weather is strictly prohibited construction, in principle, brush once can be, if there is a clear color difference or defects can be the first brush table dry after the second brush.
4, maintenance: 24h after construction to avoid contact with cloudy water. If the rainy season should pay as much attention to the weather forecast as possible, so as not to encounter rain damage in a short period of time after construction, within a week is strictly prohibited man-made damage.
.