Cement-Based Penetrating Crystalline Waterproof Coating

product introduction

Cement-based permeable crystalline waterproof coating (abbreviation: CCCW) is made of inorganic materials such as Portland cement (known as Portland cement abroad), quartz sand and other inorganic materials, and infiltrated with active compounds and other auxiliary materials. It is a kind of light gray powder waterproof material. It is a green, non-toxic, tasteless, and pollution-free product. It is a rigid waterproof material, and its quality meets the national standard GB18445-2001.

Waterproof mechanism

After the active compound contained in the material reacts with water, it uses water as the carrier to penetrate into the pores of the internal structure of the concrete, and the active compound that penetrates into the pores of the concrete interacts with the free calcium oxide in the concrete to form water-insoluble dendrites. Fibrous crystals (calcium sulfoaluminate). The crystals absorb water and swell in the structural pores, from sparse to dense, so that the surface layer of the concrete structure gradually forms a dense impermeability area in depth, which greatly improves the overall impermeability of the structure. In the waterproof coating constructed with C-type waterproof coating, due to the bondage of hydration space and C-S-H gel, a large number of gel-like crystals are formed, which play a role of compactness and impermeability in the coating. Over time (generally 14~28 days) development, the amount of crystallization is also increasing. Both the gel-like crystals in the waterproof coating and the permeable crystals that penetrate deep into the concrete structure increase the compactness of the concrete structure, that is, enhance the impermeability of the concrete structure. Since the hydration reaction of cement is an incomplete reaction process, the reaction will still proceed after many years without losing water, and in the later stage of the hydration reaction process, it can also continue to catalyze the active compound to form crystals, so Even if the concrete structure is re-penetrated by water or partially damaged and cracked (the crack is less than 0.4mm), it can repair and heal itself under the action of crystallization. Stabilization brings cracking and seepage again.

Application range

This product can be widely used in tunnels, dams, reservoirs, power plants, nuclear power plants, cooling towers, underground railways, overpasses, bridges, underground diaphragm walls, airport runways, pile foundations, wastewater treatment pools, reservoirs, water plants, Waterproof construction of basements, roofs, toilets and bathrooms of industrial and civil buildings, as well as maintenance and plugging of all concrete structural defects such as concrete building facilities.

Features

1. Double waterproof performance:

The osmotic crystals produced by this product can go deep into the interior of the concrete structure to block the structural pores. No matter how deep it penetrates, it can play a waterproof role in the interior of the structure. It can play the role of compensating for shrinkage, and can make the structural base after construction also have good anti-crack and anti-seepage effects.

2. Strong resistance to water pressure:

This product can withstand strong water pressure for a long time. If two layers of this material are painted on a concrete specimen with a thickness of 50mm and a compressive strength of 13.8Mpa, it can withstand at least 123.4m of water pressure (1.2Mpa).

3. Unique self-healing ability:

This product is an inorganic waterproof material, and the crystals formed will not age. The crystal structure can still activate the cement to produce new crystals after many years of contact with water. The crystals will continue to compact, seal or reseal the cracks or pores smaller than 0.4mm, and complete the process. The process of self-healing.

4. It has the functions of anti-corrosion, aging resistance and protection of steel bars:

This product can self-repair the cracks and voids below 0.4mm, make the concrete structure more compact, increase the structural strength, thereby greatly reducing the intrusion of chemicals, ions and moisture, and protecting the steel bars from corrosion. The crystals do not affect the breathing ability of concrete, and can keep the inside of the concrete normally breathable, moisture-wicking, and dry. On the basis of keeping the inside of the concrete structure free from erosion, it prolongs the service life of the building. At the same time, the concrete structure treated with this material can effectively prevent spalling, weathering and damage caused by freezing and thawing.

5. It has a reinforcing effect on the concrete structure:

The concrete structure after construction of this product, because the unhydrated cement is activated, enhances the compactness and strengthens the concrete structure

, Generally, it can increase the strength of concrete by 20-30%.

6. Long-term waterproof effect:

The physical and chemical reaction produced by this product is initially on the surface of the base surface or adjacent parts, and gradually affects the interior of the structure and penetrates as time goes by. Under normal temperature, generally after 28 days, the active compound can make the osmotic crystal penetrate 10~35cm inside the concrete layer structure (the density of the concrete layer structure is sparse, and the penetration depth will be deeper). The crystals formed are stable and do not decompose. Even if the waterproof coating is worn or scraped off, it will not affect the waterproof effect, because its active ingredients have penetrated deeply into the concrete structure.

7. It has the advantages of simple construction method, saving labor and time:

This product is simple and convenient to apply. It can be applied by brushing, rolling, or scraping, or it can be applied by dry spreading. Under normal conditions, the construction task can be completed with one brushing, and there is no need to paint multiple times, saving time and labor.

8. Comply with environmental protection standards, non-toxic, non-polluting, and pollution-free:

The active compounds in this product are water-soluble compounds, which are non-irritating to human skin and non-toxic, and can be used in drinking, food, swimming pools, reservoirs and other engineering construction projects.

Technical indicators of cement-based permeable crystalline waterproof coatings (executive standard: GB/T18445-2012)