According to incomplete statistics, China's total commercial concrete in 2018 was 2.547 billion cubic meters, 2019 total commercial concrete was 2.738 billion cubic meters, 2020 total commercial concrete reached 2.899 billion cubic meters, China's concrete consumption has ranked first in the world for more than 30 consecutive years.

Concrete was widely used in construction engineering and became a core force of construction engineering.The concrete structure is dense, itself has a certain waterproof ability, but in practical application, often will be done after the concrete pouring additional waterproof, this is why?

"Defects" of the concrete

Concrete structure naturally has many capillary pipes, subtle cracks (generally not visible to the naked eye) and holes, which is a "congenital deficiency".In the construction process of manual operation, there will be uneven mixing, not dense vibration, sprinkling maintenance is not in place, honeycomb, hemp surface, pores, cracks and cracks, low strength problems, which is the "acquired defect".

The above hidden dangers, defects have become the weak link of concrete, but also give water into the "channel" in the concrete structure, water under a certain pressure through these capillary pipes, cracks, holes slowly seepage into, therefore, although the concrete can be waterproof, but it is difficult to prevent seepage.

Effect of the water on the safety of the concrete structure

The destructive force of the water is huge, especially to the corrosion of the reinforced concrete.Water goes deep into the structure through the concrete capillary pipes, pores and microcracks to corrode the steel bars in the structure, which leads to the steel bar corrosion and expansion, the concrete collapse, and the cracks are further enlarged.

The cracks become larger, the internal seepage of water is more rapid, the corrosion will be more severe, the circulation, will damage the overall durability and safety of the building structure, leading to the building scrapping or serious safety accidents.

In this way, although the concrete has a waterproof function, but the concrete inevitable pore cracks will continue to enlarge the hidden danger of water seepage, if not another waterproof, leakage problem cannot be avoided.

Internal and external with prevention, to create a hundred years without leakage of concrete

To provide effective waterproof protection for the concrete structure, it is necessary to start from the internal and external two angles at the same time, internal prevention, external prevention, internal and external combination, complement each other.

Internal waterproof mainly: improve the waterproof performance of concrete own seepage

As the saying goes, making iron still needs to be hard by itself.To improve the waterproof and impermeability performance of the concrete structure, we also have to start from the concrete itself.

Before concrete mixing, that is, add the internal waterproof material, stir after pouring, make it thoroughly into the concrete structure, and then the internal chemical reaction, to activate the "self-healing" performance of concrete, dense blocking concrete internal pores, micro cracks, let the concrete more dense, so as to improve the permeability, to achieve the role of permanent waterproof seepage resistance.

Jiushi SJ-1 self-healing inorganic proliferator is the concrete with waterproof material, containing amorphous active silicon and water, cement calcium hydroxide reaction, generation of calcium silicate crystal, large Angle, large area of reproduction filling concrete pores, micro cracks, improve density, while the crack to self-healing, and permanent waterproof moisture resistance, also can greatly extend the life of concrete.

External waterproof is auxiliary: block the concrete surface to achieve waterproof and seepage resistance

After the concrete pouring is completed, out of insurance, an additional layer of waterproof will be made on the surface of the structure.

The surface of the concrete structure suffers from various erosion, which is easy to wear and carbonize, and becomes a weak link of water invasion. Therefore, the external waterproof requires a dense concrete surface, and forms a "protective barrier" on the surface layer to prevent the internal seepage of water.

External waterproof is more common is coated with film waterproof, coil waterproof, most of such materials are "outsourcing type" waterproof, short life, easy to damage, and has a certain harm, gradually out of touch with the new national waterproof standards.

Therefore, the permeable crystalline waterproof material that can be deeply penetrated and integrated with the structure and has the same life has become the new trend of external waterproof.

Jiagushi SK series nano-silicon ion immersion reformant is a "three-dimensional crystal type" waterproof material that has won the national invention patent and was recognized by the Shanghai Science and Technology Research New Consulting Center of Chinese Academy of Technology to reach the international advanced level.

SK series nanosilicon ion permeable modifier can deeply penetrate into the concrete internal 30-50mm for chemical reaction, generate calcium silicate crystals fully filled into the concrete internal pores and subtle cracks, make the concrete tightness is better, so as to inhibit the production of concrete cracks, improve the waterproof level, cut off the seepage channel, fundamentally solve the problem of building water leakage.

Proliferator and nano-silicon ion permeable modifier jointly form a Christie permeable crystalline self-healing waterproof system, combined with internal and external injection, complement each other, to give a comprehensive protection of the concrete structure, to solve the permanent waterproof problem and greatly extend the service life of the structure.

With both internal and external protection, the goal of the century-old project of concrete structure can be truly realized!