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In the past 10 years, this material has been used in waterproofing leak-proof construction works in many projects in Guangzhou. For example, waterproof traps used in underground works include the basement of Mayor Mansion, the basement of Yi'an Mansion, the basement of Tianhe District Government Building, the basement of good world basement, the basement of the office building of Haizhu Science and Technology Park, and the motor vehicle tunnel of the Olympic Sports Center. Used in the Luqiao Waterproof Project are: Xiebian Hub overpass bridge in Nanhai City, Wushan Road, South China Expressway trunk repair cracks, Jinshazhou Bridge and so on.
Cement-based penetrating crystalline waterproof material is also a non-gas, odorless, non-toxic, non-polluting green environmental protection material, which can be used for waterproof mending of drinking water pools and water plant reservoirs. The use of this material is a leakage trapping project for the sheep water storage tank in Shunde City. Also, compared with other waterproof materials, cement-based osmotic crystalline waterproof material has the unparalleled superiority of back surface construction. For example, Panyu Lijiang Garden and other residential properties, in the repair of the leaking of the toilets and baths of the inhabited buildings, adopt the above-mentioned backwater surface construction method to achieve immediate results, which not only resolved the contradiction between the upper and lower households, but also Save the occupants a large amount of maintenance costs.
Its unique waterproof mechanism, superior waterproof performance is the main reason people are increasingly accepted. The cement-based permeation crystalline waterproof material is different from the traditional waterproof material. Traditional waterproof materials such as coils, film-forming waterproof coatings, waterproof ointments, etc., are made of waterproof material that wraps around the concrete structure itself and does not allow water to seep or seep through. This is a physical effect. It is just like wearing a raincoat. When this raincoat breaks, it cannot be waterproof. When a person jumps in a raincoat into a pool, it cannot be waterproof when soaked in water. Cement-based penetrating crystalline waterproof material is different. It is like a doctor giving injections, taking medicines, and improving people's immunity. It is a chemical effect that fundamentally improves the self-water resistance of concrete structures.
The cement-based permeation crystalline waterproof material is a powdery material made of common Portland cement, quartz sand, etc., and is blended with a special active chemical substance (it is a catalyst).
According to the analysis, the hardened concrete consists of crystals, colloids, incompletely hydrated cement particles, free moisture, and pores that make up an inhomogeneous structure. Also, in the process of hydration of cement, one-third of the cement is hydrating, one-third is semi-hydrated, and one-third is completely unhydrated. The catalyst of the cement-based permeation crystalline material utilizes the porosity of the concrete structure to enter (infiltrate) the concrete structure with water as the carrier, and the water will cause the cement not yet fully hydrated to continue the hydration reaction. The catalyst is a complex of calcium, the particles are very fine, and it works at lower concentrations (0.01 ppm). The calcium cation (Ca++) in the Ca complex binds with the (SiO3--) anion in the concrete to form water-insoluble CaSiO3 (nH2O) present in the voids of the concrete. After decomposing the complex after Ca++, the remaining (CAT-L) anion diffuses again into the Ca++ ion region formed by Ca(OH)2, and then reacts again to form a complex of Ca. Thus, the cycle, the reaction, Proliferated CaSiO3 (nH2O) crystals. The infiltration of these catalysts into the interior of the concrete results in the integration of the crystals with the concrete to form a whole, thereby increasing the compactness and strength of the concrete structure. It is consistent with the expansion coefficient of concrete, is not easy to produce cracks, cracks and self-healing, so it can withstand strong water pressure, its waterproof effect is permanent. At the same time, it does not block the breath of concrete.
The cement-based penetrating crystalline waterproof material is suitable for construction on a wet base surface. The catalyst is on the wet base surface, utilizing the porosity of the concrete structure, through the capillary phenomenon, and using its "hydrophilic" ability to infiltrate into the concrete structure with water as the carrier until it reaches the concrete with cracks and leaks. local. Where it meets water, it promotes hydration of water and unhydrated cement to crystallize, repair concrete defects and cracks, thereby blocking the water, achieving the purpose of waterproofing and improving the self-water resistance of the concrete.
Because it has the above characteristics, it can be used as a water-proofing function in the construction of the water surface or the back surface, as long as it has an environment and an opportunity for the catalyst to penetrate. Therefore, it is an excellent material for construction on the back surface.
Cement-based penetrating crystalline waterproof material has emerged quietly in the waterproof field. In the early 1990s, the cement-based penetrating crystalline waterproof material started to enter the Chinese market with its mysterious colors. At the time, in the eyes of those who were in the waterproof industry, a material that was applied to the concrete base surface, did not form a film, did not pursue thickness, was invisible to the eyes, and was synonymous with cement, was said to be water-repellent, and could enable the concrete structure to have a waterproof capability. Incredible! Everyone is skeptical about it. In 1994, XEPEX, a brand of this type of material, took the lead in the successful construction of plugging construction in China's subway project (Shanghai Metro). Afterwards, through the promotion of the Guangzhou Metro Special Company and the distributor (Tsuen Wan Huiyuan Industry & Trade Company), the platforms and sections of the Guangzhou Metro Line 1 have been used by XEPEX (Sebass) for plugging and repair, and have achieved success. effect. At this point, cement-based penetrating crystalline waterproofing materials have begun to be recognized and accepted by people.