Cement-based penetrating crystalline waterproof coating is a gray powder material prepared with ordinary portland cement as base material and active chemical components. The waterproof mechanism of cement-based osmosis crystalline series waterproof coatings is mainly under the action of water. The waterproof coatings contain active chemicals with water as the carrier. With the penetration of water into the structural pores, the active chemicals penetrate into the interior with water and react to form ettringite and other insoluble crystals.
GENERAL
Cement-based penetrating crystalline waterproof coating is a gray powder material prepared with ordinary portland cement as base material and active chemical components. The waterproof mechanism of cement-based osmosis crystalline series waterproof coatings is mainly under the action of water. The waterproof coatings contain active chemicals with water as the carrier. With the penetration of water into the structural pores, the active chemicals penetrate into the interior with water and react to form ettringite and other insoluble crystals. The active chemicals react with unhydrated cement particles and promote cement hydration, form cement hydration crystals, generate a large number of crystals to fill and block pores so that water cannot enter the concrete to achieve the purpose of waterproof.
Scope of application
 |  |  |  |
It is widely used in the waterproof construction of tunnels, dams, reservoirs, power stations, nuclear power plants, cooling towers, underground railways, overpasses, bridges, underground continuous walls, airport runways, pile heads and pile foundations, wastewater treatment tanks, reservoirs, basements, roofs and toilets of industrial and civil buildings, as well as the maintenance and plugging of all structural defects such as concrete building facilities.
FEATURE
Product features
◆ With super permeability, it can gradually penetrate into the concrete over time. The penetration depth can reach 30cm.
◆Excellent impermeability, which can resist the pressure of water head above 120m.
◆It has long-term waterproof function and can withstand the collision of certain external force without affecting its waterproof function.
◆It is non-toxic, harmless, green and environment-friendly, and can be safely applied to concrete works for drinking water and food industry.
◆With unique self-healing ability, the formed crystals will not age. Even after many years, cracks and holes less than 0.4mm can still be closed after encountering water
◆The coating of paint, epoxy resin, cement mortar, lime paste, mortar and other materials can be directly accepted.
◆The construction method is simple and easy to operate.
PERFORMANCE
Performance GB 18445-2012 Cement-based penetrating crystalline waterproof coating
| Serial number | Testing item | Testing item | Performance metrics |
| 1 | Appearance | Uniform without caking | |
| 2 | Moisture content/% | ≤1.5 | |
| 3 | Fineness, 0.63mm sieve residue/% | ≤5 | |
| 4 | Chloride ion content/% | ≤0.10 | |
| 5 | Constructability | After mixing with water | free scraping |
| 20min | free scraping | ||
| 6 | Flexural strength/MPa, 28d | ≥2.8 | |
| 7 | Compressive strength/MPa, 28d | ≥15.0 | |
| 8 | Bonding strength of wet base surface/MPa, 28d | ≥1.0 |
Construction process
◆Scraping method: clean the sundries and floating mud and mortar on the base surface of waterproof coating, and repair the seriously uneven concrete base surface. The oil stain and sundries on the waterproof surface of the cement foundation structure shall be removed and cleaned, and then washed with clean water. The construction shall be carried out on the wet foundation surface and coated with waterproof materials. If serious leakage is found on the foundation surface, plugging materials shall be used for construction first, and then this material shall be used to ensure the project quality. The water cement ratio is 0.3-0.4:1, the dosage is 1.4-1.7kg/m2, and the thickness is 1.0mm (± 0.05mm).
◆Roller coating method: evenly roll the material on the treated base surface with a roller brush according to the dosage of 1.4-1.7kg/m2.
◆Dry spreading technique: the construction shall be carried out immediately after the concrete is poured, compacted and leveled. Spread evenly on the concrete surface according to the specified amount, compact and trowel in time. After final setting, check whether there are poor construction places and repair them in time; In case of exposure to the sun, it shall be watered for maintenance. Pay attention to spray evenly and do not cut corners.
Packaging, storage and transportation
Barrel, 25kg / barrel. Store in a ventilated and dry place and it’s shelf life is 3 months.
Copyright ©Sino-sina Building Materials Co., Ltd. Limited All Rights Reserved | Sitemap
