IMPREGNATION AND PROTECTION FOR CONCRETE
- EverCrete® Vetrofluid guarantees permanent water impermeability in both directions.
- It gives concrete a special resistance to frost-dew cycles and attacks of chlorides, sulfates and dew salts and completely prevents the phenomenon of carbonatization and any penetration of chlorides. It retains a permanent alkaline environment, which provides complete protection for reinforcement.
- EverCrete® Vetrofluid is certified for applications in drinking water systems and is suitable for sealing and protection of concrete containers and surfaces in the food sector.
- EverCrete® Vetrofluid gives concrete excellent protection against chemical attacks. It prevents rising water /steam on foundations.
- EverCrete® Vetrofluid prevents dust formation and thus efficiently inhibits the influence of pollutants on the environment.
- EverCrete® Vetrofluid is colourless, odourless and non-toxic. It complies with the requirements of 89/106 EEC Directives and meets the requirements of EN 1504-2.
The rate of concrete corrosion depends on the following factors:
Exposure of concrete – Dry concretes indoors or in weather-protected installation locations carbonate more slowly than concretes exposed to free weathering. Age of concrete – The rate of carbonation decreases with increasing concrete age according to the Root-Time Law. Because of this connection, it is appropriate to make statements about the progress of carbonation. Porosity of concrete – Due to the larger surface, porous concretes carbonate faster than dense concretes.
Carbonation is the chemical conversion of the alkaline components of the cement stone by CO2 into calcium carbonate. The pH of the cement stone decreases below pH <9 and the pore structure of the cement stone changes. The speed of carbonatization from the concrete surface into the concrete is highly dependent on the moisture content. A maximum of the carbonatization speed is set at 50 - 70 concrete moisture. Furthermore, the w/z value and the compressive strength determine the carbonation progress. Water-filled and/or closed capillaries prevent or slow down carbonation. That is, in conclusion as described below (EverCrete Vetrofluid reduces capillarity) low capillarity, lower carbonation. The tests listed below can also be used as evidence. Chloride transport
During the transport process, through which chloride ions enter the concrete via the structure pores, one distinguishes as follows:
First, the pure diffusion, in which the chloride ions penetrate the inside of the concrete from the outside due to a concentration gradient, and the water diffusion, in which the chlorides are transported with the diffusing water.
This process takes place when the concrete absorbs water capillary or when it dries out. In the latter case, there is a chloride enrichment on the surface. Under practical conditions, both operations will occur simultaneously or alternately, although the respective proportions are not exactly known. The size of the chloride diffusion is influenced by the following parameters, among others:
Concrete composition (cement types, cement content, water cement value)
- Degree of hydration of the concrete
- Water content of concrete
- Post-treatment (e.g. EverCrete Vetrofluid)
- Chloride content or concentration differentials
The EverCrete Vetrofluid now starts in this part, that it greatly lowers the capillarity of the concrete and thus results in a fairly constant moisture balance in the concrete and can penetrate almost no liquid media through the “pore closure”. This pore closure improves the concrete in other properties, such as significantly increasing abrasion resistance, increasing resistance to chemical attacks, higher high-pressure beam resistance, etc.
You can read about this from our test reports, which have carried out various tests to understand the capillarity reduction and the resulting results.
- Testing Water Impermeability ÖNORN B 3303 – EverCrete
1-3 day 1.75 bar, 4 – 14 day 7 bar (70 m water column), without EverCrete 63 mm, with EverCrete 16 mm
- Frost-dew salt resistance according to DIN CEN/TS 12390-9 CDF Rilem, various concretes – XF4 – EverCrete
The results show that weathering in sufficiently frost-dew salt-resistant stress according to the CDF test can be significantly reduced by the use of EverCrete during laboratory testing. This should also increase in practice the resistance of these concretes to a frost-dew salt attack and extend the non-harm-free useful life of the structures produced from them.
- Intrusion testing according to DAfStb directive “Concrete construction in the handling of water-hazardous substances” – EverCrete
The test results show that the application of Evercrete reduced the penetration quantities determined in the 72-hour impact test from an average of 1.06 l/sqm to an average of 0.37 l/sqm.
The application with Evercrete enabled the tightness of the concrete to be significantly
Further external examinations
- Carbonation UNI 9944 EverCrete
- Porosity measurement Certi Later – concrete with and without EverCrete
- chloride analysis of one of our partners according to ASTM C1556-03 Taywood method with
- results of the chloride surface concentration and the apparent
- chloride diffusion coefficients, but these are only meaningful compared to a zero sample.
- Further frost salt tests also according to ÖNORM
- Ammonia Test EverCrete
- Azeton Test EverCrete