By applying Sabiran A to the surface of reinforced concrete, the rust inhibitor (nitrite ions) penetrates and forms a passive film on the rebar, achieving rust prevention treatment!
This technology is a rust prevention method that applies a penetrating rust inhibitor to the surface of reinforced concrete to non-destructively protect the internal rebar from rust. While traditional methods have existed for applying coatings to the surface of reinforced concrete, they have been effective in suppressing the entry of external deterioration factors but have had little effect on already existing deterioration factors (such as chloride ions and areas of carbonation), resulting in insufficient rust prevention effectiveness. In this technology, a newly developed high-penetration rust inhibitor (Sabiran A) is applied to the surface of existing concrete and allowed to penetrate sufficiently into the interior (the surface tension of Sabiran A is 1/2.7 that of conventional products), non-destructively suppressing the latent deterioration of the rebar caused by internal deterioration factors. Furthermore, by applying a water-tightness enhancing agent (Sabiran P), the method simultaneously suppresses further entry of external deterioration factors, thereby providing long-term and stable rust prevention effectiveness for the rebar within the reinforced concrete. ■ Technical Explanation of the Improved Penetration of Sabiran A The rust prevention effect of Sabiran is achieved through the action of a rust inhibitor composition that contains the following composite surfactants: - Specific ether-type nonionic surfactants (maximum surface tension reduction capability) - Water-insoluble specific surfactants (significant wettability enhancement capability)
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basic information
【Applicable Conditions】 1. Natural Conditions - The outdoor temperature and concrete surface temperature must be within the range of 5 to 40 degrees. However, this does not apply when winter measures (such as thermal curing) are implemented. - The construction surface must not be wet due to rain or other factors. If it becomes wet, appropriate curing methods will be necessary. 2. Site Conditions - The cover depth of the rebar must be within 50 mm. - Protective clothing, rubber gloves, and protective goggles or face shields must be worn during work. - The application of penetrating rust inhibitors and water resistance enhancers should primarily be done using rollers or brushes. 3. Areas Where Technical Support is Available - No specific restrictions. 4. Relevant Laws and Regulations - None in particular.
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Applications/Examples of results
【Applicable Uses】 - Repair of existing reinforced concrete structures - Preventive maintenance management of existing reinforced concrete structures * Particularly effective when repairs are carried out over a surface area 【Examples of Achievements】 - Ministry of Land, Infrastructure, Transport and Tourism: 1 case - Other government agencies: 10 cases - Other private entities: 181 cases
Detailed information
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Test for confirming rust prevention effects using completely neutralized concrete specimens.
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Comparison with conventional methods
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Company information
Our company was established in 1999 with the purpose of centrally managing the operations related to the underground infrastructure facilities owned by NTT, as well as promoting contributions to society through the enhancement and advancement of social infrastructure in the general market. We aim to protect the NTT Group's "communication services" and fulfill our role in contributing to local communities through the creation of "safe, secure, and comfortable" urban environments.
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