研究目的
To propose an integrated concrete surface treatment with silicate impregnation and TiO2 spraying for enhanced durability and purification performance.
研究成果
Silicate impregnation and TiO2 spraying improved concrete durability and mechanical performance, with SAS showing better results than COS. TiO2 maintained high purification efficiency for acetaldehyde and methyl orange removal. The integrated treatment is effective for surface enhancement and self-cleaning applications.
研究不足
The study focused on normal strength concrete; other concrete types were not investigated. The TiO2 spraying process may cause additional drying shrinkage, and long-term performance in field applications was not fully assessed.
1：Experimental Design and Method Selection:
The study involved preparing normal strength concrete samples, impregnating them with silicate compounds (SAS and COS), and spraying with TiO2 photocatalyst. Tests were conducted to evaluate silicate properties, durability, and purification performance.
2：Sample Selection and Data Sources:
Concrete samples with a normal strength of 24 MPa were cast and cured for 28 days. Silicate compounds and TiO2 were sourced as specified.
3：List of Experimental Equipment and Materials:
Materials included cement, sand, gravel, SAS, COS, and TiO2 anatase. Equipment included SEM for imaging, and various test apparatus for viscosity, surface tension, pull-off tests, compressive strength, water absorption, drying shrinkage, chloride penetration, freezing/thawing, sulfate resistance, acetaldehyde removal, and methyl orange decolorization.
4：Experimental Procedures and Operational Workflow:
After curing, samples were soaked in silicate for 30-60 s, dried for 30 min, then sprayed with TiO2 for 10-15 s. Tests were performed according to standards like KS A 0531, KS M ISO 4624, etc.
5：Data Analysis Methods:
Data were analyzed based on standard test methods, with results plotted and compared for different treatments.
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