Abstract
A great number of urban underground concrete water drainage systems in China are facing challenges of corrosion, blockage, and leakage. This could result in engineering accidents such as urban inland inundation, pipeline collapse, leakage, and blockage. The common contributing factors for pipeline leakage and blockage are the porous structures and the perishable surfaces of concrete pipes. To address these issues, we synthesized superhydrophobic coating materials such as SiO2 aerosol, bisphenol A diglycidyl ether (DGEBA), and N-β-aminoethyl-γ-aminopropyltrimethoxysilane (AEAPTS). Our superhydrophobic coating on cement-based surfaces presents good waterproof ability, mechanical stability, and self-cleaning properties. Test results show that the superhydrophobic coating exhibits higher water discharge capacity and survivability to corrosive underground water drainage pipeline environments. Hence, this SiO2 aerosol @ bisphenol A diglycidyl ether coating possesses enormous potential in surface modification of pipeline rehabilitation materials.
Highlights
Many infrastructures in China are in a severely poor condition, making rehabilitation work desperately needed
The deterioration of cement-based materials would be accelerated when water and other chemicals penetrate the pores of the matrix [1]
Most of the water drainage pipes in China have problems with leakage, corrosion, and structural instability, which could result in wasting resources, environmental pollution, and a great loss of social-economic benefit [2,3]
Summary
Many infrastructures in China are in a severely poor condition, making rehabilitation work desperately needed. Most of the water drainage pipes in China have problems with leakage, corrosion, and structural instability, which could result in wasting resources, environmental pollution, and a great loss of social-economic benefit [2,3]. To address these issues, many trenchless methods have been widely used such as cured-in-place pipes, sealers, and coatings [4]. The coating method is getting more and more attention in the field because of its effective construction, economic friendliness, and wide applicability [5] Among those existing coating materials, fiber-reinforced cement mortar and epoxy resin material can together help to provide structural support, controlling the water quality while showing good compatibility with original materials [6,7]. The surface corrosion resistance and discharge capacity of the repairing material are the key elements of the rehabilitation work
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