一种盾构隧道管片用耐腐蚀混凝土及其制备方法
By introducing layered bimetallic hydroxide-aluminum silicate nanosheet composite and phosphate-intercalated modified strontium molybdate slow-release rust inhibitor into the concrete of shield tunnel segments, a multi-layered protection system was constructed, which solved the corrosion problem of shield tunnel segments in complex environments and achieved high efficiency, durability and ease of construction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG NEW BENDA BUILDING MATERIALS IND CO LTD
- Filing Date
- 2026-01-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing shield tunnel segment concrete is difficult to effectively resist chloride ion penetration, sulfate erosion and carbonation in complex underground or underwater environments, resulting in structural performance degradation and shortened service life. Traditional protective measures have problems such as high construction difficulty, easy damage and poor long-term effectiveness.
A multi-layered synergistic protection system was constructed by combining a layered bimetallic hydroxide-alumina silicate nanosheet composite and a phosphate-intercalated modified strontium molybdate slow-release rust inhibitor with a sulfoaluminate cement-based cementitious system. The nanosheet composite adsorbs and fixes harmful ions, while the rust inhibitor intelligently releases and protects the steel bars, forming a dense physical and chemical protective layer.
It significantly improves the corrosion resistance of concrete, extends the corrosion initiation threshold of steel bars, enhances impermeability and sulfate attack resistance, ensures long-term durability and ease of construction, and is suitable for the century-long durability requirements of shield tunnel segments.
Smart Images
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