Polymer Cement Protection Sheet for Early Concrete Attachment
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Solution Overview
Problem
Conventional concrete repair sheets face issues with adhesive strength differences between substrates and layers, elongation disparities leading to interface separation, and unstable layer qualities due to environmental factors, resulting in prolonged construction periods and uneven protection.
Innovation Solution
A structure protection sheet with a polymer cement cured layer and a resin layer, featuring a controlled water vapor transmission rate of 10 to 50 g/m²/day, allowing moisture emission and adherence to concrete surfaces, even before curing, while providing waterproofness and resistance to salt permeation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional coating methods are used with multiple layers requiring drying time, then coating quality can be achieved, but construction period is prolonged
Solution Approach 1:
The protective layer is applied in advance before concrete curing is complete, allowing the concrete to cure under protection rather than requiring sequential coating after curing. This preliminary application eliminates the need for multiple drying cycles and extends the protective coating application window.
Solution Approach 2:
The coating can be applied continuously without interruption as the concrete cures, rather than requiring sequential application and drying of multiple layers. The protective layer remains applicable throughout the curing process, eliminating idle drying time and extending the productive coating window.
2Ease of manufacture
If coating is performed outside under weather influence, then coating can be applied, but qualities of applied coats become unstable
Solution Approach 1:
The invention changes the timing parameter of coating application from post-curing to during-curing phase. This parameter change allows coating to be applied when concrete is most receptive, ensuring stable coat qualities while maintaining ease of outdoor application. The protective layer is applied during the critical curing phase when concrete is most vulnerable and receptive to protection.
3Strength
If adhesive layers are used to attach protective sheets, then attachment can be achieved, but differences in adhesive strength and elongation cause interface separation
Solution Approach 1:
The protective layer is designed with locally optimized properties including appropriate elongation characteristics and adhesive strength distribution. The layer incorporates local quality variations to accommodate concrete swelling and curing stresses, preventing interface separation while maintaining strong attachment at critical interfaces.
Solution Approach 2:
The protective layer is designed with dynamic characteristics that allow it to adapt to concrete movement during curing. The layer incorporates flexible properties and appropriate elongation to accommodate concrete swelling, preventing rigid interface separation while maintaining attachment strength through dynamic adaptation to substrate movement.
4Productivity
If protective layers are applied before concrete curing, then construction time is reduced, but adhesion may be compromised
Solution Approach 1:
The invention changes the material parameters of the protective layer to be compatible with fresh concrete surfaces. The layer is formulated with appropriate adhesion promoters and physical properties that ensure strong bonding to uncured concrete, enabling early application without compromising adhesion. This parameter optimization allows protective layer application during the curing phase while maintaining bond strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The sheet enables rapid, stable attachment, reduces construction time, prevents swelling, and ensures long-term protection by emitting moisture, maintaining uniformity and stability of protective layers, and enhances adhesion to concrete structures.
Implementation Method 1
a polymer cement cured layer 2 on a side facing a structure 21
Implementation Method 2
the structure protection sheet having a water vapor transmission rate of 10 to 50 g/m2·day
Data Source
AI summary
The present disclosure provides a structure protection sheet comprising a polymer cement cured layer on a side facing a structure; a resin layer on the polymer cement cured layer; and a mesh layer.