Preapplied Waterproofing Bonding Coating for Concrete Adhesion
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Solution Overview
Problem
Existing waterproofing compositions struggle to provide a strong, durable bond between pre-applied membranes and post-cast concrete, especially under conditions of water immersion and UV exposure.
Innovation Solution
A waterproofing bonding coating composition based on an aqueous synthetic polymer emulsion system, featuring film-forming synthetic polymers with average particle sizes ranging from 5 to 150 nanometers, and optionally including surfactants, white pigments, and fillers, which can be applied directly to substrates or membranes to enhance bonding and water resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional waterproofing membranes are used without a bonding coating, then the membrane can be easily installed, but the bond strength with post-cast concrete is insufficient under water immersion and UV exposure
Solution Approach 1:
The patent applies a bonding coating to the membrane surface before concrete is cast, creating a pre-prepared interface that ensures strong adhesion. The coating is applied in advance to the membrane, allowing it to form a protective and bonding layer before the concrete placement, thereby resolving the contradiction between easy installation and bond strength.
Solution Approach 2:
The bonding coating is formulated as a composite material containing polymer emulsion, cementitious materials, and various additives. This composite structure combines the adhesive properties of polymers with the bonding capabilities of cementitious materials, creating a multi-functional layer that provides both strong adhesion and durability under water immersion and UV exposure.
2Strength
If a bonding coating is applied to enhance concrete adhesion, then bond strength improves, but the complexity of the waterproofing system increases
Solution Approach 1:
The bonding coating serves multiple functions simultaneously: it provides adhesion to concrete, protects the membrane from UV radiation, resists water immersion, and facilitates proper concrete placement. By combining these functions into a single coating layer, the patent enhances bond strength without proportionally increasing system complexity.
Solution Approach 2:
The coating formulation includes specific parameter ranges for polymer content (30-70 wt%), cementitious materials (20-50 wt%), and particle sizes (0.1-2.0 mm) that optimize both bonding performance and application simplicity. These controlled parameters ensure consistent performance while maintaining ease of application.
3Ease of manufacture
If the membrane surface is left bare for concrete bonding, then the application process is simple, but UV resistance and water resistance are compromised
Solution Approach 1:
The bonding coating is applied specifically to the surface of the membrane that will contact the concrete, providing localized protection where it is most needed. This targeted approach protects the membrane surface from UV radiation and water immersion at the concrete interface without requiring complete coverage of the entire membrane, thereby maintaining application simplicity while enhancing resistance to harmful factors.
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 coating composition achieves a strong, long-lasting bond with post-cast concrete, providing excellent UV and water resistance, and can be used to convert conventional membranes into pre-applied membranes capable of forming a monolithic waterproofing barrier.
Implementation Method 1
a waterproofing bonding coating composition which is an aqueous synthetic polymer emulsion system comprising: at least one film-forming synthetic polymer
Implementation Method 2
providing excellent UV and water resistance
Implementation Method 3
providing excellent UV and water resistance
Data Source
AI summary
Waterproofing bonding coating compositions comprise synthetic film-forming polymer having very small average particle size within emulsion systems that enable the coating to be used on various substrates, including formwork, conventional as well as pre-applied waterproofing membranes, and even on other coatings, to provide an excellent waterproofing bond with post-cast concrete. Waterproofing bonding coating compositions can be applied in liquid form upon various substrates and building surfaces. They can be used in the manner of a bonding coating layer, or additional bonding coating layer, when applied upon membranes installed at the building site, or, alternatively, when incorporated onto the membrane as an outermost layer at the membrane manufacturing plant. The waterproofing bonding coating can be used to enhance water- and weather-resistance in both conventional and pre-applied waterproofing membranes.