Bio-based Membrane for Concrete Curing via Parameter Changes
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Solution Overview
Problem
Existing membrane solutions for concrete and cement are non-bio-compatible, difficult to apply, and environmentally unfriendly, often requiring water for curing, which can lead to surface cracking and inadequate protection against environmental degradation.
Innovation Solution
An aqueous, bio-compatible composition forming a flexible, impermeable membrane using biodegradable polymers and platelet nanoparticles, which can be applied directly to surfaces to prevent water loss and environmental damage without penetrating the concrete, thus controlling setting and providing long-term protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If plastic or chemical compound membranes are used to seal concrete, then water evaporation is retarded and concrete is protected, but toxic chemicals and solvents may be used and they are non-bio-compatible
Solution Approach 1:
The patent changes the chemical composition parameters of the membrane from conventional plastic/chemical compounds to a bio-based composition comprising cellulose (30-70 wt%), starch (10-40 wt%), and biodegradable polymer (5-20 wt%). This parameter change eliminates toxic chemicals and solvents while maintaining the membrane's protective function against water loss and environmental degradation.
Solution Approach 2:
The patent uses a composite material system combining multiple natural and biodegradable components (cellulose, starch, biodegradable polymer, and optional additives) to create a membrane that provides effective protection without the harmful properties of conventional single-material plastic membranes. The composite structure allows synergistic effects that enhance protection while ensuring bio-compatibility.
2Object-affected harmful factors
If conventional membranes are applied to concrete, then they provide sealing, but they are difficult to apply especially on curved surfaces and in hidden areas
Solution Approach 1:
The patent changes the physical state and rheological parameters of the membrane material from rigid plastic sheets to a liquid or semi-liquid slurry composition. This parameter change allows the composition to flow and conform to any surface geometry, making application to curved surfaces and hidden areas easy through spraying, brushing, or pouring methods.
Solution Approach 2:
The patent utilizes hydraulic principles by applying the membrane as a liquid slurry that can be sprayed or poured onto the concrete surface. This liquid state allows the material to flow into hidden areas and conform to curved surfaces under gravity and spray pressure, eliminating the application difficulties associated with rigid sheets.
3Object-affected harmful factors
If sheets are used to cover concrete, then they provide temporary protection, but they do not fully cover concrete and may be removed after use
Solution Approach 1:
The patent incorporates additives such as adhesion promoters and crosslinking agents that enable the membrane to bond chemically and physically with the concrete substrate. This self-service mechanism allows the membrane to permanently integrate with the concrete surface, providing long-term protection without requiring removal or replacement.
Solution Approach 2:
The patent uses a composite material system that includes concrete-reactive components and adhesion promoters, creating a multi-functional coating that both protects the concrete and integrates with it. The composite structure ensures permanent bonding and long-term durability, eliminating the temporary nature of conventional removable sheets.
4Strength
If concrete is kept sealed during initial curing, then strength is achieved, but it requires continuous monitoring and maintenance of sealing
Solution Approach 1:
The patent applies the membrane composition to the concrete surface immediately after pouring or during the early curing stage. This preliminary action establishes the sealing barrier before critical water loss occurs, eliminating the need for continuous monitoring and maintenance of separate curing measures throughout the curing period.
Solution Approach 2:
The patent creates a continuous, intact membrane layer that provides uninterrupted sealing protection throughout the concrete curing process. This continuous protective barrier maintains consistent moisture levels without requiring periodic intervention, monitoring, or maintenance, allowing the concrete to cure continuously and effectively.
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 membrane effectively prevents surface cracking and environmental damage, reduces water usage, and maintains the integrity of the concrete while being environmentally friendly and easy to apply, even on complex surfaces.
Implementation Method 1
The polymer is capable of forming a gel, once being in contact with polyvalent cations, thereby forming a flexible, impermeable membrane
Implementation Method 2
a (semi)permeable membrane relates to a partially permeable membrane or a differentially permeable membrane. Such a membrane allows certain molecules or ions to pass through it by diffusion
Data Source
Figure 1~2b
AI summary
The present invention is in the field of a composition for forming a bio-compatible membrane applicable to building material, such as concrete, cement, etc., to a meth od of applying said composition for forming a bio-compatible membrane, a biocompatible membrane, use of said membrane for various purposes, and to building material comprising said membrane.