Biochar-Slag Tile Adhesive Composition for Low-Carbon Adhesion
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Solution Overview
Problem
Existing tile adhesive compositions face challenges in achieving high performance while reducing carbon footprint, particularly when incorporating biochar, which often leads to deterioration of properties such as workability and strength, especially for low water absorption tiles like porcelain.
Innovation Solution
A cementitious tile adhesive composition is formulated using a specific ratio of Portland cement, slag, and biochar, with biochar acting as a lightweight filler, to achieve reduced carbon footprint and maintain or enhance performance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If Portland cement is replaced with secondary cementitious materials (SCM) such as fly ash, slag, silica fume or metakaolin to reduce carbon footprint, then the carbon footprint is reduced, but workability, strength or adhesion deteriorates
Solution Approach 1:
The patent combines multiple supplementary cementitious materials (slag, fly ash, silica fume, metakaolin) with biochar in specific proportions to create a composite adhesive formulation. This composite approach allows the benefits of carbon reduction from SCM replacement while compensating for individual material deficiencies through synergistic interactions, maintaining workability, strength, and adhesion properties
Solution Approach 2:
The patent optimizes the weight ratios of all components including Portland cement, slag, fly ash, silica fume, metakaolin, and biochar. By precisely controlling these compositional parameters, the formulation achieves reduced carbon footprint while preventing deterioration of performance characteristics through balanced material proportions
2Object-generated harmful factors
If the cementitious composition is enriched with biochar to reduce carbon footprint, then the carbon-sinking potential increases, but workability, strength or adhesion deteriorates
Solution Approach 1:
The patent limits biochar content to a specific range (0.5-10 wt.%, preferably 2-8 wt.%, most preferably 3-6 wt.%) and optimizes its ratio to slag (0.16-0.5 to 1). This parameter control ensures sufficient carbon-sinking potential while preventing excessive biochar from negatively impacting workability, strength, and adhesion
Solution Approach 2:
The patent integrates biochar with multiple SCM materials (slag, fly ash, silica fume, metakaolin) in a composite formulation. This composite structure allows the carbon-sinking benefits of biochar to be realized while the complementary properties of different SCMs compensate for any performance deterioration, maintaining overall adhesive reliability
3Reliability
If a tile adhesive composition is formulated for low water absorption tiles (≤ 0.5 %) such as porcelain tiles, then the adhesive meets requirements for these difficult-to-adhere tiles, but the formulation becomes more restrictive with specific selection and combination requirements
Solution Approach 1:
The patent uses a multi-component composite formulation including Portland cement, slag, fly ash, silica fume, metakaolin, and biochar. This composite approach provides multiple mechanisms for achieving adhesion to low water absorption tiles, increasing the likelihood of meeting performance requirements while distributing the complexity across standardized material components
Solution Approach 2:
The patent specifies precise weight ratio ranges for all components to ensure optimal performance on low water absorption tiles. By establishing clear parameter boundaries, the patent simplifies the formulation process within defined limits while ensuring reliable adhesion performance for challenging tile substrates
Data Source
AI summary
The present invention relates to a high-performance tile adhesive composition comprising Portland cement, slag, at least one aggregate and biochar, wherein the weight ratio of biochar to slag is between 0.16 and 0.5 to 1, preferably between 0.16 and 0.3 to 1, most preferably between 0.16 and 0.2 to 1.