Inorganic Board with Aggregating Agent Coating
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Solution Overview
Problem
Existing inorganic boards composed of aluminosilicate setting materials and wooden reinforcing materials face issues with high specific gravity and component leaching when exposed to water, making them unsuitable for building boards due to contamination from lignin and other wood components.
Innovation Solution
An inorganic board comprising an aluminosilicate setting material, a wooden reinforcing material, and an aggregating agent, where the wooden reinforcing material is covered by the aggregating agent and then by the aluminosilicate setting material, specifically using polyallylamine as the aggregating agent to suppress component extraction and leaching, with optimal weight percentages for each component to achieve low specific gravity and substantial deflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a wooden reinforcing material is added to lower specific gravity and improve deflection, then the specific gravity decreases and deflection improves, but component extraction and leaching occur when exposed to water
Solution Approach 1:
An aggregating agent is introduced as an intermediary substance that coats the wooden reinforcing material particles. This intermediary layer prevents direct contact between the wood components and water, thereby suppressing extraction and leaching of lignin and other wood components while allowing the wooden material to maintain its function of lowering specific gravity and improving deflection.
Solution Approach 2:
The invention creates a composite material system consisting of three components: wooden reinforcing material particles, aggregating agent, and aluminosilicate setting material. The aggregating agent acts as a binding layer that holds the wooden particles together and prevents their components from leaching into water, while the overall composite maintains the desired low specific gravity and improved deflection properties.
2Ease of manufacture
If a wooden reinforcing material is used instead of synthetic fibers, then the cost decreases and specific gravity is lowered, but colored materials leach into water causing contamination
Solution Approach 1:
The aggregating agent serves as a protective intermediary coating on the wooden reinforcing material particles. This coating prevents water from extracting and leaching colored materials such as lignin from the wood, thereby eliminating contamination issues while maintaining the cost advantage and low specific gravity benefits of using wooden material instead of expensive synthetic fibers.
Solution Approach 2:
The invention changes the chemical and physical parameters of the wooden reinforcing material by coating it with an aggregating agent. This modification alters the surface properties of the wood particles, making them resistant to water extraction and leaching, thereby preventing contamination while preserving the economical and lightweight characteristics of wooden material.
3Object-generated harmful factors
If the aggregating agent content is increased to suppress leaching, then component extraction is suppressed, but the composition may become unstable
Solution Approach 1:
The invention optimizes the quantity parameter of the aggregating agent, specifying it should be 1 to 30 wt% based on the weight of wooden reinforcing material particles. This parameter optimization ensures sufficient coating to suppress leaching and extraction while maintaining stable composition. The aluminosilicate setting material content is also optimized at 30 to 98.95 wt% of total solids to ensure overall composition stability.
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 solution results in an inorganic board with low specific gravity and suppressed component leaching, ensuring the board's suitability for building applications, including outer siding and inner wall boards, while maintaining flexural strength and deflection properties.
Implementation Method 1
the wooden reinforcing material is covered by the aggregating agent... component extraction and leaching from the wooden reinforcing material are suppressed
Data Source
AI summary
An inorganic board is formed of an aluminosilicate setting material, a wooden reinforcing material and an aggregating agent. The wooden reinforcing material is covered by the aggregating agent, and this agent is covered by the aluminosilicate setting material. A method of manufacturing the inorganic board has the steps of covering a wooden reinforcing material with an aggregating agent; producing a starting material mixture by mixing the thus-obtained wooden reinforcing material with an aluminosilicate powder, an alkali metal hydroxide and water glass; and molding and curing the thus-obtained starting material mixture.