Gypsum Building Product with Block-Like Particles
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Solution Overview
Problem
The energy-intensive processes of calcining and drying in traditional gypsum-based building product manufacturing are inefficient, leading to high embodied energy consumption.
Innovation Solution
A method involving the direct mixing of calcium sulphate dihydrate particles with an organic binder to form a self-supporting building product, avoiding calcination and rehydration, resulting in particles with a low aspect ratio and block-like shape, rather than needle-like, and using a binder composition that includes vegetable-derived materials like starch or soy protein.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If calcining and drying processes are used to manufacture gypsum-based building products, then the structural integrity and setting properties are improved, but the energy consumption increases significantly
Solution Approach 1:
The invention changes the particle morphology parameter from needle-shaped (high aspect ratio) to block-like (low aspect ratio) through controlled crystallization. This parameter change allows the gypsum particles to interlock and bond effectively without requiring high-temperature calcining and drying, thus reducing energy consumption while maintaining structural integrity
Solution Approach 2:
The invention uses composite materials by combining block-like calcium sulphate dihydrate particles with organic binders and optional inorganic additives. This composite approach enables the formation of strong building products through the synergistic interaction of components, eliminating the need for energy-intensive thermal processing while achieving reliable structural properties
2Reliability
If needle-shaped gypsum particles are used, then the setting mechanism is well-established, but the aspect ratio is high which may affect processing efficiency
Solution Approach 1:
The invention changes the particle shape parameter from needle-shaped to block-like by controlling the crystallization process to produce particles with low aspect ratio. This parameter change improves processing efficiency through better flow and handling characteristics while the controlled crystallization ensures reliable setting mechanism through proper interparticle bonding
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
This approach reduces energy consumption by eliminating the need for calcining and drying, while maintaining the structural integrity of the building product with a density comparable to conventional plasterboard, and enhancing mechanical properties through the use of inorganic binders.
Implementation Method 1
providing an organic binder for binding the particles of calcium sulphate dihydrate together
Implementation Method 2
allowing the mixture of calcium sulphate dihydrate and binder to cure to provide a building product that is a self-supporting body
Data Source
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AI summary
A building product comprises calcium sulphate dihydrate particles bound by an organic binder. The calcium sulphate dihydrate particles each have a longest dimension and a lateral dimension, wherein the lateral dimension corresponds to the maximum breadth of the particle about the axis defined by the longest dimension. The calcium sulphate dihydrate particles have a low aspect ratio such that for at least 75% of the calcium sulphate dihydrate particles, the value of the lateral dimension is at least 20% of the value of the longest dimension.