Lightened Natural Lime Wall Lining with Mesh Reinforcement
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Solution Overview
Problem
Natural lime, despite its advantages such as non-toxicity, breathability, and fire resistance, is laborious to lay and lacks mechanical strength, leading to issues like prolonged drying times and susceptibility to cracks and weather degradation, especially when used as a wall lining.
Innovation Solution
A construction element comprising a first layer of thin stone or tufa supported by a layer of lightened natural lime, with optional withholding nets or honeycomb aluminium panels, allowing for rapid production and improved mechanical strength, and featuring a sandwich structure for enhanced thermal and acoustic insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If natural lime is used as wall lining material, then breathability and fire resistance are improved, but mechanical strength deteriorates and laying becomes laborious
Solution Approach 1:
The patent uses composite materials by combining natural lime with aggregates (such as granulated cork, natural or artificial fibres like polystyrene) to create lightened lime mixtures. This composite approach maintains the breathability and fire resistance of natural lime while improving mechanical properties through the structural support provided by the aggregate framework.
Solution Approach 2:
The patent introduces mesh reinforcement as an intermediary element between the lime layers. This mesh acts as a mediator that provides mechanical strength and prevents crack formation without compromising the breathability of the natural lime, thus resolving the contradiction between mechanical strength and material permeability.
2Use of energy by stationary object
If lightened lime is used to reduce thermal conductivity, then thermal insulation is improved, but drying time increases and laying becomes more laborious
Solution Approach 1:
The patent employs preliminary action by pre-drying the lime layers in a controlled environment before final installation. This allows the lime to achieve optimal drying without extending the overall construction timeline, as the drying process is initiated and managed in advance under optimal conditions.
Solution Approach 2:
The patent applies parameter changes by modifying the composition and thickness of lime layers to optimize both thermal insulation and drying time. By adjusting the aggregate content, layer thickness, and composition ratios, the patent achieves improved thermal performance while controlling drying duration through optimized material parameters.
3Use of energy by stationary object
If thick layers of natural lime (more than 2 cm) are applied to achieve insulation depth, then thermal insulation is improved, but surface uniformity deteriorates with depressions and protrusions forming
Solution Approach 1:
The patent applies segmentation by dividing thick lime layers into multiple thinner sub-layers, each not exceeding 2 cm in thickness. This segmentation allows each layer to be applied uniformly without forming depressions or protrusions, while the cumulative effect of multiple layers achieves the required thermal insulation depth.
Solution Approach 2:
The patent uses mesh reinforcement as a dimensional stabilizer that spans across the lime layers, providing structural support in the third dimension. This mesh framework prevents surface irregularities by distributing loads evenly, thereby maintaining surface uniformity while allowing thicker overall insulation packages.
4Use of energy by stationary object
If multiple layers (at least 4 layers for 8 cm insulation) are applied to achieve required insulation, then thermal insulation is improved, but laying complexity and time increase
Solution Approach 1:
The patent employs preliminary action by pre-assembling insulation panels with integrated mesh reinforcement and optimized layer configurations. This pre-preparation reduces on-site laying complexity, as the panels can be installed as complete units rather than requiring sequential application and coordination of multiple separate layers.
Solution Approach 2:
The patent uses composite materials by creating integrated panels that combine lime layers, aggregates, and mesh reinforcement into unified construction elements. This composite panel approach simplifies the laying process by reducing the number of separate operations required, while maintaining the required thermal insulation performance through the composite structure.
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 enables rapid production of wall linings with uniform characteristics, improved mechanical strength, reduced drying times, and enhanced thermal and acoustic insulation, while minimizing the drawbacks of natural lime, such as fragility and laborious application, and offering cost and transport advantages.
Implementation Method 1
natural lime has a very poor thermal conductivity of about 0.54 W/mK... lime is used more and more often to produce thermal linings... to reduce the conductivity of the coated walls
Implementation Method 2
enhanced thermal and acoustic insulation
Data Source
Figure 1~2
Figure 3~4
AI summary
Construction element for walls and wall lining comprising at least one layer of lining material (11) and one layer of lightened natural lime (12) attached to the lining material (11) by drying to form a single body.