Cementitious Porous Panel Acoustic Fire Partition
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Solution Overview
Problem
Existing insulating systems for partitions, ceilings, and linings that use absorbent materials face issues such as increased weight, complex installation, potential material compression, vibration conduction, and risks of poor installation, which affect acoustic and fire-resisting performance.
Innovation Solution
A multi-layer panel system with an airtight material and a cementitious porous material as the inner layer, having a porosity of 80-95% and a density of 150-450 kg/m³, which eliminates the need for absorbent materials within the cavity, maintaining comparable thickness and weight to traditional systems while providing enhanced insulation and fire-resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If absorbent material is placed inside the cavity, then acoustic insulation is improved, but the system becomes heavier and installation becomes more complex
Solution Approach 1:
The patent uses a porous board with controlled porosity (30-70%) as the core insulating element, replacing traditional absorbent materials. The porous structure provides acoustic insulation through its inherent material properties rather than requiring additional fill materials, thereby reducing overall system weight while maintaining acoustic performance.
Solution Approach 2:
The patent employs composite construction with a porous board core combined with outer cladding layers (such as plasterboard or other finishing materials). This composite structure integrates multiple functions into a single assembly, eliminating the need for separate absorbent material filling and reducing installation complexity.
2Reliability
If absorbent material is placed inside the cavity, then acoustic insulation is improved, but installation time and cost increase
Solution Approach 1:
The patent merges the acoustic insulation function directly into the panel structure itself through the use of porous boards. The insulating function is integrated into the board material and assembly process, eliminating the separate step of filling cavities with absorbent material, thereby significantly reducing installation time and labor costs.
Solution Approach 2:
The porous insulating boards are pre-manufactured with the required acoustic properties and dimensions before site installation. This preliminary preparation of insulating components eliminates on-site material handling and installation steps, reducing both installation time and potential errors.
3Reliability
If absorbent material is used, then acoustic insulation is achieved, but technical devices may compress the material reducing its effectiveness
Solution Approach 1:
The patent employs rigid porous boards with structured, curved, or cellular internal geometries that provide dimensional stability and resistance to compression. The board structure maintains its acoustic properties under load, preventing the density changes that would occur with compressible absorbent materials.
4Reliability
If absorbent material is placed in the cavity, then acoustic insulation is improved, but vibration conduction from technical devices to cladding occurs
Solution Approach 1:
The porous board acts as an intermediary layer between technical devices and the cladding structure. Its porous, damped structure absorbs and dissipates vibrations, preventing direct transmission of mechanical vibrations from devices to the rigid cladding, thereby eliminating the harmful vibration conduction effect.
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 system achieves equivalent insulation performance to traditional systems without absorbent materials, offering improved installation ease, reduced weight, and enhanced fire-resistance with a Weighted Sound Reduction Index and Integrity Insulation value, while minimizing risks associated with fibrous components.
Implementation Method 1
The acoustic behaviour of partitions is well known and usually described by mass spring mass law, where the mass is created by the board cladding and the spring by the air in the cavity. It is also known that the spring effect is dependant to the cavity thickness and the absorbent material inside the cavity.
Implementation Method 2
The fire-resisting behaviour of partitions is well known and usually described by the board cladding and the absorbent material in the cavity. The said board cladding and absorbent materials are usually used to insulate and prevent heat transfer from one side to another side of the partition.
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention concerns an insulating system having a multi layer panel on each side of a frame or on one side of a frame (C), wherein the said panel comprises - at least one airtight material (A); - and at least one cementitious porous material (B) being the most inner layer to cavity, having a porosity from 80 to 95 %, percentage in volume of air voids and water voids, and having a density from 150 to 450 kg / m3.