Foamed Cement Composite Fire Barrier
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Solution Overview
Problem
Existing building insulation materials, such as expanded polystyrene (EPS) and extruded polystyrene (XPS), are highly flammable and do not meet the fire resistance requirements for commercial and industrial applications, while intumescent coatings are expensive and have limitations in large-area protection.
Innovation Solution
A non-combustible lightweight cement or gypsum composite is developed, which can be used as exterior or interior panels, coatings, and blocks for building insulation and fire protection. This composite includes a hydraulically settable composition with a stable aqueous foam carrier and additives like calcium sulfoaluminate cement, vermiculite, and perlite, providing improved fire resistance and quick setting properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional insulation materials (EPS, XPS, PU, polyiso) are used, then insulation performance is achieved, but fire resistance is poor and harmful fumes are produced
Solution Approach 1:
The patent uses composite materials by combining gypsum or cement binder with foam agent to create a foamed composite material that provides both insulation and fire resistance. The composite consists of a binder (gypsum/cement) that is inherently fire-resistant and foam that provides insulation, creating a material that achieves both requirements simultaneously.
2Duration of action of stationary object
If gypsum boards are used for fire resistance, then fire rating is achieved, but temperature protection duration is limited after crystallized water is lost
Solution Approach 1:
The patent changes the physical and chemical parameters of the fire barrier material by using foamed composites with controlled density, pore structure, and chemical composition. The foam structure provides additional thermal insulation that maintains temperature protection beyond the point where gypsum loses its crystallized water, extending the fire rating duration.
Solution Approach 2:
The patent creates a composite material combining gypsum or cement with foam, where the foam phase provides additional thermal insulation capacity. This composite structure allows the material to maintain lower temperatures on the unexposed side for extended periods, overcoming the limitation of pure gypsum boards.
3Object-affected harmful factors
If intumescent coatings are used for steel structure protection, then fire resistance is achieved, but cost and application complexity increase significantly
Solution Approach 1:
The patent employs a cost-effective fire barrier material using common construction materials (gypsum or cement) combined with foam agents, which are significantly cheaper than intumescent coatings. The material can be applied as a single-layer coating or panel that provides adequate fire protection without the need for multiple layers or specialized application equipment.
Solution Approach 2:
The foamed composite material serves multiple functions: it provides fire resistance, thermal insulation, and can be applied to various substrates (steel structures, walls, roofs). The material can be applied as a coating, panel, or spray-on insulation, making it universally applicable to different building elements and fire protection needs.
4Object-affected harmful factors
If high solid intumescent coatings are applied in multiple layers, then fire protection is achieved, but overcoating and undercoating problems occur
Solution Approach 1:
The patent uses a foamed composite material that provides adequate fire protection in a single application layer or with minimal layers, avoiding the need for multiple thick coatings. The foam structure provides bulk insulation that achieves fire resistance without requiring precise control of multiple coating layers, eliminating overcoating and undercoating problems.
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 composite achieves equal or better fire resistance than commercially available fire-rated materials, such as Type X gypsum boards and intumescent coatings, while being more cost-effective and suitable for large-area protection, with the added benefit of quick demolding and reduced curing time.
Implementation Method 1
A fire barrier composition that meets both the 325° F. E-119 test limit such as gypsum for walls, roofs, and floors and the high temperature protection requirements per E-119 or UL-1709 test for steel structures could be quite desirable.
Implementation Method 2
hydraulically settable composition with a stable aqueous foam carrier
Implementation Method 3
calcium sulfoaluminate cement, providing improved fire resistance and quick setting properties
Implementation Method 4
additives like calcium sulfoaluminate cement, vermiculite, and perlite, providing improved fire resistance
Implementation Method 5
protect other substrates as a fire barrier coating
Data Source
AI summary
An insulative and lightweight fire barrier composition contains foam or lightweight aggregate and calcium sulfoaluminate cement or their blend with Portland cement or gypsum hemihydrate. The blocks, coatings, and panels made with such compositions are as non-combustible as fiberglass, mineral, and rock wool insulation, yet possess the dimensional stability and rigidity for manufacturing into blocks and panels with good handling and installation features that these fibrous counterparts are lacking. The fire barrier properties of this composition are comparable with or better than cellular glass, cement, gypsum, and intumescent coatings.