Cement-Based Tile Composition Reducing Weight and Installation Complexity
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Solution Overview
Problem
Cement-based tiles, particularly roofing tiles, are heavy and require special installation due to their weight and structural demands, necessitating increased support and specific fastening methods, which complicates the installation process.
Innovation Solution
A cement-based tile composition comprising cement, secondary materials, reinforcement fibers, and a rheology modifying agent, allowing for the creation of a clay-like consistency that can be extruded or molded, reducing weight and installation complexity by enabling the use of conventional clay production methods and eliminating the need for pre-drilled holes or special fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If cement-based tiles are made with traditional concrete mixtures (6-10% water, zero-slump material), then the tiles achieve sufficient structural strength, but the tiles become heavy requiring special installation equipment and increased structural support
Solution Approach 1:
The patent changes the water content parameter from traditional 6-10% to 15-25%, and introduces a rheology modifying agent to alter the material's flow properties. This allows the mixture to achieve clay-like consistency for easy extrusion while maintaining adequate strength after curing, resolving the contradiction between workability and structural integrity
Solution Approach 2:
The patent creates a composite material system combining cement, secondary materials (sand, limestone, fly ash), and rheology modifying agents. This composite approach allows the mixture to exhibit both plasticity during processing and strength after curing, eliminating the need for heavy traditional concrete formulations
2Productivity
If cement-based tiles are produced using traditional extrusion methods with zero-slump material, then continuous production is achieved, but the material requires high compression forces and specialized equipment
Solution Approach 1:
The patent modifies the mixture parameters by increasing water content to 15-25% and adding rheology modifying agents, transforming the material from zero-slump concrete to a clay-like extrudable substance. This allows the use of simple clay extrusion equipment instead of complex high-compression concrete extrusion systems
Solution Approach 2:
The patent replaces the need for high-compression mechanical extrusion systems with a lower-compression system that utilizes the natural plasticity of the modified cement mixture. The rheology modifying agent enables the material to flow and form under reduced pressure, simplifying the mechanical equipment requirements
3Reliability
If cement-based tiles are made heavy to ensure durability, then the tiles gain increased structural support, but the installation process becomes more complex requiring pre-drilled holes and special fasteners
Solution Approach 1:
The patent optimizes the water content to 15-25% and incorporates reinforcement fibers to achieve a balance where the tiles have sufficient strength for durability but reduced weight for easy installation. The fibers provide structural integrity while the modified mixture enables conventional installation methods
Solution Approach 2:
The patent uses a composite formulation with cement, secondary materials, and reinforcement fibers that provides both durability and ease of installation. The composite structure delivers the necessary strength without requiring excessive weight, allowing standard fastening methods to be effective
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 resulting cement-based tiles are lighter, more ductile, and durable, with improved mechanical properties, allowing for easier and cost-effective installation using traditional equipment and methods, while maintaining high compressive and flexural strengths.
Implementation Method 1
a rheology modifying agent in the range of about 0.5 to 10% by wet weight percent; and wherein the mixture is extruded or molded to form the cement-based tile
Data Source
AI summary
A cement-based tile formed from a mixture comprising: a cement in the range of about 0.1 to 88% by wet weight percent; a secondary material in the range of about 0.1 to 50% by wet weight percent, the secondary material comprising limestone, sand, silica sand, gypsum, silica fume, fumed silica, Plaster of Paris, calcium carbonate, fly ash, slag, rock, or a combination thereof; a reinforcement fiber in the range of about 0.5 to 20% by wet weight percent, the reinforcement fiber comprising cellulose fiber, glass fiber, plastic fiber, polypropylene fiber, polyvinyl alcohol (PVA) fiber, homopolymer acrylic fiber, alkali-resistant fiber, or a combination thereof; a rheology modifying agent in the range of about 0.5 to 10% by wet weight percent; a water in the range of 10 to 60% of a total wet material weight; and wherein the mixture is extruded or molded to form the cement-based tile.