Concrete Pavement Face Layer Mixing for Stone-Like Surface Texture
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Solution Overview
Problem
Existing methods for producing concrete blocks with special surface finishes are time-consuming and costly, requiring specialized equipment and treatment steps to achieve desired visual and tactile effects.
Innovation Solution
A method for producing concrete flooring elements using a paving stone machine, where a core concrete layer is compacted, followed by a facing concrete layer composed of two distinct facing concrete mixes - dense and porous - which are partially blended and distributed to create a multi-layered, textured surface, mimicking natural stone appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If concrete is poured into molds and tamped using conventional methods, then the pavement elements can be manufactured, but the concrete contains air voids and inhomogeneous distribution of aggregates leading to reduced quality
Solution Approach 1:
The patent applies mechanical vibration through a tamping rod connected to a vibratory motor. The vibratory motor generates oscillations that are transmitted through the tamping rod to the concrete in the mold. This vibration consolidates the concrete, eliminates air voids, and ensures homogeneous distribution of aggregates, thereby improving manufacturing precision without requiring complex manual tamping processes
Solution Approach 2:
The patent replaces manual mechanical tamping with an automated vibratory mechanism. The vibratory motor automatically generates the necessary oscillations to consolidate the concrete, substituting the need for complex manual tamping operations with a simple automated vibration system that achieves better consolidation results
2Reliability
If conventional tamping methods are used, then the manufacturing process is simple, but the air voids in the concrete reduce the durability and quality of pavement elements
Solution Approach 1:
The vibratory motor-driven tamping rod applies mechanical vibration to the concrete during pouring and consolidation. This vibration eliminates air voids and ensures proper consolidation of the concrete mixture, significantly improving the durability and reliability of the pavement elements. The process maintains manufacturing efficiency by integrating the vibration mechanism into the existing pouring operation
Solution Approach 2:
The patent changes the physical state and consolidation parameters of the concrete by applying vibration. The vibratory motion alters the arrangement of particles and air voids in the concrete, transforming it from a loose, void-containing mixture to a densely consolidated structure with improved durability properties
3Manufacturing precision
If aggregates are not pre-sorted by size, then the manufacturing process is faster, but the concrete has poor homogeneity and quality
Solution Approach 1:
The patent implements preliminary action by pre-sorting aggregates into different size fractions (first, second, and third fractions with specific size ranges) before the concrete pouring operation. This pre-preparation ensures that when the concrete is mixed and poured, the aggregates are already optimally distributed by size, leading to homogeneous concrete structure without requiring additional time during the actual manufacturing process
Solution Approach 2:
The patent segments the aggregate material into distinct size fractions (13-19mm, 9-12mm, and 4-8mm ranges). This segmentation allows each fraction to be separately controlled and distributed in the concrete mixture, ensuring uniform distribution and optimal packing of aggregates throughout the pavement element, thereby improving homogeneity
4Strength
If steel fibers are added to concrete for reinforcement, then the strength improves, but the mixing and pouring process becomes more complex
Solution Approach 1:
The patent merges the steel fiber reinforcement with the aggregate mixture in a combined mix. The steel fibers are integrated into the concrete mixture along with the sorted aggregates, creating a unified composite material that provides both structural reinforcement and aggregate stability. This merging approach strengthens the concrete without requiring separate mixing processes for fibers and aggregates
Solution Approach 2:
The steel fibers serve multiple functions in the concrete mixture: they provide reinforcement, improve tensile strength, and enhance the overall structural integrity of the pavement element. By incorporating steel fibers that perform multiple functions, the patent achieves improved strength without requiring additional complex processing steps
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
Enables rapid, automated, and flexible production of concrete blocks with unique surface textures and appearances, reducing production time and costs while achieving a natural stone-like finish.
Implementation Method 1
a) pouring the concrete mixture into the molds, wherein the concrete mixture is tamped with a vibratory motor-driven tamping rod
Data Source
Figure 1~2b
Figure 3~5
AI summary
The invention relates to a method for manufacturing pavement elements (1) made of concrete, more particularly for manufacturing concrete paving stones or concrete slabs by means of a paving stone machine (20). The pavement elements (1) are produced as multi-layer pavement elements (1) and have at least one core concrete layer (2) manufactured from a core concrete and at least one face concrete layer (3) manufactured from a face concrete. In the method, the core concrete is introduced into at least one mold (4) and compressed. Subsequently the face concrete is additionally introduced onto the compressed core concrete and is likewise compressed, and the core concrete and the face concrete are cured. According to a particular aspect of the method, for the manufacture of the face concrete layer (3) at least one first face concrete mixture (3.1) and at least one second face concrete mixture (3.2) are prepared and provided, and the face concrete used for the additional introduction onto the compressed core concrete comprises at least a proportion of the first first face concrete mixture (3.1) and at least a proportion of the second face concrete mixture (3.2), the first face concrete mixture (3.1) being an impervious concrete and the second face concrete mixture (3.2) being a pervious concrete.