Multi-layered Concrete Block with Interlocking Underside
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Solution Overview
Problem
Existing concrete blocks for surface coverings are inadequate in withstanding high mechanical loads, particularly on traffic areas for heavy goods traffic, as they often experience displacement due to dynamic forces, leading to unsightly appearance and potential damage.
Innovation Solution
A concrete block design featuring a multi-layered structure with a coarse, porous concrete layer on the underside for interlocking with the bedding layer, providing a large number of toothing elements to secure the block against shifting and slipping, and a structurally dense facing concrete layer on top for durability and optical design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional concrete blocks are used for surface coverings, then they are easy to manufacture and lay, but they experience displacement under high mechanical loads from heavy goods traffic
Solution Approach 1:
The concrete block is divided into multiple functional layers: a core concrete layer providing structural strength, a coarse aggregate layer on the underside providing anti-displacement through interlocking with bedding material, and a facing layer providing surface durability and aesthetics. This segmentation allows each layer to optimize its specific function while maintaining overall manufacturability.
Solution Approach 2:
The patent employs composite material construction by combining different concrete layers with distinct properties. The core layer uses standard concrete mix for strength, while the underside layer incorporates coarse aggregate for mechanical interlocking. This composite approach enhances reliability under load while remaining within conventional manufacturing capabilities.
2Reliability
If anti-displacement devices are inserted below the surface covering before laying concrete blocks, then displacement is prevented, but the installation process becomes more complex and time-consuming
Solution Approach 1:
The anti-displacement function is merged directly into the concrete block structure itself through the coarse aggregate layer on the underside. This eliminates the need for separate anti-displacement devices inserted below the surface covering, as the block's own structure provides the interlocking mechanism with the bedding layer, thereby reducing installation complexity while maintaining reliability.
Solution Approach 2:
The concrete block is designed to provide its own anti-displacement protection through the coarse aggregate layer that interlocks with the bedding material. This self-service approach eliminates the need for external anti-displacement devices and simplifies the installation process while ensuring stable performance under mechanical loads.
3Reliability
If concrete blocks are shaped with projections on the underside to prevent displacement, then anti-displacement protection is provided, but the design only works at specific points and not in all lateral directions
Solution Approach 1:
The coarse aggregate layer on the underside provides localized interlocking elements distributed across the entire bottom surface. This local quality approach ensures that anti-displacement protection is provided at multiple points throughout the contact area, creating comprehensive resistance to displacement in all lateral directions rather than at specific isolated points.
Data Source
Figure 1~2
Figure 3~4
Figure 5A~5B
AI summary
A concrete block (1) in the form of a paving element that can be laid in a bonded configuration for creating a surface covering is described. The concrete block (1) has at least one multi-layered concrete block body (2) with at least one underside (2.1) suitable for laying on a bedding layer (3) of a substrate and an opposing upper surface (2.2), wherein the multi-layered concrete block body (2) comprises at least one first concrete block layer (4) designed as a core concrete layer and at least one second concrete block layer (5) arranged on the underside (2.1). The concrete block is characterized in particular by the fact that the second concrete block layer (5) is a coarse, porous concrete layer and is made of concrete with a coarse aggregate. The second concrete block layer (5) is designed as an interlocking layer for interlocking with the bedding layer (3) of the substrate.The concrete block (1) is thus equipped with a coarse-grained surface (5a) on the underside (2.1) of the concrete block.