Hexagonal Concrete Slab Framing System for Curl Control
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Solution Overview
Problem
Concrete slab panels tend to curl during the curing process due to differential shrinkage, leading to stress and cracks, which is costly to address with traditional methods such as saw-cut joints and reinforcement with steel rebar.
Innovation Solution
A method and device that subdivides a continuous concrete slab into hexagonal panels using mounting frames and posts, eliminating the need for saw-cut joints and steel reinforcement by inducing cracks and acting as joint fillers, thereby reducing curling and stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional saw-cut joints and steel reinforcement are used to address curling, then crack control and structural integrity are improved, but construction cost increases
Solution Approach 1:
The continuous concrete slab is divided into multiple hexagonal panels using mounting frames and posts. This segmentation creates controlled joints that accommodate differential shrinkage and curling, preventing random cracking while eliminating the need for expensive saw-cut joints and steel reinforcement.
Solution Approach 2:
The mounting frames and posts are installed before concrete pouring to pre-establish the joint locations and panel boundaries. This preliminary action ensures that cracks occur at predetermined locations along the frame edges rather than randomly, achieving crack control without additional cost.
2Shape
If saw-cut joints are made to control crack propagation, then aesthetic appearance is improved, but manufacturing complexity increases
Solution Approach 1:
The mounting frames are installed before concrete pouring to pre-establish joint locations. This eliminates the need for post-pouring saw-cut operations, as the frames themselves create the joint lines that guide crack propagation along aesthetically pleasing hexagonal patterns.
Solution Approach 2:
The saw-cut operation is extracted from the construction process entirely. Instead of cutting joints after concrete hardening, the mounting frames create the joints during pouring, eliminating the complex saw-cutting equipment and operations while maintaining aesthetic crack patterns.
3Strength
If steel rebar is added to reinforce the slab, then structural strength is improved, but construction cost and device complexity increase
Solution Approach 1:
The slab is segmented into smaller hexagonal panels that are less prone to curling and cracking. This segmentation inherently reduces the tensile stresses that would require steel reinforcement, allowing the use of unreinforced or minimally reinforced concrete while maintaining structural integrity.
Solution Approach 2:
The mounting frames, which create joints that might be considered weaknesses, actually become the strength mechanism by controlling where cracks occur. The frames convert the potential harm of uncontrolled cracking into the benefit of predictable, aesthetically pleasing crack patterns along the frame edges.
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 method significantly reduces curling and stress in concrete slabs, allowing for even curing and minimizing the need for reinforcement, resulting in cost-effective and aesthetically pleasing concrete slabs with reduced maintenance.
Implementation Method 1
Differential shrinkage is the basic cause of curling. This occurs as the exposed top surface of the slab shrinks and the core of the slab does not.
Data Source
AI summary
A device for forming, reinforcing, joint sealing and edge protecting of a concrete slab panel, wherein the concrete slab panel having a volume, a length, a width, and a surface. The device comprising of an elongated post having a body, a top end and a bottom end with a plurality of elongated grooves extending along the body; a mounting frame has a length, a width and a thickness. The mounting frames having a connecting means to connect the mounting frame to the posts. The present invention eliminates the needs for saw-cut lines for crack inducement and acts as a joint sealer for the concrete slab to relieve the tensile stresses.