Post-Tensioned Hollow Core Block System for Masonry
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Solution Overview
Problem
Existing construction methods for high-strength masonry structures rely heavily on mortar and complex designs, which are time-consuming, labor-intensive, and require skilled labor, while prior unitized post-tensioning systems lack the necessary strength and simplicity for heavy-duty applications.
Innovation Solution
A SUPER UNITIZED POST TENSION BLOCK SYSTEM using demountably coupled concrete masonry units with hollow cores, high-strength fastener bolts, and durable plates that can be assembled with simple tools, eliminating the need for mortar and water, and providing adjustable corrosion-resistant components for enhanced strength and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional mortar and complex designs are used for high-strength masonry structures, then structural strength is achieved, but construction time and labor requirements increase significantly
Solution Approach 1:
The system divides the structure into modular concrete masonry units with integrated hollow cores that can be independently manufactured and then assembled. Each block is a self-contained segment with built-in reinforcement channels, eliminating the need for time-consuming on-site mortar application and complex assembly procedures while maintaining high structural strength through the modular design.
Solution Approach 2:
The reinforcement bars and hollow core structures are pre-formed and integrated into the concrete masonry units during manufacturing. The post-tensioning cables are pre-positioned within the hollow cores, allowing the blocks to be ready for immediate assembly and tensioning without requiring time-consuming on-site preparation, thereby reducing overall construction time while ensuring structural integrity.
2Strength
If traditional mortar and complex designs are used for high-strength masonry structures, then structural strength is achieved, but labor intensity and skill requirements increase
Solution Approach 1:
By segmenting the structure into standardized modular blocks with integrated reinforcement, the system reduces labor intensity. Workers only need to assemble pre-fabricated units using simple connection mechanisms rather than performing complex mortar application and reinforcement installation tasks, making the construction process easier while maintaining structural strength through the engineered modular design.
Solution Approach 2:
The concrete masonry units are designed to be self-reinforcing with integrated hollow cores and built-in tensioning capabilities. The blocks inherently provide their own structural reinforcement without requiring external mortar or complex assembly procedures, reducing labor intensity and skill requirements while maintaining high structural strength through the self-contained design.
3Productivity
If unitized post-tensioning systems are used, then construction speed improves, but structural strength is insufficient for heavy-duty applications
Solution Approach 1:
The system combines concrete masonry units with integrated steel reinforcement bars and post-tensioning cables to create a composite structure. The concrete blocks provide compressive strength while the steel reinforcement and tensioning cables provide tensile strength, creating a composite material system that achieves both high construction speed through modular assembly and sufficient structural strength for heavy-duty applications.
Solution Approach 2:
The post-tensioning cables and reinforcement bars are pre-positioned within the hollow cores during block manufacturing. This preliminary action allows the blocks to be pre-strengthened before assembly, enabling rapid construction while ensuring that the structural strength is sufficient for heavy-duty applications through the pre-engineered reinforcement configuration.
4Ease of operation
If simple tools are used for assembly, then ease of operation improves, but the complexity of the system increases
Solution Approach 1:
The system segments the complex structural requirements into simple, standardized block components with integrated features. Each block is a discrete segment with built-in hollow cores and reinforcement channels, allowing assembly using simple tools while the overall system achieves complex structural capabilities through the combination of many standardized segments.
Solution Approach 2:
The concrete masonry units are designed as universal components that perform multiple functions: structural support, reinforcement containment, and tensioning integration. The hollow cores serve both as structural features and as channels for reinforcement bars and cables. This multi-functionality reduces system complexity by eliminating the need for separate components for each function, allowing simple assembly tools while achieving complex structural goals.
Data Source
AI summary
An improved, high strength construction system that uses post tensioning. It is comprised of a series of interconnected, super heavy duty hollow core blocks 102 with minimal ducts 103, a series of tendons 105, and a plurality of anchors or plates 104 with additional features. The system 101 is configured with the plurality of adjacent blocks 102 contiguous and touching one another and demountably coupled to each other by means of the tendons 105 and anchors 103. The unique features include a strong, durable full plate 104 and bolt 105 both of which may be treated for corrosion resistance. This new coupling results in a structure that is far stronger than an ordinary block structure built with mortar and standard reinforcing. The SYSTEM has more predictable and controlled strength which is stronger than most reinforced concrete systems.