Deck-Slab Waterproofing Brush With Metal Bristles
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Solution Overview
Problem
Existing methods for applying a waterproofing membrane to highway-bridge deck slabs are inefficient and unsafe due to the difficulty in achieving uniform application, frequent tool replacement, and structural complexities in existing apparatuses, which hinder effective and safe application of molten asphalt.
Innovation Solution
A deck-slab waterproofing-membrane application brush with metallic bristles aligned in a furrowed metal plate, towed by a hand truck equipped with a liquefying kettle and propane heating, allowing for uniform and efficient application of the membrane, monitored via a camera and video display for quality control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rubber rakes and brushes are used to apply molten asphalt, then manual operation is simple, but the material clings to the tool and hardens requiring frequent replacement
Solution Approach 1:
The patent employs a metal brush with bristles that are designed to withstand high temperatures and can be easily replaced. The brush is constructed with a metal plate and metal bristles that resist asphalt adhesion and thermal damage, allowing for continuous use without frequent replacement unlike rubber tools.
Solution Approach 2:
The patent changes the material parameter from rubber to metal, which fundamentally alters the thermal and chemical properties. Metal bristles have higher heat resistance and lower surface adhesion to molten asphalt, enabling continuous operation at temperatures where rubber would degrade and asphalt would harden on the tool.
2Ease of operation
If rubber brushes are used to apply waterproofing membrane, then the tool is flexible and easy to handle, but uniform application on rough deck-slab surfaces is not achieved
Solution Approach 1:
The metal brush is designed with rigid metal bristles that maintain their shape and spacing under high temperature conditions, providing consistent spacing for uniform asphalt application. The metal construction prevents deformation that would occur with rubber at these temperatures.
Solution Approach 2:
The brush combines a metal plate base with metal bristles, creating a composite tool that provides both structural stability for handling flexibility and thermal resistance for uniform application at high temperatures. The metal components work together to maintain geometric integrity during operation.
3Quantity of substance
If large-sized asphalt mixing equipment is used, then sufficient asphalt can be supplied, but small-scale mending work becomes challenging from cost and transport perspectives
Solution Approach 1:
The patent divides the asphalt supply system into modular components: a portable propane gas heater that can be transported separately, a metal bucket for holding asphalt, and the application brush. This segmentation allows the system to be scaled down for small repairs while maintaining adequate asphalt supply capability through the portable heating unit.
Solution Approach 2:
The system transitions from fixed large-scale equipment to a dynamic portable system where the propane heater can be positioned and adjusted as needed. The metal bucket can be manually carried and repositioned, allowing the equipment to adapt to various work scales and locations.
4Productivity
If complex apparatus structures are used for asphalt pouring, then automated pumping and pouring can be achieved, but the structure becomes complex requiring more maintenance
Solution Approach 1:
The patent extracts the heating function from a complex integrated system and implements it as a separate, simple propane gas heater. This eliminates the need for complex power transmission devices, gear pumps, and control systems while maintaining the core function of heating and pouring asphalt.
Solution Approach 2:
The propane gas heater is a self-contained unit that requires no external power source, complex controls, or maintenance infrastructure. It automatically regulates its own operation through simple thermal feedback, eliminating the need for engines, electrical systems, and associated maintenance requirements.
5Device complexity
If manual conveyance of molten asphalt is used, then equipment is simple, but the application process is slow and labor-intensive
Solution Approach 1:
The patent implements continuous heating of asphalt through the portable propane heater, ensuring the material remains in a fluid state throughout the application process. This eliminates interruptions for reheating and allows continuous pouring and application, significantly increasing productivity while keeping equipment simple.
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 continuous, safe, and efficient application of waterproofing membranes over large areas with reduced labor and risk of burns, while maintaining warmth and ensuring uniform coverage.
Implementation Method 1
a heating means (propane gas canister) P, likewise carried on board the hand truck 20, and, with propane gas being its fuel supply source, for heating the liquefying kettle 31
Implementation Method 2
inside a furrow in a furrowed metal plate, numerous metallic bristles are aligned into rows in a packed, sheet-like form and fastened in a state in which the numerous metallic bristles are clamped
Data Source
AI summary
A deck-slab waterproofing-membrane application brush for coating highway-bridge deck slabs with a waterproofing membrane, and a deck-slab waterproofing-membrane application apparatus for towing the brush to spread on waterproofing product are made available to enable the applying of deck-slab waterproofing membranes uniformly, safely, and efficiently to highway bridges. The deck-slab waterproofing-membrane application brush, for spreading on highway-bridge deck-slab waterproofing product, is characterized in that inside a furrow in a furrowed metal plate, numerous metallic bristles are aligned into rows in a packed, sheet-like form and fastened in a state in which the numerous metallic bristles are clamped.