Epoxy Primer Bitumen Emulsion Roadway Sealing
Solution Overview
Problem
Existing methods for waterproofing roadways face issues with low temperature of hot-applied materials, insufficient adhesion of plastic granulate to the primer, and stability under high temperatures, leading to inadequate shear and adhesive tensile strengths, especially in critical road sections like downhill areas and expansion joints.
Innovation Solution
The use of epoxy resin as an adhesive primer and application of a bitumen emulsion or bitumen-latex emulsion to plastic granulate, which stabilizes and solidifies the granulate, creating a strong bond with the injection-molded elastomer coating and the road construction layers, and a polyurea spray coating with low water absorption for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional adhesive primer and plastic granulate are used, then the sealing structure is formed, but the adhesion of plastic granulate to the primer is insufficient, leading to granulate shifting during installation
Solution Approach 1:
The patent introduces a bitumen emulsion or bitumen-latex emulsion as an intermediary layer between the plastic granulate and the adhesive primer. This intermediary material enhances the bonding between the granulate and primer, preventing granulate shifting during installation while maintaining the sealing structure's integrity
Solution Approach 2:
The patent modifies the chemical composition and physical properties of the adhesive system by using epoxy resin-based primer combined with bitumen emulsion. This parameter change in the adhesive system's chemistry improves the adhesion strength and granulate stability during the paving process
2Reliability
If the softening temperature of plastic granulate is reduced to improve adhesion, then better bonding with primer is achieved, but the granulate becomes too soft under solar radiation after installation
Solution Approach 1:
The patent creates a composite adhesive system combining epoxy resin primer with bitumen emulsion or bitumen-latex emulsion. This composite material approach allows the system to exhibit both strong adhesion properties and appropriate thermal stability, preventing granulate from becoming too soft under solar radiation while maintaining good bonding
3Ease of operation
If the temperature of hot-applied material is reduced during paving, then easier application is achieved, but the plastic granulate does not melt sufficiently to fuse with the surface
Solution Approach 1:
The bitumen emulsion acts as a mediator that facilitates bonding between the plastic granulate and the hot-applied material at lower temperatures. This intermediary material enables sufficient fusion and melting at reduced temperatures, ensuring proper adhesion without requiring high-temperature application
Solution Approach 2:
The patent changes the chemical composition of the adhesive system to include bitumen emulsion, which has properties that enable effective bonding at lower temperatures. This parameter change in the adhesive chemistry allows granulate to melt and fuse sufficiently with the surface even when hot material application temperature is reduced
4Reliability
If conventional waterproofing materials are used, then basic sealing is achieved, but water absorption increases over time due to pore widening from salt crystallization
Solution Approach 1:
The patent uses a composite sealing system consisting of sprayed elastomer coating, epoxy resin primer, plastic granulate, and bitumen emulsion. This multi-layer composite structure creates a more durable waterproofing barrier that resists pore widening from salt crystallization and maintains lower water absorption capacity over time
Solution Approach 2:
The epoxy resin primer and bitumen emulsion layer serve as a protective cushioning layer between the sprayed elastomer coating and the hot-applied material. This intermediary layer prevents direct contact and potential damage from salt crystallization, cushioning against pore widening and maintaining waterproofing performance
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
This method ensures a permanent, resilient connection and improved adhesion, maintaining required tensile strengths even under high temperatures, and reduces water absorption, extending the waterproofing's service life and protecting against chemical exposure.
Implementation Method 1
The application of the bitumen emulsion or bitumen-latex emulsion leads to the plastic granulate being solidified and stabilized, resulting in a synthetic resin-modified adhesive layer that bonds perfectly with the base, top or wear layer of the road construction
Implementation Method 2
The shear and adhesive tensile strength is achieved primarily by fusing the hot-applied support, top or wear layer with the plastic granules adhering to the seal
Implementation Method 3
A sprayed elastomer coating is sprayed onto this, onto which an adhesive primer is then applied
Data Source
Figure 1
AI summary
In a method for producing a sealing for roadways, for example on bridges for the subsequent application of a base course, top course or wearing course of a road structure, the roadway is primed and if appropriate besprinkled with quartz sand, whereupon a sprayed elastomer coating is sprayed on, an adhesive primer is then applied and this is besprinkled over the whole surface with plastic granules. The adhesive primer used is an epoxy resin. A bitumen emulsion or a bitumen-latex emulsion is applied to the plastic granules.