Scrub Sealer Composition for On-Site Road Crack Treatment
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Solution Overview
Problem
Conventional slurry seals for treating road cracks are complex, time-consuming, expensive, and difficult to implement on-site, leading to settling of solids and non-repeatable applications due to high temperatures and multi-stage mixing processes.
Innovation Solution
A method of preparing a scrub sealer using an asphalt emulsion and a premixture of aggregates, mixed on-site using a mixer, and applied using a scrub box with angled brushes to distribute and penetrate into cracks, allowing for efficient and cost-effective crack treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional slurry seal is used to treat road cracks, then the road surface can be sealed, but the seal oxidizes and becomes inelastic, causing it to crack and unravel
Solution Approach 1:
The patent changes the chemical composition parameters of the seal by incorporating rubberized asphalt binder and elastic polymers, transforming the material from a rigid, oxidation-prone composition to a flexible, elastic composition that maintains its properties under temperature variations
Solution Approach 2:
The patent creates a composite material by combining rubberized asphalt binder with elastic polymers and aggregates, producing a seal that leverages the elasticity of rubber and polymers to prevent cracking while maintaining sealing effectiveness
2Manufacturing precision
If a multi-stage mixing process is used to prepare the slurry seal, then the seal composition can be controlled, but the process becomes complex, time-consuming, and expensive
Solution Approach 1:
The patent merges multiple mixing stages into a single-stage process by pre-formulating the rubberized asphalt binder with all necessary components (asphalt, crumb rubber, elastic polymers, surfactants) before final mixing with aggregates, simplifying the overall process while maintaining composition control
Solution Approach 2:
The patent performs preliminary preparation of the rubberized asphalt binder composition before the final mixing stage, ensuring all chemical components are pre-combined and ready for straightforward mixing with aggregates, reducing on-site process complexity
3Manufacturing precision
If high temperatures are used in the mixing process, then the seal components can be properly combined, but the process becomes difficult to implement on-site and causes settling of solids
Solution Approach 1:
The patent changes the temperature parameter from high-temperature processing to ambient or moderate temperature mixing by using emulsion-based formulations that do not require thermal activation, enabling on-site application and preventing solid settling
Solution Approach 2:
The patent replaces thermal processing mechanisms with mechanical mixing at lower temperatures, using high-shear mixers to achieve proper component combination without relying on heat, thereby enabling immediate on-site application
4Loss of time
If the slurry seal is stored before application, then preparation can be done in advance, but solids settle out of the emulsion requiring expensive cleanup
Solution Approach 1:
The patent employs self-cleaning mechanisms through the use of surfactants and proper aggregate grading that prevent solid settling during storage, eliminating the need for expensive cleanup operations and ensuring consistent application quality
Solution Approach 2:
The patent modifies the rheological parameters of the emulsion through surfactant selection and concentration optimization, creating a formulation that remains stable and prevents settling during storage while allowing immediate application
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 scrub sealer provides a simple, robust solution for sealing road cracks with minimal settling and quick application, ensuring deep penetration and a smooth, level surface finish.
Implementation Method 1
Asphalt, also known as bitumen, is a binder used to adhere filler or reinforcement (e.g., sand, aggregate, etc.) together and to the underlying surface
Implementation Method 2
passing the asphalt emulsion and the premixture through a mixer to form the scrub sealer
Implementation Method 3
applied using a scrub box with angled brushes to distribute and penetrate into cracks
Data Source
AI summary
This disclosure relates to a method of preparing a scrub sealer. The method includes preparing an asphalt emulsion, and preparing a premixture of at least two different types of aggregate. The method also includes passing the asphalt emulsion and the premixture through a mixer to form the scrub sealer.