Amorphous Cellulose Modified Asphalt Composition
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Solution Overview
Problem
Asphalt pavements deteriorate over time, leading to issues like rutting and fatigue cracking, which existing technologies have not adequately addressed in terms of reducing environmental impact and improving durability.
Innovation Solution
An asphalt composition containing 0.01 to 10 parts by mass of amorphous cellulose per 100 parts of asphalt, with a crystallization index of 50% or less, is used to inhibit rutting and fatigue cracking, improving mechanical strength and viscoelasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional asphalt is used for pavement construction, then construction is easy and traffic can start quickly, but the pavement deteriorates over time resulting in rutting and cracking
Solution Approach 1:
The patent applies composite materials by combining asphalt with amorphous cellulose (crystallization index ≤50%) to create a modified asphalt composition. This composite structure leverages the binding properties of asphalt and the reinforcement properties of cellulose fibers, achieving both ease of construction and improved durability against rutting and cracking while maintaining environmental sustainability
2Object-affected harmful factors
If plant fiber bodies like kenaf fiber are added to asphalt, then environmental load is reduced and rutting is inhibited, but the composition complexity increases
Solution Approach 1:
The patent applies parameter changes by specifying precise control parameters for the cellulose: crystallization index ≤50%, content of 0.01-10 parts by mass per 100 parts of asphalt. This quantitative control simplifies the composition by defining clear acceptance criteria, making it easier to source and specify amorphous cellulose while achieving the desired environmental and performance benefits
3Reliability
If hydrophobized cellulose fiber is added to improve flow resistance and abrasion resistance, then crack resistance improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies the extraction principle by isolating and utilizing only the essential property of cellulose (amorphous structure with crystallization index ≤50%) without requiring complex hydrophobization treatments. This extraction of the key functional property simplifies the manufacturing process while maintaining improved crack resistance and flow resistance
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 asphalt composition effectively reduces the occurrence of rutting and fatigue cracking, enhancing the durability and environmental sustainability of asphalt pavements by improving plastic flow resistance and fatigue cracking resistance.
Implementation Method 1
improving mechanical strength and viscoelasticity
Data Source
AI summary
The present invention relates to an asphalt composition enabling one to provide an asphalt pavement in which the occurrence of rutting and fatigue cracking is inhibited and a method for producing the same, and to an additive for asphalt. The asphalt composition contains asphalt and cellulose, wherein the content of the cellulose is 0.01 part by mass or more and 10 parts by mass or less based on 100 parts by mass of the asphalt, and a crystallization index of the cellulose is 50% or less.