Base Course Mixture Using Asphalt Emulsion and Cement
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Solution Overview
Problem
Conventional methods for constructing a base course require rolling compaction and precise adjustment of water content, which are energy-intensive and prone to variations in strength and density due to water content fluctuations.
Innovation Solution
A method and mixture for constructing a base course using an aggregate, asphalt emulsion, and cement in a high-water-content state above the optimum water content, eliminating the need for rolling compaction and water content adjustment, with a preferred ratio of asphalt emulsion and cement residues to enhance stability and adhesiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rolling compaction is used to construct base course, then the strength and density of base course can be improved, but energy consumption increases and construction becomes complex
Solution Approach 1:
The patent replaces the mechanical rolling compaction system with a chemical binding system. The mixture uses asphalt emulsion and cement as binders that chemically bond aggregate particles together, eliminating the need for mechanical rolling compaction equipment and the associated high energy consumption while still achieving sufficient base course strength
Solution Approach 2:
The patent changes the water content parameter to a high-water-content state (above optimum water content), which fundamentally alters the mixture's behavior. This parameter change allows the mixture to achieve adequate compaction and strength through chemical binding rather than mechanical rolling, thereby reducing energy consumption
2Stability of the object's composition
If rolling compaction is used to construct base course, then the density of base course can be improved, but device complexity and construction scale increase
Solution Approach 1:
The patent replaces complex mechanical rolling compaction equipment with simple spreading equipment. The chemical binders (asphalt emulsion and cement) provide the necessary cohesion and density without requiring large-scale mechanical compaction devices, thereby reducing device complexity
Solution Approach 2:
The mixture exhibits self-compacting properties due to the high-water-content state and chemical binding agents. The mixture naturally consolidates and achieves adequate density through the chemical binding process without requiring external mechanical compaction equipment
3Strength
If water content is adjusted to optimum water content, then the strength of base course can be improved, but construction flexibility decreases when water content is above optimum
Solution Approach 1:
The patent intentionally changes the water content parameter to a high-water-content state (above optimum water content), which is traditionally considered unfavorable. This parameter change, combined with chemical binders, allows construction to proceed flexibly without strict water content control while still achieving sufficient strength
Solution Approach 2:
The patent uses a composite material system combining aggregate, asphalt emulsion, and cement. This composite approach allows the mixture to tolerate high water content because the chemical binders provide structural integrity independent of precise water content control, thereby improving construction flexibility
4Loss of substance
If on-site base course recycling is performed, then waste generation can be reduced, but the complexity of mixing and compaction processes increases
Solution Approach 1:
The patent replaces complex mechanical compaction equipment with simple spreading equipment. The chemical binders provide the necessary cohesion for recycled materials without requiring intensive mechanical mixing or compaction, thereby reducing equipment complexity while enabling waste reduction through recycling
Solution Approach 2:
The patent recovers and reuses existing pavement materials by incorporating them into the base course mixture with chemical binders. This recycling approach reduces waste generation while the simplified chemical binding process reduces the complexity of handling and processing recycled materials
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 construction of a stable and strong base course without rolling compaction, allowing for flexible construction conditions and reduced energy consumption, with improved hardness and adhesiveness, and reduced cracking resistance.
Implementation Method 1
a mixture for base course, comprising an aggregate, an asphalt emulsion and a cement
Implementation Method 2
a mixture for base course, comprising an aggregate, an asphalt emulsion and a cement
Implementation Method 3
a water content of the mixture is above an optimum water content of the aggregate comprised in the mixture
Data Source
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AI summary
An object of the present invention is to provide a method for constructing a base course without rolling compaction, in which a compacting step by rolling compaction and further adjustment of the water content of the mixture to the optimum water content are not necessary, and to provide a mixture for base course, which enables the said method. The above object is attained by providing a method for constructing a base course without rolling compaction, which comprises a step of obtaining a mixture by mixing an aggregate, an asphalt emulsion, and a cement, wherein the mixture is in a high-water-content state in which a water content of the mixture is above an optimum water content of the aggregate, and a step of spreading the mixture; and which does not comprise a step of rolling compaction, and by providing a mixture for a base course, comprising an aggregate, an asphalt emulsion, and a cement, wherein the mixture is in a high-water-content state in which a water content of the mixture is above an optimum water content of the aggregate.