Asphalt Mixture Gradation Detection Device
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Solution Overview
Problem
Existing methods for detecting the gradation of asphalt mixtures are manual, complex, and time-consuming, making it difficult to achieve automatic and rapid detection, especially in asphalt recycling processes.
Innovation Solution
An automatic and rapid detection method for asphalt mixture gradation is developed, utilizing a combination of computer control, sensors, and a detection device that includes a feeding mechanism, heating device, combustion device, vibration screening device, and weighing system to integrate moisture content, asphalt content, and aggregate gradation measurements in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual operation methods are used for detection, then the detection process is simple and easy to operate, but the detection time is long and automation is not achieved
Solution Approach 1:
The patent combines multiple detection functions (moisture content determination, asphalt content determination, and aggregate gradation measurement) into a single integrated detection device. The device merges the heating device, combustion device, vibration screening device, and weighing system into one unified system that can perform all detections automatically, resolving the contradiction between automation and complexity by consolidating functions rather than multiplying separate manual operations
Solution Approach 2:
The patent replaces manual mechanical operations with automated control systems. The controller automatically coordinates the heating device for moisture removal, the combustion device for asphalt burning, the vibration screening device for aggregate separation, and the weighing system for measurement. This substitution of manual mechanical operations with an integrated automated control system achieves automation while managing complexity through centralized control
2Productivity
If manual step-by-step detection is performed, then each detection step can be carefully executed, but the overall detection time is excessively long
Solution Approach 1:
The patent implements continuous automated detection where the controller coordinates the heating device, combustion device, vibration screening device, and weighing system to operate in continuous sequence without manual intervention between steps. The heating and drying process continues directly into combustion, which continues into screening and weighing, eliminating idle time and achieving continuous useful action throughout the entire detection process
Solution Approach 2:
The patent performs preliminary heating and drying of the asphalt mixture in the heating device before combustion occurs. This preliminary action removes moisture in advance, ensuring that the subsequent combustion process only needs to burn off asphalt without the complication of water evaporation, thereby streamlining the overall detection process and reducing total detection time
3Measurement precision
If multiple separate detection methods are used for moisture content, asphalt content, and aggregate gradation, then each parameter can be accurately measured, but the detection process becomes complex and cumbersome
Solution Approach 1:
The patent designs a universal detection device that performs multiple detection functions through a single integrated system. The same device housing contains the heating device for moisture determination, the combustion device for asphalt content determination, and the vibration screening device with weighing system for aggregate gradation measurement. This multi-functional design maintains measurement precision for all parameters while greatly simplifying operation, as the user only needs to operate one unified device rather than multiple separate instruments
Solution Approach 2:
The patent implements automatic control where the controller自行 coordinates all detection steps without requiring manual intervention. The controller automatically controls the heating device temperature and duration, manages the combustion process, operates the vibration screening device, and collects weighing data. This self-service automation maintains accurate measurement of all parameters while eliminating the complexity of manual step-by-step operations
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 method enables rapid, accurate, and automated detection of asphalt mixture properties, improving efficiency and reducing manual operation time, thereby facilitating timely feedback and precise control in asphalt recycling processes.
Implementation Method 1
heating the asphalt mixture in a heating device to remove moisture in the asphalt mixture and dehydrating the asphalt mixture to a target dehydration rate
Implementation Method 2
burning the dehydrated asphalt mixture in a combustion device by using a combustion method to form smoke configured to be removed
Implementation Method 3
grading through screening the aggregates obtained after the asphalt combustion according to different particle sizes of the aggregates by using a vibration screening device
Data Source
AI summary
An automatic and rapid detection method of a gradation for an asphalt mixture and an automatic device are provided. The method includes: asphalt mixture introduction; asphalt mixture dehydration, including: heating the asphalt mixture and dehydrating to a target dehydration rate; asphalt combustion, including: burning the asphalt mixture by using a combustion method to form smoke to be removed, thereby obtaining aggregates, and obtaining an asphalt content; aggregate screening, including: grading through screening the aggregates according to different particle sizes by using a vibration screening device, and then weighing the aggregates, thereby obtaining weights of the aggregates; and obtaining the gradation, including: calculating the gradation for the asphalt mixture according to the weights of the aggregates with the different particle sizes and the asphalt content. The method is operated by using simple instruments, automatically detecting moisture content, asphalt content, and aggregate gradation and rapidly detecting a new asphalt mixture.