Proportion determination method based on balance coefficient for asphalt mixture hot-aggregate bins
A technology of asphalt mixture and equalization coefficient, which is applied in the direction of mixing operation control, chemical instrument and method, mixing operation control device, etc., can solve the problems of increasing production cost, reducing the production efficiency of mixture, and insufficient feeding, and achieves the reduction of waste The effect of producing, saving production cost and improving production efficiency
Inactive Publication Date: 2013-08-28
RES INST OF HIGHWAY MINIST OF TRANSPORT +1
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Problems solved by technology
[0004] The unreasonable ratio of the hot silo will lead to the mixture production process, some silos will wait for a long time due to insufficient feed, which will reduce the production efficiency of the mixture and increase the production cost; Too much material will cause overflow in the silo, resulting in waste of raw materials, and also increase the production cost of the mixture
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[0051] Taking the AC-10 mixture design of a certain project as an example, the specific steps are as follows:
[0052] Step 1: Determine the average value of aggregate grading of each specification
[0053]The aggregate specifications of each grade of AC-10 mixture in this project are: 0~3 limestone machine-made sand; 5~10 limestone crushed stone. According to different batches of raw materials entering the site, materials are taken and screened at different locations in the stockyard and stockpile. The specific screening data are shown in Table 1 and Table 2, and the mineral powder screening data are shown in Table 3. And the standard deviation and coefficient of variation of raw materials with different sizes of aggregates and different particle sizes were counted, as shown in Table 4.
[0054] Table 15 ~ 10 grades of material 11 sampling screening results
[0055]
[0056] Table 20 ~ Grade 3 material 11 sampling screening results
[0057]
[0058]
[0059] Table...
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The invention relates to a proportion determination method based on a balance coefficient for asphalt mixture hot-aggregate bins. The method comprises the following steps of: (1) determining the grading average value of aggregates with various specifications; (2) determining the proportion of the cold-aggregate bins of a mixing station; (3) determining the balance coefficient of the hot-aggregate bins of the mixing station; (4) determining the grading composition of each hot-aggregate bin, and calculating the theoretical proportion of the dosage of the aggregates of each grade; (5) verifying whether mineral mixture grading is corresponding to synthetic grading under the corresponding proportion; and (6) performing trial mixing verification to finally design the asphalt-aggregate ratio, grading, volume parameters and pavement performance of the mixture in the proportion of the hot-aggregate bins. According to the proportion determination method for the hot-aggregate bins of the asphalt mixture mixing station disclosed by the invention, the problems of material waiting and material overflow brought by the traditional proportion determination method for hot-aggregate bins can be overcome, the production efficiency can be effectively increased, the generation of wastes can be reduced, and the production cost can be saved.
Description
technical field [0001] The present invention mainly relates to the field of asphalt concrete construction in road engineering, and in particular to the determination of the ratio of hot feed bins in the mixing ratio design stage of asphalt mixture production, including the determination of the average value of aggregate gradation of various specifications, the ratio of cold feed bins and hot feed bins in mixing stations Ratio determination, mixture performance verification based on equilibrium coefficient design. Background technique [0002] According to the requirements of my country's current asphalt mixture production process, its mixing station equipment is mainly intermittent forced asphalt mixture mixing equipment. Therefore, the mineral material gradation design needs to go through two stages: target mix ratio and production mix ratio. The target mix ratio is mainly to determine the proportion of cold material bins in the mixing station, while the production mix rati...
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Inventor 王旭东张蕾周兴业曾峰肖倩张晨晨张宇单伶燕
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT