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A design method for dry micro-surfacing of waste rubber powder

A technology of waste rubber powder and micro-surfacing, which is applied in design optimization/simulation, general water supply saving, special data processing applications, etc. It can solve the problems of wasting test materials, increasing costs, and increasing the number of tests, so as to improve driving comfort , Improve the wear resistance performance and avoid the effect of the number of tests

Active Publication Date: 2020-03-24
SHANDONG JIAOTONG UNIV +1
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  • Abstract
  • Description
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Problems solved by technology

Since the mixing ratio design of the micro-surface is affected by many factors, if we analyze the influence of each factor on each test in detail, not only the number of tests is very large, but also it is difficult to find representative test results. out of order
If you forcibly connect the data that seem to be related on the surface but are actually very different in experimental factors, it will cause misjudgment of the degree of influence of each experimental factor, which will lead to inaccurate mix ratio design.
It will not only waste test materials and increase costs, but also waste manpower and material resources, and more seriously, wrongly guide production practices, causing serious consequences

Method used

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  • A design method for dry micro-surfacing of waste rubber powder
  • A design method for dry micro-surfacing of waste rubber powder
  • A design method for dry micro-surfacing of waste rubber powder

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Embodiment

[0029] Step 1: Select raw materials. Micro-surfacing has higher requirements on raw materials. For emulsified asphalt, cationic polymer modified emulsified asphalt is selected. Hard basalt was selected as the aggregate, 40 mesh, 60 mesh, and 80 mesh waste rubber powder was selected as the rubber powder, P·O42.5 ordinary Portland cement was selected as the cement, and drinking water was selected as the test water.

[0030] Step 2: Inspection of raw materials. Firstly, the modified emulsified asphalt was tested, and all the indicators met the requirements of the "Technical Guidelines for Microsurfacing and Slurry Sealing", as shown in Table 1. Inspect the aggregates, inspect the coarse and fine aggregates according to the specifications, and measure the sand equivalent of synthetic mineral materials. The test results meet the requirements, as shown in Table 2.

[0031] Step 3: Gradation design. According to the results of the screening test, the gradation design of the micro-s...

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Abstract

The invention discloses a dry-process micro-surfacing design method for waste rubber powder, which relates to the technical field of pavement engineering. Screening test results to determine the gradation types are coarse gradation, medium gradation and fine gradation, which are determined according to four test factors (rubber powder content, rubber powder mesh, oil-stone ratio, gradation type) and three levels Choose the orthogonal table L9 (3 4 ), carried out 9 groups of tests, respectively measured the mixing time, cohesion value, wet wheel wear value, load wheel sand sticking amount and wheel rut deformation rate, calculated the range, variance, F ratio according to the test results, and combined with the chart Analysis of factors affecting strength to determine the optimal mix ratio. This method can not only avoid the complicated number of tests, but also can find regular data from many test results, analyze the test factors, and get the optimal mix ratio.

Description

technical field [0001] The invention relates to the technical field of pavement engineering, in particular to a design method for waste rubber powder dry micro-surfacing. Background technique [0002] Due to the advantages of crack sealing, rut filling, structural repair, water tightness and rapid recovery of road surface services, microsurfacing has been widely used in preventive maintenance and rut filling of high-grade highways at home and abroad, and has been proved to be a A cost-effective maintenance measure. [0003] However, ordinary micro-surfacing generally has disadvantages such as high driving noise, poor wear resistance and short service life, which affects the promotion and application of this technology in preventive maintenance. Try to use rubber powder as the filler of the micro-surfacing mixture and add it by dry method to adapt to the convenient and fast process characteristics of the micro-surfacing, and improve the high-temperature and low-temperature p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04G06F30/20
CPCC04B28/04G06F30/20C04B14/04C04B18/22C04B24/36Y02A20/152
Inventor 叶亚丽庄传仪郭金科刘志杭王淑华张爱勤李侠张伟王莉李红阳康荣玲王若檀孙庆千刘娇
Owner SHANDONG JIAOTONG UNIV
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