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Method for detecting content of effective rubber powder in rubber asphalt

A technology of rubber asphalt and detection method, which is applied in the direction of removing certain components, weighing, plastic recycling, recycling technology, etc., can solve the problem of reducing the performance of rubber asphalt, the content of effective rubber powder in rubber asphalt is not up to standard, adding rubber powder. low volume issues

Active Publication Date: 2022-01-07
GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing rubber asphalt, the addition of rubber powder in some rubber asphalt is lower than the normal level, or some rubber powder substitutes (such as organic substances such as cheap resins) are used to replace rubber powder, which will lead to effective The content of rubber powder is not up to standard, which reduces the performance of rubber asphalt
[0004] The content of rubber powder in rubber asphalt is an important indicator for evaluating the quality of rubber asphalt, but there is no research on the detection method of effective rubber powder content in rubber asphalt in the prior art

Method used

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  • Method for detecting content of effective rubber powder in rubber asphalt
  • Method for detecting content of effective rubber powder in rubber asphalt
  • Method for detecting content of effective rubber powder in rubber asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Three solvents (kerosene, trichlorethylene and n-heptane) were selected to dissolve rubber powder R (large vehicle tire rubber powder) and rubber asphalt AR respectively. Wherein, dissolving rubber powder R comprises the following steps:

[0077] Mass is M 0 Mix the rubber powder with the solvent at 45°C, the mass ratio of the rubber powder to the solvent is 1:50, vibrate while mixing, the vibration speed is 400r / min, first pass through the centrifuge (speed 1500rpm) to preliminarily separate and precipitate the insoluble matter Drying quality M 1 , and then filtered through the precision filter equipment to obtain the total mass of the filter equipment M 2 , Filtration equipment and residue drying quality after filtration M 3 , the insoluble matter is considered as undissolved rubber powder.

[0078] Calculate the solubility of rubber powder in rubber asphalt according to formula 2.

[0079]

[0080] The solubility of rubber powder in three different solvents i...

Embodiment 2

[0097] Trichlorethylene was selected as the solvent, and two groups of rubber asphalt samples from different projects were taken to test the amount of rubber powder. Calculation procedure is the same as example 1, wherein the solubility of rubber powder in trichlorethylene is taken as 4.87%, carries out parallel test respectively and obtains test result as follows:

[0098]

[0099] The results of the three groups of parallel tests were almost the same, and within the range of test error, the average value was taken as the final effective rubber powder content. Through the test method of the invention, the mixing amount of the main modifier rubber powder in the on-site rubber asphalt can be quickly and quantitatively detected, thereby evaluating the performance of the asphalt to a certain extent. The effective rubber powder content of sample B in Example 2 is low, which reminds users to pay attention to the performance of this kind of asphalt. Since the rubber powder of as...

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Abstract

The invention provides a method for detecting the content of effective rubber powder in rubber asphalt, and belongs to the technical field of component detection. The method comprises the following steps that: to-be-detected rubber asphalt is mixed with a solvent, and the mixture is sequentially oscillated, centrifuged, filtered and dried, wherein the solvent is one or more of trichloroethylene, kerosene and n-heptane; and the content of the effective rubber powder in the rubber asphalt is calculated according to a formula 1. According to the properties that rubber powder in rubber asphalt is almost insoluble in trichloroethylene, kerosene and n-heptane solvents, and asphalt is soluble in trichloroethylene, kerosene and n-heptane solvents, the mass percentage content of insoluble rubber powder in the asphalt is calculated, and the dissolution mass loss of the rubber powder in the solvents is supplemented, so that the content of the effective rubber powder in the rubber asphalt can be simply, conveniently and quickly obtained, and a basis is provided for evaluating the quality of the rubber asphalt. The difference value between the effective rubber powder content obtained by the method and the rubber powder content in the rubber asphalt standard product is within -0.3%, which shows that the detection method provided by the invention has good accuracy.

Description

technical field [0001] The invention relates to the technical field of component detection, in particular to a method for detecting the content of effective rubber powder in rubber asphalt. Background technique [0002] Rubber asphalt is a modified asphalt material formed by mixing rubber powder with asphalt and reacting at high temperature. Rubber asphalt can not only greatly improve the road performance of asphalt pavement, prolong the service life of the pavement, and reduce the cost of road construction. Since most of the rubber powder used is waste tire rubber powder, it can also play a role in pollution control, resource conservation, and comprehensive utilization of a large amount of waste. It is in line with the national environmental protection policy and the requirements of developing circular economy and building a conservation-oriented society. [0003] During the production of rubber asphalt, rubber powder and asphalt contact, and there will be obvious material...

Claims

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Application Information

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IPC IPC(8): G01N5/04
CPCG01N5/04Y02W30/62
Inventor 谭继宗袁海涛王秋敏熊保林王勇张红波张洪刚尹业豪王晓磊刘平潘治琼
Owner GUANGXI TRANSPORTATION SCI & TECH GRP CO LTD
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