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A method of distinguishing between high-modulus agents and anti-rutting agents

An anti-rutting agent and high-modulus agent technology, which is applied in the fields of analyzing materials, measuring devices, DC flow characteristics measurement, etc., can solve the problems of cumbersome detection process, difficult to master, and high professional requirements. Ease of Access, Reduced Trial Costs

Active Publication Date: 2021-09-24
HENAN HIGHWAY ENG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the technical problems in the prior art, for example: distinguishing between high modulus agents and anti-rutting agents requires chemical composition analysis and multiple performance measurements, such as: including Vicat softening temperature, shrinkage rate, etc.; the detection process is relatively cumbersome. For High professional requirements, generally not easy to master, etc.

Method used

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  • A method of distinguishing between high-modulus agents and anti-rutting agents
  • A method of distinguishing between high-modulus agents and anti-rutting agents
  • A method of distinguishing between high-modulus agents and anti-rutting agents

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preparation example Construction

[0056] Further, the preparation method of the asphalt binder of the present invention comprises the following steps:

[0057] Step 1), take the base asphalt sample and heat it, then add the sample to be tested to obtain the premixture;

[0058] In step 2), the pre-mixture is sheared and then molded to obtain an asphalt binder.

[0059] Preferably, in step 1), in order to better dissolve the sample to be tested in the base asphalt sample, the heating temperature may be 160°C-180°C, for example, 165°C, 170°C, 175°C, etc.

[0060] In the step 2), in order to prepare an asphalt binder with excellent and stable performance, the shearing treatment includes: a pre-shearing step and a shearing development step. specifically:

[0061] The pre-shearing step includes: performing a preliminary shearing treatment on the pre-mixture at a rotational speed of 4000r / min to 5000r / min to obtain a pre-sheared product; through the preliminary shearing treatment, the base asphalt sample and the t...

Embodiment 1

[0102] Melt Mass Flow Rate Determination

[0103] Take 1# sample as the sample to be tested. Utilize analytical balance to weigh 5g of 1# sample;

[0104] The melt mass flow rate is determined according to the quality measurement method of thermoplastic melt flow rate in GB / T 3682.1-2018 "Determination of Thermoplastic Melt Mass Flow Rate and Melt Volume Flow Rate". The specific measurement conditions are as follows: a temperature of 190° C. and a load of 2.16 kg of counterweight.

[0105] Put the sample into the graduated cylinder, conduct the test according to the measurement method in section 9.5, and read the MFR test results on the display screen. The measurement results are shown in Table 1 below.

[0106] Preparation of asphalt binder

[0107] (1) Take 500g of 35# road petroleum asphalt; heat it in an oven to 170°C for subsequent use;

[0108] (2) Take 1# sample 35g (according to 7% of 35# road petroleum asphalt quality), slowly join in the 35# road petroleum as...

Embodiment 2

[0119] In Example 2, except that the 1# sample was replaced by the 2# sample, the measurement was carried out in the same manner as in Example 1, and the measurement results are shown in Table 1 and Table 2.

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Abstract

The present invention provides a method of distinguishing between high modulus agents and anti-rutting agents. The method comprises: taking the sample to be tested, measuring the melt mass flow rate of the sample to be tested at 190° C. under a load of 2.16 kg of counterweight; if the melt mass flow rate is less than 2g / 10min, it is determined that the sample to be tested is Anti-rutting agent; if the melt mass flow rate is ≥ 2g / 10min, take the base asphalt sample to prepare the asphalt binder mixed with the sample to be tested; at a temperature of 25°C, measure the delay time of the asphalt binder before and after aging degree, and / or the penetration after aging; if the penetration of the asphalt binder after aging is greater than 100; and / or, the ductility of the asphalt binder after aging is greater than the ductility before aging, then it is determined that the sample to be tested is Anti-rutting agent; if the penetration of the asphalt binder after aging is ≤100; and the ductility of the asphalt binder after aging is less than or equal to the ductility before aging, then it is determined that the sample to be tested is a high modulus agent. The method is simple and easy, and can effectively and quickly distinguish the high modulus agent from the anti-rutting agent.

Description

technical field [0001] The invention relates to a method for distinguishing a high modulus agent and an anti-rutting agent, and belongs to the field of performance testing of road materials. Background technique [0002] High-modulus asphalt mixture is suitable for high-temperature, high-traffic, heavy-duty, and overloaded high-grade roads. The design of the mixture takes into account the high modulus of the binder, anti-fatigue performance, high temperature resistance and water damage resistance, and meets the requirements of long-life asphalt pavement , its technology has been successfully applied in a large number at home and abroad. [0003] At present, existing researches believe that there are three technical approaches to realize high modulus asphalt mixture: (1) use hard asphalt (low-grade asphalt with a penetration of 25°C < 25); (2) add high modulus modifiers; (3) Use composite modified asphalt, such as natural asphalt modified asphalt. According to the curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/00G01N11/12G01N11/06G01N3/28G01N1/28G01N1/36G01N1/44
CPCG01N1/286G01N1/36G01N1/44G01N3/28G01N11/00G01N11/06G01N11/12
Inventor 周合宽王国晓严二虎李明杰李昊郝玮谢琳李青魏东周震宇
Owner HENAN HIGHWAY ENG GROUP
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