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Evaluation method for adhesion of oil modified asphalt and aggregate

An evaluation method and oil modification technology, applied in analytical materials, material thermal analysis, measuring devices, etc., can solve the problem that the water damage resistance of asphalt mixture is difficult to accurately evaluate, the adhesion lacks a quantitative and accurate evaluation method, The internal structure of asphalt pavement is damaged and other problems, and the evaluation results are accurate and reliable, avoiding the influence of human subjective factors, and the evaluation method is fast.

Pending Publication Date: 2021-10-26
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After water damage to the asphalt pavement, it will cause a variety of diseases, resulting in serious damage to the internal structure of the asphalt pavement, weakening the service quality of the asphalt pavement, shortening its service life, and bringing huge economic losses at the same time
Therefore, a good-quality asphalt mixture should have good water damage resistance. How to accurately determine the water damage resistance of asphalt mixture is very important. According to relevant research, it is one of the main factors affecting the water damage resistance of asphalt mixture. It is the adhesion between asphalt and aggregates, and the current evaluation of the adhesion between asphalt and aggregates only stays in the qualitative evaluation stage, and the adhesion between oil-modified asphalt and aggregates lacks quantitative and accurate results. The evaluation method makes it difficult to accurately evaluate the water damage resistance of asphalt mixture

Method used

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  • Evaluation method for adhesion of oil modified asphalt and aggregate
  • Evaluation method for adhesion of oil modified asphalt and aggregate
  • Evaluation method for adhesion of oil modified asphalt and aggregate

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0049] Specific implementation mode one: combine figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 Describe this embodiment. In this embodiment, at least two aggregate samples are selected. Each aggregate sample is correspondingly provided with a set of asphalt samples. Each set of asphalt samples includes matrix asphalt samples and various oil-modified asphalt samples. After each aggregate sample and its corresponding group of asphalt samples were boiled, the asphalt peeling index and asphalt peeling rate were calculated, and the adhesion between oil-modified asphalt and aggregate was evaluated according to the calculation results.

[0050] Further, the number of types of aggregate samples is at least two, the purpose is to study the sensitivity of the spalling resistance of oil-modified asphalt to lithology, when the number of types of aggregate samples is two, the two The aggregate samples are prefe...

specific Embodiment approach 2

[0057] Embodiment 2: This embodiment is a further limitation of Embodiment 1. In this embodiment, limestone and basalt with a maximum nominal particle size of 9.5 mm are used as aggregates in the boiling operation. Each aggregate sample and its corresponding group of asphalt samples were boiled for base asphalt samples, and each aggregate sample was boiled for each oil-modified asphalt sample. Same, the operation process is:

[0058] Step 1: Wash the aggregates used and dry them in an oven at 100°C for 11.5 to 12.5 hours;

[0059] Step 2: Weigh 1kg of aggregate and 30g of base asphalt, respectively, and place the weighed 1kg of aggregate and 30g of base asphalt into an oven at 155°C for 3 hours at a constant temperature;

[0060] Step 3: Put 30g of matrix asphalt and 1kg of aggregate heated in step 2 into a mixing pot and stir for 1.5 to 2.5 minutes to form a matrix asphalt mixture specimen;

[0061] Step 4: Put the matrix asphalt mixture specimen that has been stirred in St...

specific Embodiment approach 3

[0068] Embodiment 3: This embodiment is a further limitation of Embodiment 1 or 2. According to UNI EN12697-11 (2012), the asphalt coating ratio of the base asphalt mixture and the asphalt coverage of different oil-modified asphalt mixtures Calculate the occurrence frequency of aggregates under each stripping rate condition, draw the frequency curve, and calculate the asphalt coating rate of the matrix asphalt mixture and the stripping index SI of different oil-modified asphalt mixtures, so as to quantitatively evaluate the matrix The anti-stripping performance of asphalt mixture and different oil-modified asphalt mixtures, the asphalt coverage rate of the base asphalt mixture and the quantitative order of the peeling ability of different oil-modified asphalt mixtures from strong to weak, peeling index The formula for calculating SI is:

[0069]

[0070] In the above formula, N i for the M i Frequency of occurrence of aggregates under spalling rate conditions.

[0071] S...

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Abstract

The invention discloses a method for evaluating the adhesion of oil modified asphalt and aggregate, which comprises the following steps: selecting at least two aggregate samples, arranging a group of asphalt samples corresponding to each aggregate sample, and each group of asphalt samples comprising a matrix asphalt sample and a plurality of oil modified asphalt samples, performing water boiling operation on each aggregate sample and a group of asphalt samples corresponding to the aggregate sample, performing related calculation on an asphalt peeling index and an asphalt peeling rate, and evaluating the adhesion of the oil modified asphalt and the aggregate according to a calculation result. The evaluation method is reasonable and rigorous, and the evaluation mode is comprehensive and reliable. The quantitative evaluation of the adhesion performance between the oil modified asphalt and the aggregate is completed, and favorable conditions are provided for the quantitative evaluation of the water damage resistance of the asphalt mixture.

Description

technical field [0001] The invention relates to an evaluation method, in particular to an evaluation method for the adhesion between oil-modified asphalt and aggregates. Background technique [0002] One of the three major diseases affecting the life of asphalt pavement is water damage. Water damage to the asphalt pavement will cause various diseases, resulting in serious damage to the internal structure of the asphalt pavement, weakening the service quality of the asphalt pavement, shortening its service life, and bringing huge economic losses at the same time. Therefore, a good-quality asphalt mixture should have good water damage resistance. How to accurately determine the water damage resistance of asphalt mixture is very important. According to relevant research, it is one of the main factors affecting the water damage resistance of asphalt mixture. It is the adhesion between asphalt and aggregates, and the current evaluation of the adhesion between asphalt and aggrega...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/00
CPCG01N25/00Y02A30/30
Inventor 岳宗豪张磊李剑新李奕佳黄宏海
Owner PETROCHINA CO LTD
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