Modified asphalt composition particle and preparation method thereof

A technology of modified asphalt and composition, applied in the field of petroleum asphalt, can solve problems such as increasing the difficulty of asphalt dispersion, and achieve the effect of improving quality

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
13 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

This additive composition can be effective in a wide range of temperature and pressure, but simple mechanical mixing is difficult to effectively play the role of asphalt with different softening points
Using several kinds of asphalt with different softening points to mechanically mix, simple combination, each ...
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Abstract

The invention discloses modified asphalt composition particle and its preparation method. The modified asphalt composition particle comprises the following ingredients (by weight): 15-60 parts of high softening point asphalt I, 10-50 parts of high softening point asphalt II and 20-50 parts of rubber powder granule. The high softening point asphalt II coats the rubber powder granule. The high softening point asphalt I coats the high softening point asphalt II. Softening point difference of the high softening point asphalt I and the high softening point asphalt II is 15-50 DEG C. The modified asphalt composition particle of the invention has high softening point and excellent high temperature performance. The preparation method is simple. The product can continuously play a role in deep well drilling under the drilling operation condition of wide temperature range, and has good plugging and filtration-reducing effects.

Application Domain

Drilling compositionBuilding insulations

Technology Topic

AsphaltPitch +3

Image

  • Modified asphalt composition particle and preparation method thereof

Examples

  • Experimental program(3)
  • Comparison scheme(3)

Example Embodiment

[0044] Example 1
[0045] (1) Mix the high softening point asphalt I (softening point is 200℃) with kerosene to obtain mother liquor I (mixing mass ratio is 2:1), and then spray the mother liquor I evenly on the rubber powder particles (mass ratio of mother liquor to rubber powder particles) 1:1), after standing for 2 hours to infiltrate, and then under vacuum conditions (temperature 80℃, pressure ≤8kPa, time 2 hours) to remove the compatibilizer, the remaining materials are frozen (freezing temperature -35℃, freezing The time is 12 hours), pulverize to obtain modified rubber powder particles.
[0046] (2) Take 100g of high softening point asphalt II (softening point is 180°C) and 70g of kerosene in a container, stir at room temperature (25°C) for 30 minutes, and prepare mother liquor II after fully mixing; 60g modified rubber powder The particles and mother liquor II are mixed in the reactor, and compressed air is passed into it, the gas inlet pressure is 0.15MPa, the reactor temperature is maintained at 180~190℃, stirred for 100 minutes, discharged, and cooled to obtain a high softening point asphalt mixture;
[0047] (3) Mix 100g of low-temperature embrittlement-treated high-softening point asphalt mixture (low-temperature embrittlement conditions: temperature -25°C, time 8 hours), 4g hydrotalcite and 1.5g sodium lignosulfonate, and put it into a vibrating screen. 80 mesh standard sieve is selected as the bottom of the sieve, vibrated and crushed for 20 seconds, and the modified asphalt composition particles are obtained under the sieve, which is recorded as A1.

Example Embodiment

[0048] Example 2
[0049] (1) Mix the high softening point asphalt I (softening point is 250℃) with diesel oil to obtain mother liquor I (mixing mass ratio is 1:1), and then spray the mother liquor I evenly on the rubber powder particles (the quality of mother liquor and rubber powder particles) The ratio is 2:1). After standing for 4 hours, the compatibilizer is removed under vacuum condition (temperature 100℃, pressure≤8kPa, time 1 hour), and the remaining materials are frozen (freezing temperature -25℃, freezing The time is 10 hours), pulverize to obtain modified rubber powder particles.
[0050] (2) Take 100g high softening point asphalt II (softening point is 220℃) and 50g diesel oil in a container, stir at 50℃ for 30 minutes at room temperature, and prepare mother liquor II after fully mixing; combine 100g modified rubber powder particles with The mother liquor II is mixed in the reactor, and compressed air is introduced. The gas inlet pressure is 0.25MPa. The reactor temperature is maintained at 230~240℃, stirred for 70 minutes, discharged, and cooled to obtain a high softening point asphalt mixture;
[0051] (3) Mix 100g of the low-temperature embrittlement high softening point asphalt composition (the embrittlement treatment conditions are the same as in Example 1), 5g graphite, 1g cetyltrimethylammonium bromide and 3g carboxymethyl starch. Put it into a vibrating sieve, select a 100-mesh standard sieve at the bottom of the sieve, vibrate and crush for 20 seconds, and obtain modified asphalt composition particles under the sieve.

Example Embodiment

[0052] Example 3
[0053] (1) Mix high softening point asphalt I (with a softening point of 140℃) and gasoline to obtain mother liquor I (mixing mass ratio is 3:1), and then spray the mother liquor I evenly on the rubber powder particles (the quality of mother liquor and rubber powder particles) The ratio is 3:1). After standing for 1 hour, the compatibilizer is removed under vacuum condition (temperature 50℃, pressure≤8kPa, time 1.5 hours), and the remaining materials are frozen (freezing temperature -30℃, freezing The time is 8 hours), pulverize to obtain modified rubber powder particles.
[0054] (2) Take 100g of high softening point asphalt II (with a softening point of 170℃) and 100g of gasoline in a container, stir at 80℃ for 35 minutes at room temperature, and prepare mother liquor II after thorough mixing; combine 120g of modified rubber powder particles with The mother liquor II is mixed in the reactor, and compressed air is introduced. The gas inlet pressure is 0.3MPa. The temperature of the reactor is maintained at 150~160℃, stirred for 60 minutes, then heated to 165℃, stirred for 10 minutes, discharged and cooled. High softening point asphalt mixture;
[0055] (3) Mix 100g of asphalt composition, 6g of montmorillonite and 0.5g of octadecyltrimethylammonium bromide evenly, put them into a vibrating screen, use a 120-mesh standard sieve at the bottom of the screen, vibrate and crush for 25s, and change the screen Asphalt composition particles.
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PUM

PropertyMeasurementUnit
Softening point200.0°C
Softening point250.0°C
Softening point140.0°C
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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