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High-grade road asphalt prepared from coal tar pitch

A technology for road asphalt and coal tar, which is applied in building components, building insulation materials, buildings, etc., can solve problems such as single modifier, lack of general attention, stability problems, etc., and achieve high temperature stability and penetration. The effect of decreasing and increasing the stability value

Active Publication Date: 2012-06-20
车春玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the modifiers in the market are used as a single addition, and mixed use has not yet received widespread attention due to stability issues.

Method used

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  • High-grade road asphalt prepared from coal tar pitch

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A high-grade road asphalt prepared from coal tar pitch, consisting of the following raw materials in parts by weight:

[0052] 30 parts of coal tar pitch

[0053] 15 parts petroleum pitch

[0054] Solvent oil: 30 parts of rubber solvent oil

[0055] Composite polymer additive 3 parts

[0056] Antiaging agent: 2 parts of N-phenyl-N`-isopropyl-p-phenylenediamine

[0057] Cross-linking agent: 0.3 parts of p-tolualdehyde.

[0058] According to the above ratio of raw materials, after dehydration, add solvent oil and mix 0.5 evenly, then add a composite polymer composed of 2 parts of waste rubber powder, 3 parts of regenerated rubber powder, 2 parts of polyvinyl chloride, and 4 parts of neoprene rubber The additive, anti-aging agent and cross-linking agent were reacted for 5 hours at a reaction temperature of 250°C, and the reaction was continued for 1 hour after cooling down to 120°C to obtain high-grade road asphalt. The specific performance indicators are shown in Exa...

Embodiment 2

[0060] A high-grade road asphalt prepared from coal tar pitch, consisting of the following raw materials in parts by weight:

[0061] 70 parts of coal tar pitch

[0062] 30 parts petroleum asphalt

[0063] Solvent oil: 50 parts of rubber solvent oil

[0064] Composite polymer additive 5 parts

[0065] Antiaging agent: 10 parts of N-phenyl-N`-isopropyl-p-phenylenediamine

[0066] Cross-linking agent: 0.5 parts of p-tolualdehyde.

[0067] According to the above ratio of raw materials, coal tar pitch is dehydrated, added solvent oil and mixed evenly for 1 hour, and then added a composite polymer consisting of 3 parts of waste rubber powder, 5 parts of recycled rubber powder, 5 parts of polyvinyl chloride, and 5 parts of neoprene rubber Additives, antioxidants and cross-linking agents react for 5 hours. The reaction temperature is 260°C. After cooling down to 120°C and adding polyvinyl chloride, the reaction is continued for one hour to obtain high-grade road asphalt. The sp...

Embodiment 3

[0069] A high-grade road asphalt prepared from coal tar pitch, consisting of the following raw materials in parts by weight:

[0070] 50 parts of coal tar pitch

[0071] 25 parts petroleum pitch

[0072] Solvent oil: 40 parts of rubber solvent oil

[0073] Composite polymer additive 4 parts

[0074] Antiaging agent: 5 parts of N-phenyl-N`-isopropyl-p-phenylenediamine

[0075] Cross-linking agent: 0.4 parts of p-tolualdehyde.

[0076] According to the above ratio of raw materials, coal tar pitch is dehydrated, then added solvent oil and mixed evenly for 0.8h, then added a composite polymer composed of 2 parts of waste rubber powder, 4 parts of regenerated rubber powder, 3 parts of polyvinyl chloride, and 4 parts of neoprene rubber Additives, antioxidants and cross-linking agents react for 5 hours. The reaction temperature is 250° C., and the reaction is continued for 1 hour after cooling down to 120° C. to obtain high-grade road asphalt. The specific performance index is sh...

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Abstract

The invention relates to asphalt, in particular to high-grade road asphalt prepared from coal tar pitch. The high-grade road asphalt comprises the following raw materials by part by weight: 30 to 70 parts of coal tar pitch, 15 to 30 parts of petroleum asphalt, 30 to 50 parts of solvent naphtha, 3 to 5 parts of composite polymer additive, 2 to 10 parts of antiager, and 0.3 to 0.5 part of cross linker. The high-grade road asphalt prepared from the coal tar pitch has the advantages as follows: the addition of the petroleum asphalt is reduced, and the usage amount of the coal tar pitch is increased; and the cost is reduced, and the performances of the road asphalt prepared from the coal tar pitch are improved, that is, the Engler viscosity of the asphalt is increased, the asphalt softening point is raised, the penetration degree is lowered, the high temperature stability is improved, the low-temperature ductility is greatly increased, and the low-temperature cracking resistance is remarkably improved.

Description

technical field [0001] The invention relates to an asphalt, in particular to a high-grade road asphalt prepared from coal tar pitch. Background technique [0002] The full name of coal tar pitch is coal tar pitch, which is the residue after distillation and extraction of fractions of coal tar (such as light oil, phenol oil, naphthalene oil, washing oil and anthracene oil, etc.), and is a bulk product separated during coal tar processing. Since 2001, because the market of coal tar processing products has been optimistic, coal tar processing enterprises have certain profit margins, so tar processing enterprises in various places are operating at full capacity and full capacity. It is estimated that the current national capacity of tar processing equipment is about 5.5 million tons. . The capacity of projects under construction, expansion, and proposed construction is about 2 million tons. The increase in coal tar processing volume has caused a large increase in coal tar p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08L17/00C08L27/06C08L11/00C08K5/18C08K5/07
Inventor 张成如
Owner 车春玲
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