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High-performance modified asphalt and preparation method thereof

A modified asphalt, high-performance technology, applied in building components, building insulation materials, construction, etc., can solve the problems of difficult production and processing of modifier addition, and achieve the effects of low price, energy reduction and simple production process

Inactive Publication Date: 2013-11-27
周乃承
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The high-performance modified asphalt and its preparation method improve the performance of the product through the optimized formulation of various modifiers; through the combined production process of grinding, shearing and mixing, the difficulty in adding various modifiers is solved Production and processing problems

Method used

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  • High-performance modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 7.8 tons of Liaohe No. 90 asphalt and heat it to 180°C in a reactor to obtain high-temperature asphalt. Add thermoplastic rubber accounting for 2% of the asphalt weight to the high-temperature asphalt, and use a high-speed shearing machine at a temperature >160°C. After grinding 3 times, pump it to the storage tank for development to obtain thermoplastic rubber modified asphalt; heat the thermoplastic rubber modified asphalt to 190°C, then add water less than 5%, metal content less than 0.4%, and ash content less than 8%. Number is 30 orders and accounts for the waste tire rubber powder of 20% of asphalt weight and accounts for 5% electric vacuum fly ash of asphalt weight, simultaneously, adds the rosin resin that accounts for the weight ratio of asphalt and is 3%, in mixing tank, temperature is >180°C, low-speed stirring (300-1000 rev / min) for 10 minutes, pumping to storage tank for 30 minutes, stirring evenly to obtain high-performance modified asphalt.

Embodiment 2

[0023] Take 8 tons of Liaohe No. 90 asphalt and heat it to 180°C in a reaction kettle, add thermoplastic rubber accounting for 4% of the asphalt weight to the high-temperature asphalt, and use a high-speed shearing machine in a mixing tank at 180°C to grind for 5 After one pass, pump it to the storage tank for development to obtain the developed product; obtain thermoplastic rubber modified asphalt; then add water less than 5%, metal content less than 0.4%, ash content less than 8%, mesh number is 30 mesh, accounting for 20% of asphalt weight waste tire rubber powder and 15% electric dust fly ash accounting for asphalt weight, at the same time, add 5% rosin resin accounting for asphalt weight ratio, in the mixing tank, heat up to 190 ° C, stir at low speed (300 ~ 1000 rpm / min) for 10 minutes, pumped to the storage tank for development, and stirred evenly to obtain high-performance modified asphalt.

Embodiment 3

[0025] Take 8.3 tons of Liaohe No. 90 asphalt and heat it to 180°C in a reaction kettle, add thermoplastic rubber accounting for 6% of the asphalt weight to the high-temperature asphalt, and use a high-speed shearing machine in a mixing tank at 180°C to perform high-speed shearing and grinding After 2 times, pump it to the storage tank for development to obtain a developed product; obtain thermoplastic rubber modified asphalt; then add water less than 5%, metal content less than 0.4%, ash content less than 8%, mesh number is 30 mesh, accounting for 15% of the weight of asphalt % waste tire rubber powder and 10% pozzolan by weight of asphalt, at the same time, add 6% rosin resin in the weight ratio of asphalt, in the mixing tank, the temperature is 170 ° C, low speed stirring (300 ~ 1000 rpm) 10 Minutes, pumped to the storage tank for development, stirred evenly, that is, high-performance modified asphalt.

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Abstract

The invention relates to high-performance modified asphalt. The high-performance modified asphalt is prepared from the following ingredients: asphalt, thermoplastic rubber, glue powder, an additive and a stabilizer, wherein the asphalt is heavy-traffic-road petroleum asphalt or cycloalkyl petroleum asphalt, the thermoplastic rubber is styrene-isoprene-styrene block copolymer (SIS) or styrene-butadiene-styrene (SBS), the glue powder is rubber powder which is formed through grinding waste and old tires prepared through normal temperature methods, the additive is volcanic ash or silicon powder or fly ash, and the stabilizer is rosin or rosin resin. The high-performance modified asphalt has better high-temperature stability, the softening point capable of reaching above 80 DEG C, better low-temperature stability, the brittle point being below -30 DEG C, relatively high elasticity, the elasticity recovery reaching over 90% and better adhesivity reaching over the level IV. The waste of energy and resources is reduced through using industrial and domestic wastes as much as possible, so that the preparation method has the advantages of energy saving, emission reduction, simple production process and low cost.

Description

technical field [0001] The invention relates to a road construction material, and in particular provides high-performance modified asphalt and a preparation method thereof. Background technique [0002] With the rapid development of highway construction and highway transportation industry, higher requirements are put forward for the comfort, durability, safety and environmental protection of road surfaces. In the vast northern regions of my country, there are common problems such as the annual maximum road surface temperature of about 70°C and the annual minimum road surface temperature of -30°C, large environmental temperature differences, heavy-duty transportation, and serious overloading. Ordinary asphalt and its mixture, as well as the commonly used SBS, SBR and other modified asphalt and its mixture cannot fully meet the requirements of high and low temperature stability, water stability, and small residual deformation required for road pavements in northern regions. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L21/00C08L93/04C08K3/00C08K3/02C08K3/36C08K3/22
Inventor 周乃承
Owner 周乃承
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