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High-modulus modifier composite of bituminous mixture and preparation method thereof

An asphalt mixture and modifier technology, which is applied in building structures, building insulation materials, building components, etc., can solve the problems of high cost and complicated process, and achieve the effects of prolonging service life, simple processing technology and convenient use.

Active Publication Date: 2013-02-06
XIAN ZHONGLI ASPHALT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country's asphalt pavement has used modified asphalt materials for more than ten years. With the increase in the load capacity of road transportation vehicles in my country, the traffic volume of roads has also increased. If modified asphalt continues to be used, there are defects of high cost and relatively complicated process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An asphalt mixture high modulus modifier composition, the special feature of the present invention is that the asphalt mixture high modulus modifier consists of 10 to 30 parts of silicon powder, 0 to 20 parts Thermoplastic styrene-butadiene rubber (SBS), 30-50 parts of modified polyethylene (RPE), 0-10 parts of polyethylene (PE), 10-20 parts of modified polypropylene (RPP), 0-10 parts 1 part of polypropylene (PP), 0 part to 3 parts of ethylene-vinyl acetate polymer (EVA), 0 part to 1 part of anti-aging agent, 5 parts to 15 parts of asphalt, and the particle size of the silicon powder is 10 to 100 microns silicon dioxide, the EVA vinyl acetate content should account for 5% to 18% of the ethylene-vinyl acetate polymer mass, and the anti-aging agent refers to 2,2,4-trimethyl-1,2-dihydroquinoline morphine polymer, and described asphalt refers to more than one of construction asphalt, low-grade road asphalt, and natural asphalt.

[0024] The molecular weight of the SBS ther...

Embodiment 2

[0030] A kind of asphalt mixture high modulus modifier composition, by mass fraction ratio by 20 parts of silicon powder, 10 parts of thermoplastic styrene-butadiene rubber (SBS), 40 parts of modified polyethylene (RPE), 5 parts of polyethylene (PE), 15 parts of modified polypropylene (RPP), 5 parts of polypropylene (PP), 2 parts of ethylene-vinyl acetate polymer (EVA), 0.5 part of anti-aging agent, 10 parts of asphalt, the silicon powder particle size Silica of 10-100 microns, the SBS molecular weight is 200,000-300,000, the RPE, PE, RPP, PP molecular weight is 200,000-400,000 granular, the EVA vinyl acetate content is 15%, and the anti-aging agent is It refers to 2,2,4-trimethyl-1,2-dihydroquinoline polymer, and the asphalt refers to No. 30 construction asphalt.

[0031] A kind of preparation method of asphalt mixture high modulus modifier, carries out according to the following steps:

[0032] 1) Weigh 10 parts of SBS, 40 parts of RPE, 5 parts of PE, 15 parts of RPP, 5 par...

Embodiment 3

[0036]A kind of asphalt mixture high modulus modifier composition, by mass fraction ratio by 15 parts of silicon powder, 20 parts of thermoplastic styrene-butadiene rubber (SBS), 45 parts of modified polyethylene (RPE), 8 parts of polyethylene (PE), 18 parts of modified polypropylene (RPP), 7 parts of polypropylene (PP), 1.5 parts of ethylene-vinyl acetate polymer (EVA), 1 part of anti-aging agent, 13 parts of asphalt, the silicon powder particles Silica with a diameter of 10-100 microns, the EVA vinyl acetate content should account for 18% of the ethylene-vinyl acetate polymer mass, and the anti-aging agent refers to 2,2,4-trimethyl-1,2 -dihydroquinoline polymer, said asphalt refers to more than one of construction asphalt, low-grade road asphalt, and natural asphalt.

[0037] The molecular weight of the SBS thermoplastic styrene-butadiene rubber is 220,000-280,000, and the molecular weight of the RPE modified polyethylene, PE polyethylene, RPP modified polypropylene, and PP ...

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Abstract

The invention discloses a high-modulus modifier composite of a bituminous mixture and a preparation method thereof. The high-modulus modifier composite of the bituminous mixture comprises the following components in parts by weight: silica powder, thermoplastic butadiene styrene rubber, modified polyethylene, polyethylene, modified polypropylene, polypropylene, ethylene-vinyl acetate polymers, antiagers and bitumen. The preparation method of the high-modulus modifier composite of the bituminous mixture comprises the following steps of: weighing the components in the parts by weight according to a proportion; stirring the components, and raising temperature at the same time; then adding the silica powder, the antiagers and the bitumen to a molten mass, and stirring for uniformly mixing at 160-200 DEG C and under certain rotating speed; extruding through a screw extruder, cooling with normal temperature water, and cutting so as to obtain granular finished products. The invention enhances the elastic modulus, improves the adhesive property, enhances the high-temperature anti-rutting property, the water stable property and the ageing-resistant performance, obviously reduces the damages, i.e. rutting, process, bumps, cracks, pits, looseness, and the like, of bituminous pavements, has the advantages of simple processing process, prolonged service life and convenient use, omits a process link of modifying the bitumen and can be widely used for paving the bituminous pavements of roads.

Description

technical field [0001] The invention relates to a high modulus modifier composition for road engineering asphalt mixture and a preparation method thereof. Background technique [0002] As we all know, the cementing material of asphalt road surface is asphalt, which is a kind of thermoplastic material, which has the property of becoming soft at high temperature and brittle at low temperature, so asphalt pavement has oil flooding, rutting, yoke and other diseases in summer, and hardening, rutting and so on in winter. Cracking, loosening and other diseases, freeze-thaw cycles, rainwater infiltration, and aging of asphalt will cause damage to the pavement and loss of use function. [0003] In order to solve various diseases of asphalt pavement, road researchers are constantly studying prevention and solutions. From the perspective of improving material performance, such as modifying asphalt to reduce its temperature sensitivity and improve road performance; from the perspective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/04C08L23/10C08L9/06C08L23/06C08L23/12C08L23/08C08L95/00C08K3/36
Inventor 韩耀斌张巧宁张晓宏
Owner XIAN ZHONGLI ASPHALT CO LTD
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