CN101624475A

CN101624475A - Cold regeneration modified asphalt

Info

Publication number: CN101624475A
Application number: CN200910162378A
Authority: CN
Inventors: （请求不公开姓名）
Original assignee: BEIJING JIUWEI XINDA TECHNOLOGY Co Ltd
Current assignee: BEIJING JIUWEI XINDA TECHNOLOGY Co Ltd
Priority date: 2009-08-14
Filing date: 2009-08-14
Publication date: 2010-01-13

Abstract

The invention discloses a cold regeneration modified asphalt, which comprises the following components in percentage by weight: 60 to 70 percent of AH-No.70 or AH-No.90, 4 to 5 percent of butadiene-bendiene latex SBS, 3 to 5 percent of styrene butadiene latex SBR, 3 to 7 percent of emulsifying agent, 1 to 3 percent of dispersant and 20 to 30 percent of water; and the cold regeneration modified asphalt is black and liquid state in appearance, and is mainly used for regeneration and utilization of prior materials of old pavement in the highway repair engineering. The cold regeneration modified asphalt is mainly characterized in that the utilization of the old pavement to maximum extent at normal temperature can be improved, ensures that all pavement construction processes of pavement, roller compaction and the like are completely carried out at normal temperature, realizes the regeneration and utilization of resources, saves heating energy, reduces the construction cost, improves the construction environment and is an environment-friendly pavement material.

Description

Cold regeneration modified asphalt

Technical field

The present invention relates to a kind of cold regeneration modified asphalt technology.The cold regeneration modified asphalt technology belongs to the macromolecule chemical industry field, is that a kind of compound macromolecular polymer is material modified.Application is a traffic highway road surface construction field, the special-purpose novel material of highway, motorway, town road pavement maintenance, construction.In road construction, mainly be to solve the inconvenience in process such as transport, pave, roll of hard pitch compound in mountain road, tunnel, the Road maintenance, the inconvenient problem of bringing to pavement construction and maintenance of surface.Especially under the situation that the limited construction environment in space on both sides of the road in the road, construction and traffic are taken into account simultaneously, avoid the crowded personal accident that brings to the workmen of environment in the construction of hard pitch compound; It is far away relatively to avoid mountain road construction to transport the road that the hard pitch compound executes, and causes the hard pitch compound to cause heat radiation serious, impacts for the pavement construction quality; Condition is limit and is stopped traffic when avoiding Road maintenance, causes social influence and financial loss, is that highway construction field is built, maintenance road new and high technology material.

Technical background

Because it is the highway in China construction entered overhaul, preserving period, how fully sharp in overhaul, preserving period

With the resource on former road surface, be not only the waste and old resource regeneration on former road surface, also be environmental issue.Domestic in the old asphalt pavement regeneration material uses with China in the world at present, generally adopt hot reclaiming process.This is because the aged asphalt in the old material need recover the bituminous function, needs to add to replenish new pitch, therefore adopts hot renovation process construction usually.The normal temperature modified pitch of cold regeneration has old pitch restore funcitons, has the modifying asphalt function simultaneously.Therefore provide a brand-new normal temperature constructional method to reclaiming process, cold recycled asphalt had both been saved the resource and the energy, had improved construction environment again, did not only discharge any pollution, and whole process does not have any waste gas yet and produces and discharging, belonged to environmental protection construction operating mode.

Summary of the invention

The objective of the invention is to remedy the problem that exists in the existing bituminous concrete pavement Road maintenance technomania regeneration.The normal temperature construction can solve the maintenance project of small serial production flexibly.Reduce the energy consumption energy-conserving and environment-protective.The present invention adopts following technical scheme: the normal temperature modified pitch of a kind of cold regeneration, and its formula for a product is: heavy traffic paving asphalt AH-70# or AH-90#:60-70%; Fourth Ethenylbenzene diene latex SBS:4-5%; Emulsifying agent: 3-7%; Styrene-butadiene latex SBR:3-5%; Dispersion agent: 1-3%; Water 20-30%; The products production polymerization temperature is 130-170 ℃, and Product Status is the normal temperature liquid state.

Cold regeneration modified asphalt disclosed by the invention has the following advantages:

1, cold regeneration modified asphalt has the function of modifying asphalt, can replace high temperature modified pitch to use in all highway pavement constructions.

2, have and use that object is more professional, more economical, use in the narrow limited pavement asphalt concrete construction of environment space.

3, construction operating mode environmental protection is to the workmen and surrounding environment has no effect and personal injury

4, be particularly useful for mountain road overhaul maintenance project, avoid mixing building to take up an area of and transport the financial loss of bringing with the insulation of asphalt.

5, construction does not influence traffic, even the highway section of necessary close traffic also can make traffic comparatively fast open.The specific heat bituminous pavement open to traffic time can shorten more than 2 times passable.

Technical target of the product

1. high-temperature behavior

The anti-rut of temperature: 60 ℃, 0.7Mpa, dynamic stability is greater than 6000 times/mm..

Solids content:＞65%

Softening temperature:＞65 ℃

Recovery of elasticity:＞80%

With suitable grating mix, 100 ℃ do not trickle not deliquescing.

2. low-temperature performance

Low temperature-10 ℃ does not become fragile

The flexural failure strain is not less than 5000 (μ ε)

Production technique

Earlier with heavy traffic paving asphalt AH-70# or AH-90#:60-70% metering, enter pitch reacting by heating still, then a certain amount of pitch is heated to 130-170 ℃, pitch with heating pumps in the high speed shear reactor again, simultaneously again with fourth Ethenylbenzene diene latex SBS:4-5% and styrene-butadiene latex SBR:3-5%; Add in the high speed shear reactor than row by certain, behind the shearing certain hour, again with emulsifying agent: 3-7%; Dispersion agent: 1-3%; Water 20-30%; Successively drop in the high speed shear reactor, the reprocessing certain hour, after the maintenance polymerization temperature was 130-170 ℃ of certain hour, product was promptly produced and is finished, and Product Status is the normal temperature liquid state.

Product component is described

Heavy traffic paving asphalt is the black thick liquid, and GB is AH-70# or AH-90#;

Fourth Ethenylbenzene diene latex SBS is the oyster white thick liquid, and fourth Ethenylbenzene diene content is 65%;

Styrene-butadiene latex SBR is the oyster white thick liquid, and its butylbenzene content is 60%;

Emulsifying agent is the black thick liquid, and content of lignin is 40%, the multiple content 15% of Tween80 and Span80;

Dispersion agent is faint yellow thick liquid, sodium laurylsulfonate content 80%;

Water is white clear liquid, and water hardness is less than 20 degree;

Claims

The present invention is a kind of normal temperature modified pitch, it is characterized in that:

1, its formula for a product is:

Heavy traffic paving asphalt is the black thick liquid, and GB is AH-70# or AH-90#:60-70%;

Fourth Ethenylbenzene diene latex SBS:4-5%; Be the oyster white thick liquid, wherein fourth Ethenylbenzene diene content is 65%;

Styrene-butadiene latex SBR, 3-5% is the oyster white thick liquid, wherein butylbenzene content is 60%;

Emulsifying agent: 3-7% is the black thick liquid, and wherein content of lignin is 40%, and it is 60% that soil temperature 60 and think of coil 80 compound content;

Dispersion agent: 1-3% is faint yellow thick liquid, sodium laurylsulfonate content 40%;

Water is white clear liquid: 20-30%, and water hardness is less than 20 degree.

2, production technique is:

Earlier with heavy traffic paving asphalt AH-70# or AH-90#:60-70% metering, enter pitch reacting by heating still, then a certain amount of pitch is heated to 130-170 ℃, pitch with heating pumps in the high speed shear reactor again, simultaneously again with fourth Ethenylbenzene diene latex SBS:4-5% and styrene-butadiene latex SBR:3-5%; By necessarily adding in the high speed shear reactor, shear after 10-40 minute, again with emulsifying agent: 3-7% than row; Dispersion agent: 1-3%; Water 20-30%; The priority order of pressing emulsifying agent, dispersion agent, water etc. drops in the high speed shear reactor, reprocesses 10-60 minute, and the polymerization temperature that adds man-hour remains on 130-170 ℃, and product is promptly produced and finished, and Product Status is the normal temperature liquid state.