CN108239406A

CN108239406A - A kind of modified asphalt material for adding ethylene-acrylate

Info

Publication number: CN108239406A
Application number: CN201611230046.8A
Authority: CN
Inventors: 邓小金
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-27
Filing date: 2016-12-27
Publication date: 2018-07-03

Abstract

The invention discloses a kind of modified asphalt materials for adding ethylene-acrylate.Modified asphalt material preparation process is：Matrix pitch is added in asphalt heating tank first, after being heated to certain temperature, continuous heating to pitch stops bubbling again, then stop heating and pouring into agitator tank, then a certain proportion of sulphur and SBS modifier are added, it is stirred again with blender, in the case of lasting stirring, add a certain amount of ethylene-acrylate modifying agent, it is swollen, asphalt in agitator tank by colloid mill is ground one time and is driven into another agitator tank, so mill for several times, can obtain a kind of modified asphalt material after mixing altogether repeatedly.It is good that it prepares modified asphalt material comprehensive performance.

Description

A kind of modified asphalt material for adding ethylene-acrylate

Technical field

The present invention relates to a kind of road asphalt, more particularly to a kind of pitch for adding modifying agent and preparation method thereof belongs to Pitch manufacture field.

Background technology

Constantly increase with the ratio of heavy vehicle, in face of the heavy traffic capacity of the present and the future, use traditional material The service life of the bituminous paving of material, the highway traditionally designed and airfield runway will constantly reduce.In order to improve pitch Properties of product, a feasible method is exactly to change the characteristic of traditional asphalt so that pitch have more excellent performance.

The dark brown complex mixture that pitch is made of the hydrocarbon and its non metallic derivatives of different molecular weight, It is one kind of high viscosity organic liquid, is in a liquid state, surface is in black, dissolves in carbon disulfide.Asphalt modification has become current generation The hot issue of various countries of boundary, early in 1873, British Samuel Whiting just applied for the patent of rubber modified asphalt. The bituminous paving for mixing rubber has been built by France within 1902.With the development of highway communication cause, modified pitch has obtained increasingly It is widely applied.However, most polymers asphalt modifier, all it is not easy compatible with pitch and easy to aging, needs special set Standby and higher energy consumption, and construction workability is poor.SBS belongs to one of most common asphalt modifier, it be styrene- Butadiene-styrene triblock copolymer, two phase structure is significantly presented in polystyrene chain segment and polybutadiene segments in SBS, Polybutadiene is continuous phase, and polystyrene is dispersed phase, makes it have 2 glass transition temperatures, the end group between Tg1-Tg2 Polystyrene, which flocks together, to be formed microcell and is scattered between polybutadiene continuous phase, plays physical crosslinking, fixed segment, vulcanization Enhancing and the effect of anti-cold flow, but single modifying agent can only often improve the single performance of pitch, the present invention is with matrix pitch For raw material, in process engineering, other than adding SBS modifier, ethylene-acrylate modifying agent is also added, makes modification Pitch comprehensive performance is good.

Invention content

The object of the present invention is to provide a kind of modified pitch, the preparation method of the modified pitch carries out as follows：

(1) first matrix pitch raw material is squeezed into from de- bucket device in heating tank, it is heated；

(2) when pitch is heated to no longer bubbling, heating is stopped, and rapidly pour into the asphalt stock of heating in one agitator tank；

(3) suitable polysulfide sulphur and SBS modifier are added into agitator tank again；

(4) start blender, add suitable ethylene-acrylate, be swollen；

(5) carrying out after being swollen fully, the asphalt in agitator tank is ground one time by colloid mill to be driven into another agitator tank, It is shut down after all having ground；

(6) the honed asphalt by colloid mill is ground one time again and be driven into previous agitator tank, so grind number altogether repeatedly Time, you can obtain a kind of modified asphalt material.

As the present invention preferred embodiments, step (1) in, heating temperature be 120-160 DEG C.

As the present invention preferred embodiments, step (3) in, the additive amount of sulphur accounts for the 2-5% of matrix pitch weight.

As the present invention preferred embodiments, step (3) in, the additive amount of SBS accounts for the 3-5% of matrix pitch weight.

As the present invention preferred embodiments, step (4) in, the additive amount of ethylene-acrylate accounts for matrix pitch weight 3-5%.

As the present invention preferred embodiments, step (6) in, repeatedly altogether grind 3-5 times.

Preferentially, in the case of being modified at the scene, general later stage development needs 1-2 hour.

Preferentially, the storage time of modified pitch does not exceed generally 24 hours, and storage temperature is at 150 ~ 160 DEG C.

The present invention has following advantages and characteristic：

(1) preparation process is simple, at low cost；

(2) flow time is short, easily mass produces.

Specific embodiment

Embodiment one：

First 10kg matrix pitches from de- bucket device are squeezed into asphalt heating tank, and heated, asphalt temperature is made to be raised to 120 DEG C, when pitch is heated to stop bubbling, stop heating, and pitch is poured into an agitator tank, then added into agitator tank The sulphur of 0.2kg and the SBS of 0.3kg restart the switch of blender, add the ethylene-propylene of 0.3kg in the case of stirring Acid esters is swollen, and the asphalt in agitator tank by colloid mill is ground one time and is driven into another agitator tank, is all ground Complete shutdown, then the asphalt gone over will be ground in the agitator tank ground one time by colloid mill and is driven into previous agitator tank, It so grinds 3 times altogether repeatedly, you can obtain a kind of modified asphalt material.

Embodiment two：

First 20kg matrix pitches from de- bucket device are squeezed into asphalt heating tank, and heated, asphalt temperature is made to be raised to 140 DEG C, when pitch is heated to stop bubbling, stop heating, and pitch is poured into an agitator tank, then added into agitator tank The sulphur of 0.7kg and the SBS of 0.8kg restart the switch of blender, add the ethylene-acrylic acid of 1kg in the case of stirring Ester is swollen, and the asphalt in agitator tank by colloid mill is ground one time and is driven into another agitator tank, has all been ground It shuts down, then the asphalt gone over will be ground in the agitator tank is ground one time by colloid mill and is driven into previous agitator tank, such as This grinds 4 times altogether repeatedly, you can obtains a kind of modified asphalt material.

Embodiment three：

First 50kg matrix pitches from de- bucket device are squeezed into asphalt heating tank, and heated, asphalt temperature is made to be raised to 160 DEG C, when pitch is heated to stop bubbling, stop heating, and pitch is poured into an agitator tank, then added into agitator tank The sulphur of 2.5kg and the SBS of 2.5kg restart the switch of blender, add the ethylene-acrylic acid of 3kg in the case of stirring Ester is swollen, and the asphalt in agitator tank by colloid mill is ground one time and is driven into another agitator tank, has all been ground It shuts down, then the asphalt gone over will be ground in the agitator tank is ground one time by colloid mill and is driven into previous agitator tank, such as This grinds 5 times altogether repeatedly, you can obtains a kind of modified asphalt material.

Claims

1. a kind of preparation process for the modified asphalt material for adding ethylene-acrylate, it is characterised in that the preparation process is by such as Lower step carries out：

(4) start blender, add suitable ethylene-acrylate, be swollen；

2. a kind of preparation process of modified asphalt material for adding ethylene-acrylate as described in claim 1, feature exist In, step (1) in, heating temperature be 120-160 DEG C.

3. a kind of preparation process of modified asphalt material for adding ethylene-acrylate as described in claim 1, feature exist In, step (3) in, the additive amount of sulphur accounts for the 2-5% of matrix pitch weight.

4. a kind of preparation process of modified asphalt material for adding ethylene-acrylate as described in claim 1, feature exist In, step (3) in, the additive amount of SBS accounts for the 3-5% of matrix pitch weight.

5. a kind of preparation process of modified asphalt material for adding ethylene-acrylate as described in claim 1, feature exist In, step (4) in, the additive amount of ethylene-acrylate accounts for the 3-5% of matrix pitch weight.

6. a kind of preparation process of modified asphalt material for adding ethylene-acrylate as described in claim 1, feature exist In, step (6) in, repeatedly altogether grind 3-5 times.