CN108250769A

CN108250769A - A kind of dopen Nano Fe3O4Modified asphalt composite

Info

Publication number: CN108250769A
Application number: CN201611241464.7A
Authority: CN
Inventors: 岑祚师
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-29
Filing date: 2016-12-29
Publication date: 2018-07-06

Abstract

The invention discloses a kind of dopen Nano Fe₃O₄Modified asphalt composite.The composition is using matrix pitch as raw material, in process engineering, other than addition SBS modifier and poly- sulfur modifier, also adds nanometer Fe₃O₄Powder, due to nanometer Fe₃O₄It is minimum with grain size so that miscible system is uniformly and stable, and suitable for production application, the comprehensive performance of modified bituminous composition is greatly improved.

Description

A kind of dopen Nano Fe3O4Modified asphalt composite

Technical field

The present invention relates to a kind of road asphalt, more particularly to a kind of addition nanometer Fe₃O₄The pitch of modifying agent and its preparation work Skill 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 using matrix pitch as raw material, in process engineering, in addition to addition SBS modifier and poly- sulfur modifier it Outside, nanometer Fe is also added₃O₄Powder, nanometer Fe₃O₄It is a miscible process of physics that powder, which is added to pitch, nanometer Fe₃O₄With drip A kind of intermolecular force is only existed between blueness, there is no chemical change occurs to generate new substance or group.But due to receiving Rice Fe₃O₄It is minimum with grain size so that miscible system is uniformly and stable, and suitable for production application, the comprehensive performance of pitch obtains significantly Raising.

Invention content

The object of the present invention is to provide a kind of modified asphalt composite and preparation method thereof, the preparation methods of the modified pitch It carries out as follows：

(1) a certain amount of matrix pitch raw material is first taken, and heating melting dehydration is carried out to it；

(2) after being dehydrated, i.e., not in bubbling, stop heating immediately, 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, increases system temperature, and use high cut disperse emulsification Machine is under certain rotating speed, shearing a period of time；

(4) and then suitable nanometer Fe is added₃O₄Powder continues shearing a period of time；

(5) carry out after mixing, being cooled to certain temperature and placing after a period of time to get a kind of modified asphalt composite.

As the present invention preferred embodiments, step (1) in, heating temperature be 150-180 DEG C.

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

As the present invention preferred embodiments, step (3) in, heating temperature be 170-190 DEG C.

As the present invention preferred embodiments, step (3) in, high-shearing dispersion emulsifying machine rotating speed is set as 3000- 5000r/min, shear time 0.5-1h.

As the present invention preferred embodiments, step (4) in, nanometer Fe₃O₄The additive amount of powder accounts for matrix pitch weight 3-5%.

As the present invention preferred embodiments, step (5) in, be cooled to 140-160 DEG C, standing time 0.5-1h.

The present invention has following advantages and characteristic：

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

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

(3) the modified pitch stability prepared is good.

Specific embodiment

Embodiment one：

The matrix pitch raw material of 10kg is first taken, and is heated to 150 DEG C and carries out melting dehydration, when pitch stops bubbling, is stopped It only heats, and pitch is poured into an agitator tank, then the SBS of the sulphur of addition 0.3kg and 0.3kg into agitator tank, increase body Be temperature to 170 DEG C, and with high-shearing dispersion emulsifying machine in the case where rotating speed is 3000r/min, shear 1h, then add 0.3kg again Nanometer Fe₃O₄Powder continues shearing 1h and is mixed, and system then is cooled to 140 DEG C and places 1h up to a kind of modified drip Green composition.

Embodiment two：

The matrix pitch raw material of 20kg is first taken, and is heated to 160 DEG C and carries out melting dehydration, when pitch stops bubbling, is stopped It only heats, and pitch is poured into an agitator tank, then the SBS of the sulphur of addition 0.8kg and 0.8kg into agitator tank, increase body Be temperature to 180 DEG C, and with high-shearing dispersion emulsifying machine in the case where rotating speed is 4000r/min, shear 0.7h, then add 1 kg again Nanometer Fe₃O₄Powder continues to shear 0.7h being mixed, is then cooled to 150 DEG C and places 0.7h system and change up to one kind Property bituminous composition.

Embodiment three：

The matrix pitch raw material of 50kg is first taken, and is heated to 180 DEG C and carries out melting dehydration, when pitch stops bubbling, is stopped It only heats, and pitch is poured into an agitator tank, then the SBS of the sulphur of addition 2.5kg and 2.5kg into agitator tank, increase body Be temperature to 190 DEG C, and with high-shearing dispersion emulsifying machine in the case where rotating speed is 5000r/min, shear 05h, then add 2.5kg again Nanometer Fe₃O₄Powder continues 0.5 h of shearing and is mixed, and system then is cooled to 160 DEG C and places 0.5h up to a kind of Modified asphalt composite.

Claims

1. a kind of dopen Nano Fe₃O₄Modified asphalt composite, it is characterised in that the preparation process of the modified asphalt composite presses Following steps carry out：

2. a kind of dopen Nano Fe as described in claim 1₃O₄Modified asphalt composite, which is characterized in that in step (1) In, heating temperature is 150-180 DEG C.

3. a kind of dopen Nano Fe as described in claim 1₃O₄Modified asphalt composite, which is characterized in that in step (3) In, the additive amount of sulphur accounts for the 3-5% of matrix pitch weight, and the additive amount of SBS accounts for the 3-5% of matrix pitch weight.

4. a kind of dopen Nano Fe as described in claim 1₃O₄Modified asphalt composite, which is characterized in that step (3) in, Heating temperature is 170-190 DEG C.

5. a kind of dopen Nano Fe as described in claim 1₃O₄Modified asphalt composite, which is characterized in that in step (3) In, high-shearing dispersion emulsifying machine rotating speed is set as 3000-5000r/min, shear time 0.5-1h.

6. a kind of dopen Nano Fe as described in claim 1₃O₄Modified asphalt composite, which is characterized in that in step (4) In, nanometer Fe₃O₄The additive amount of powder accounts for the 3-5% of matrix pitch weight.

7. as described in claim a kind of dopen Nano Fe₃O₄Modified asphalt composite, which is characterized in that step (5) in, 140-160 DEG C is cooled to, standing time 0.5-1h.