CN103408954B - A kind of SBS modified asphalt stabilizer - Google Patents

Abstract

The present invention relates to a kind of SBS modified asphalt stabilizer, this stablizer is made up of the raw material of following weight per-cent: SULPHUR POWDER 60 ~ 65%, asbestos plaster 20%, light calcium carbonate 10%, carbon black 5 ~ 10%.Meanwhile, the invention also discloses the preparation method of this stablizer.The present invention can effectively prevent modifying asphalt from emanating by chemical reaction and physical action, and delays its performance degradation.

Description

A kind of SBS modified asphalt stabilizer

Technical field

The present invention relates to modified asphalt additive technical field, particularly relate to a kind of SBS modified asphalt stabilizer.

Background technology

Modifying asphalt is comparatively large due to pitch and the properties-correcting agent physical difference opposite sex, in thermmal storage process, is easy to cause segregation phenomenon to occur, and mixes stablizer to improve this situation outside needing for this reason.Modified asphalt stabilizer is the one trace additive for pitch, current a part of modified asphalt stabilizer all just improves stability in storage by adding sulphur simple substance, another part is then the convenience that take into account stablizer interpolation, adds high aromatic hydrocarbons viscous crude or utilizes water baseization method etc. can reduce the liquid stabilizer of interfacial energy.Though add aforementioned stable agent can reach the object improving stability in storage, cannot improve or delay the performance degradation in modifying asphalt thermmal storage process.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of SBS modified asphalt stabilizer preventing modifying asphalt segregation, delay its performance degradation.

For solving the problem, a kind of SBS modified asphalt stabilizer of the present invention, is characterized in that: this stablizer is made up of the raw material of following weight per-cent: SULPHUR POWDER 60 ~ 65%, asbestos plaster 20%, light calcium carbonate 10%, carbon black 5 ~ 10%.

Fineness >=250 order of described SULPHUR POWDER.

The fineness of described asbestos plaster is the sieve aperture surplus that 0.15mm sieve aperture surplus is not more than 5%, 0.09mm is between 10 ~ 30%.

Fineness >=500 order of described light calcium carbonate.

The fineness of described carbon black is Nano grade.

The preparation method of a kind of SBS modified asphalt stabilizer as above, comprises the following steps:

(1) weigh by proportioning;

(2), by after asbestos plaster, light calcium carbonate, carbon black mixing, stir with the speed of 400 ~ 450 revs/min and make it mix in 5 ~ 8 minutes, obtain mixture, this mixture is dried to constant weight at 30 ~ 40 DEG C of temperature, obtains dry mixture;

(3) SULPHUR POWDER is dried to constant weight at 30 ~ 35 DEG C of temperature, obtain dry SULPHUR POWDER;

(4), after described dry mixture being mixed with the SULPHUR POWDER of described drying, stir with the speed of 450 ~ 550 revs/min and make it mix in 10 ~ 15 minutes, finally encapsulate after the assay was approved according to a conventional method and get final product.

The present invention compared with prior art has the following advantages:

1, the present invention is by chemical reaction and physical action, microcosmic produces coordinate bond and molecule grafting, by forming the stable of branched structure maintenance system between SBS and pitch, the employing chemistry simple compared to other or physics way, have more stable, act on efficiently.

2, SULPHUR POWDER is added with in the present invention, utilize the unoccupied orbital outside sulphur atom, the residual carbon-carbon double bond of hexadiene in SBS, reduce low cloud density, make carbon-carbon double bond unstable and form chemical covalent bonds with sulphur atom, finally make SBS form inierpeneirating network structure in pitch by mutual reaction, thus make SBS modifying asphalt form more stable colloidal structure.

3, be added with asbestos plaster in the present invention, this asbestos plaster itself has nonpolar feature, can be adjacent to each other with SBS, finally can dissolve wherein preferably.

4, be added with light calcium carbonate in the present invention, this light calcium carbonate can be attached on SBS, improves SBS density, SBS can be suspended in the middle of pitch, play physically stable.

5, be added with nano level carbon black in the present invention, utilize the principle of its black light-absorbing, play a part painted, its stable structure can also be utilized to reach aging-resistant object simultaneously, emanate to prevent modifying asphalt, delay its performance degradation.

6, the present invention tests through reality, meets relevant national regulations.

1. 500gSK-90 matrix pitch is warming up to 160 DEG C, add the extraction provided by the Shandong mountain company oil of 1.0% successively, the model of 3.6% is YH1301-1SBS, then is warming up to 180 DEG C, with moral FULCK model AH-2 emulsify at a high speed shears, shear 35 minutes, add product of the present invention, then after shearing 5 minutes, putting into temperature is inside the baking oven of 175 DEG C, carry out segregation experiment according to JTG-2011-56, the add-on of this product is respectively 1 ‰, 1.5 ‰ and 2 ‰, and result is as shown in table 1.

Table 1 dosage experiments result

As can be found from Table 1, modifying asphalt is under thermmal storage condition, and after static 48 hours, the difference of upper and lower softening temperature is all less than 2.5 DEG C of current national codes requirement.

2. adopt shell No. 90 pitches, No. 90, Zhenghai pitch and Esso No. 90 pitches respectively, according to above-mentioned way sample preparation 1. and test, test result is as shown in table 2.

Table 2 different pitches Experimental comparison

Segregation experiment according to table 2 can find, product of the present invention is all applicable for shell No. 90 pitches, No. 90, Zhenghai pitch and Esso No. 90 pitches, meets the requirement being less than 2.5 DEG C that specification allows.

7, preparation technology of the present invention is simple, with low cost.

Embodiment

embodiment 1a kind of SBS modified asphalt stabilizer, this stablizer is made up of the raw material of following weight per-cent (kg/kg): SULPHUR POWDER 60%, asbestos plaster 20%, light calcium carbonate 10%, carbon black 10%.

The preparation method of this SBS modified asphalt stabilizer, comprises the following steps:

(1) weigh by proportioning.

(2), by after asbestos plaster, light calcium carbonate, carbon black mixing, stir with the speed of 400 ~ 450 revs/min and make it mix in 5 ~ 8 minutes, obtain mixture, this mixture is dried to constant weight at 30 ~ 40 DEG C of temperature, obtains dry mixture.

(3) SULPHUR POWDER is dried to constant weight at 30 ~ 35 DEG C of temperature, obtain dry SULPHUR POWDER.

(4), after dry mixture being mixed with dry SULPHUR POWDER, stir with the speed of 450 ~ 550 revs/min and make it mix in 10 ~ 15 minutes, finally encapsulate after the assay was approved according to a conventional method and get final product.

embodiment 2a kind of SBS modified asphalt stabilizer, this stablizer is made up of the raw material of following weight per-cent (kg/kg): SULPHUR POWDER 65%, asbestos plaster 20%, light calcium carbonate 10%, carbon black 5%.

The preparation method of this SBS modified asphalt stabilizer is same embodiment 1.

embodiment 3a kind of SBS modified asphalt stabilizer, this stablizer is made up of the raw material of following weight per-cent (kg/kg): SULPHUR POWDER 62%, asbestos plaster 20%, light calcium carbonate 10%, carbon black 8%.

The preparation method of this SBS modified asphalt stabilizer is same embodiment 1.

embodiment 4a kind of SBS modified asphalt stabilizer, this stablizer is made up of the raw material of following weight per-cent (kg/kg): SULPHUR POWDER 61%, asbestos plaster 20%, light calcium carbonate 10%, carbon black 9%.

The preparation method of this SBS modified asphalt stabilizer is same embodiment 1.

embodiment 5a kind of SBS modified asphalt stabilizer, this stablizer is made up of the raw material of following weight per-cent (kg/kg): SULPHUR POWDER 64%, asbestos plaster 20%, light calcium carbonate 10%, carbon black 6%.

The preparation method of this SBS modified asphalt stabilizer is same embodiment 1.

Above-mentioned embodiment 1 ~ 5, fineness>=250 order of SULPHUR POWDER; The fineness of asbestos plaster is the sieve aperture surplus that 0.15mm sieve aperture surplus is not more than 5%, 0.09mm is between 10 ~ 30%; Fineness>=500 order of light calcium carbonate; The fineness of carbon black is Nano grade.

Claims (1)

1. a SBS modified asphalt stabilizer, is characterized in that: this stablizer is made up of the raw material of following weight per-cent: SULPHUR POWDER 60 ~ 65%, asbestos plaster 20%, light calcium carbonate 10%, carbon black 5 ~ 10%; Fineness >=250 order of described SULPHUR POWDER; The fineness of described asbestos plaster is the sieve aperture surplus that 0.15mm sieve aperture surplus is not more than 5%, 0.09mm is between 10 ~ 30%; Fineness >=500 order of described light calcium carbonate; The fineness of described carbon black is Nano grade;

itspreparation method, comprises the following steps:

(1) weigh by proportioning;

(2), by after asbestos plaster, light calcium carbonate, carbon black mixing, stir with the speed of 400 ~ 450 revs/min and make it mix in 5 ~ 8 minutes, obtain mixture, this mixture is dried to constant weight at 30 ~ 40 DEG C of temperature, obtains dry mixture;

(3) SULPHUR POWDER is dried to constant weight at 30 ~ 35 DEG C of temperature, obtain dry SULPHUR POWDER;

(4), after described dry mixture being mixed with the SULPHUR POWDER of described drying, stir with the speed of 450 ~ 550 revs/min and make it mix in 10 ~ 15 minutes, finally encapsulate after the assay was approved according to a conventional method and get final product.