CN105647201A

CN105647201A - Modified asphalt stabilizer and preparation method thereof

Info

Publication number: CN105647201A
Application number: CN201610051262.XA
Authority: CN
Inventors: 康武; 高宇; 王春江; 吕为勇; 游丽; 谢彬; 李化宇
Original assignee: Zhonghai Asphalt (sichuan) Co Ltd
Current assignee: Zhonghai Asphalt (sichuan) Co Ltd
Priority date: 2016-01-26
Filing date: 2016-01-26
Publication date: 2016-06-08

Abstract

The invention discloses a modified asphalt stabilizer and a preparation method thereof. The stabilizer is prepared from, by weight, 20-40% of elemental sulfur, 10-20% of organic sulfur, 20-40% of rubber oil, 20-35% of 200# asphalt and 1-5% of dispersing agent. The prepared stabilizer is in a liquid state. Compared with a traditional solid modified asphalt stabilizer, the modified asphalt stabilizer can be combined with all kinds of different modified asphalt products more easily, the stability of modified asphalt can be improved, and storage and long-distance transportation of the modified asphalt can be benefited better.

Description

A kind of modified asphalt stabilizer and preparation method thereof

Technical field

The present invention relates to a kind of stabilizer, be specifically related to a kind of modified asphalt stabilizer and preparation method thereof.

Background technology

Modified pitch is applied to high-grade highway more and more widely with its excellent pavement performance, is intended to produce the modified pitch of high-quality, add stabilizer it is critical that. Modified pitch is as dispersion phase by high molecular polymer modifying agent, is distributed to, with certain uniform particle sizes, the system constituted in the continuous phase of matrix pitch by the method for physics. Owing to high molecular polymer modifying agent and the molecular weight of matrix pitch, solubility parameter and polarity aspect are all very different, only exist between them partly absorption, compatible, and and non-fully melt. This structure belongs to thermodynamic instability structure, very easily occur biphase between separation, thus causing segregation phenomenon. The storage stability that plant layout is produced modified pitch by this unstability is disadvantageous, especially more serious during long-distance transport. When modified pitch produces and transports, once external force fails, modifying agent will separate from Colophonium and float on surface aggregation, form the coarse epidermis of larger particles, basic reason is exactly the problem of basic asphalt and the compatibility of modifying agent, if both compatibilitys are bad or insufficient compatible, then matrix pitch will separate with modifying agent, makes the quality of modified pitch and technical specification be subject to serious impact. But after with the addition of modified asphalt stabilizer, problem is just readily solved, so how developing a kind of efficient stabilizer is the technical difficult problem that a urgent need solves now.

Domestic but without the special producer producing liquid stabilizer at present, the producer of domestic production stabilizer is mainly based on solid state stability agent; The liquid stabilizer of import is expensive, price per ton about 27500 yuan/ton, and procurement cycle is longer.

Summary of the invention

For above-mentioned Problems existing, it is an object of the invention to provide a kind of liquid modified asphalt stabilizer. Stabilizer provided by the invention is strong with the binding ability of modified pitch, and production cost is low.

For achieving the above object, the present invention adopts technical scheme as follows:

A kind of modified asphalt stabilizer, stabilizer component is made up of elemental sulfur, organic sulfur, rubber oil, 200# Colophonium, dispersant, and its each weight percentages of components is elemental sulfur: 20%-40%, organic sulfur: 10%-20%, rubber oil: 20%-40%, 200# Colophonium: 20%-35%, dispersant: 1%-5%.

As preferably: each weight percentages of components is elemental sulfur: 25%, organic sulfur: 15%, rubber oil: 38%, 200# Colophonium: 20%, dispersant: 2%.

Described organic sulfur one in sodium polysulphide, potassium polysulfide.

A kind of preparation method of modified asphalt stabilizer, elemental sulfur and organic sulfur species are crushed to 300 orders, disperse with rubber oil mix and blend, in homogeneously dispersed state, adding 200# Colophonium and be in harmonious proportion uniformly, controlling mediation temperature is 70��90 DEG C, is eventually adding dispersant and stirs, form the aqueous suspension of a kind of stable physical blending, obtain liquid stabilizer.

As preferably: above-mentioned mediation temperature is 80 DEG C.

Described rubber oil, 200# Colophonium utilize atmospheric and vacuum distillation unit to separate from crude oil according to its boiling point, and wherein rubber oil is the fragrant oil product of the fragrance containing 60-80%; Described dispersant is containing amine anchoring group high molecular polymer, and manufacturer is WinBos New Materials Co., Ltd..

When modified asphalt stabilizer enters the 0.30%-0.40% that amount is stabilizer and modified pitch gross mass, the modified pitch aggregative indicator produced is best, production cost is minimum, meets the requirement in JTGF40-2004 " standard specification for construction and acceptance of highway asphalt pavement " and U.S.'s SHRPPG76-22 standard simultaneously.

As preferably: when modified asphalt stabilizer enter amount be stabilizer with the 0.35% of modified pitch gross mass time, the modified pitch aggregative indicator of production is best, and production cost is minimum.

Beneficial effect

Elemental sulfur in stabilizer formula prepared by the present invention well can be formed cross-link with modified pitch, but reaction is acutely, is easily generated excessive crosslinking, reduces the ductility of modified pitch; Organic sulfur reaction is relatively mild, and cross-linking effect is fine; The interworking of two kinds of cross-linking agent can better improve modified asphalt cross-linking effect and steady quality, and adding 200# Colophonium can increase elemental sulfur and the organic sulfur mixing uniformity in liquid and existence and stability; The addition of rubber oil can make this product keep liquid, it is simple to adds uniformly, can promote the ductility performance of modified pitch simultaneously; The addition of dispersant is to maintain solid matter scattered stability and uniformity in liquid.

Stabilizer prepared by the present invention produces reactive radical species under certain temperature conditions, cross-linked graft is there is with polymer molecular chain, activity of bitumen functional group, polymer and Colophonium is made to form stable colloidal dispersion, thus improve the heat stability of modified pitch, solve the problems of stability in storage of modified pitch.

Stabilizer prepared by the present invention is owing to being liquid, can more rapid be integrated into uniformly in modified pitch, compared with conventional solid-state stabilizer, be combined with modified pitch and be easier to, improve the stability of modified pitch, the modified pitch advantageously produced in plant layout stores and long-distance transport, it is with low cost that the present invention prepares stabilizer, draw materials conveniently, can with various different formulations, the modified bitumen product of label combines, the solid state stability agent commonly used in surrogate and expensive import liquid stabilizer, reduce production cost, and break the corner on the market of external liquid stabilizer.

Detailed description of the invention

Embodiment 1:

A kind of modified asphalt stabilizer, it is made up of elemental sulfur, sodium polysulphide, rubber oil, 200# Colophonium and dispersant, its each weight percentages of components is elemental sulfur: 25%, sodium polysulphide: 15%, rubber oil: 35%, 200# Colophonium: 21%, dispersant: 4%, its preparation method is: elemental sulfur, sodium polysulphide material are crushed to 200 orders, with rubber oil dispersed with stirring, in homogeneously dispersed state, add dispersant after putting into the mediation uniformly of 200# Colophonium to stir, controlling mediation temperature is 70 DEG C, form the float of physical blending, obtain liquid stabilizer.

Embodiment 2:

A kind of modified asphalt stabilizer, by elemental sulfur, potassium polysulfide, rubber oil, 200# Colophonium, dispersant forms, and its each weight percentages of components is elemental sulfur: 25%, potassium polysulfide: 15%, rubber oil: 30%, 200# Colophonium: 28%, dispersant: 2%; Its preparation method is: elemental sulfur, potassium polysulfide material are crushed to 200 orders, and rubber oil dispersed with stirring, in homogeneously dispersed state, add dispersant after putting into the mediation uniformly of 200# Colophonium to stir, controlling mediation temperature is 90 DEG C, forms the float of physical blending, obtains liquid stabilizer.

Embodiment 3:

A kind of modified asphalt stabilizer, by elemental sulfur, sodium polysulphide, rubber oil and 200# Colophonium, dispersant forms, and its each weight percentages of components is elemental sulfur: 25%, sodium polysulphide: 15%, rubber oil: 35%, 200# Colophonium: 23%, dispersant: 2%; Its preparation method is: elemental sulfur, sodium polysulphide material are crushed to 200 orders, and rubber oil dispersed with stirring, in homogeneously dispersed state, add dispersant after putting into the mediation uniformly of 200# Colophonium to stir, controlling mediation temperature is 80 DEG C, forms the float of physical blending, obtains liquid stabilizer.

Claims

1. a modified asphalt stabilizer, it is characterized in that: stabilizer component is made up of elemental sulfur, organic sulfur, rubber oil, 200# Colophonium, dispersant, its each weight percentages of components is elemental sulfur: 20%-40%, organic sulfur: 10%-20%, rubber oil: 20%-40%, 200# Colophonium: 20%-35%, dispersant: 1%-5%.

2. a kind of modified asphalt stabilizer according to claim 1, it is characterised in that: each weight percentages of components is elemental sulfur: 25%, organic sulfur: 15%, rubber oil: 38%, 200# Colophonium: 20%, dispersant: 2%.

3. a kind of modified asphalt stabilizer according to claim 1 and 2, it is characterised in that: described organic sulfur one in sodium polysulphide, potassium polysulfide.

4. the preparation method of a kind of modified asphalt stabilizer described in 1 as requested, it is characterized in that: elemental sulfur and organic sulfur species are crushed to 300 orders, disperse with rubber oil mix and blend, in homogeneously dispersed state, adding 200# Colophonium and be in harmonious proportion uniformly, controlling mediation temperature is 70��90 DEG C, is eventually adding dispersant and stirs, form the aqueous suspension of a kind of stable physical blending, obtain liquid stabilizer.

5. the preparation method of a kind of modified asphalt stabilizer according to claim 4, it is characterised in that: the temperature that is in harmonious proportion is 80 DEG C.