CN102206063A

CN102206063A - Styrene-butadiene rubber plastic modified asphalt mixture and manufacturing method thereof

Info

Publication number: CN102206063A
Application number: CN2011100640019A
Authority: CN
Inventors: 刘拓瑜; 孙晓刚; 张荣辉; 周传捷
Original assignee: DONGGUAN HIGHWAY BRIDGE DEVELOPMENT CONSTRUCTION GENERAL CO LTD
Current assignee: DONGGUAN HIGHWAY BRIDGE DEVELOPMENT CONSTRUCTION GENERAL CO LTD
Priority date: 2011-03-16
Filing date: 2011-03-16
Publication date: 2011-10-05

Abstract

A styrene-butadiene rubber plastic modified asphalt mixture and a manufacturing method thereof. The asphalt mixture consists of components of No.70 road asphalt, a mixing aggregate which comprises broken stones, sand grains and powder and meets the JTG F40-2004 standard, a styrene-butadiene rubber emulsion (with a structural formula of R-CH=CH2, wherein R represents hydrogen, alkyl group, alkylene, cycloalkyl, alkyloxy group, aryl group or cycloalkoxy group, and a market polypropylene PP micelles. The manufacturing method comprises the following steps: first preparing materials of the aggregate, the asphalt, the styrene-butadiene rubber emulsion and the polypropylene PP micelles according to respective portions; then adding the preheated 180DEG C aggregate into a mixer, and adding the polypropylene PP micelles for dry mixing; then adding a 160 DEG C hot melt asphalt and continuing to stir uniformly, and adding the styrene-butadiene rubber emulsion and continuing to stir uniformly. The invention combines advantages of both the styrene-butadiene rubber emulsion and the polypropylene. Modified by a dry method, the asphalt has good tensile property at a low temperature and a high rutting-resistance at a high temperature, and is suitable for asphalt pavements with extremely heavy traffic.

Description

The asphalt and the manufacture method thereof of the modification of a kind of butylbenzene rubber and plastic

Technical field

The present invention relates to a kind of modified asphalt mixture and manufacture method thereof, be meant a kind of synthetic asphalts compound and manufacture method of using through the suitable very heavy traffic amount of butylbenzene rubber and plastic modification thereof especially.

Background technology

SBR modified pitch is the asphalt highway materials used.SBR modified pitch has good toughness and low temperature ductility, but styrene-butadiene rubber(SBR) (SBR) is subjected to high temperature (180 ℃) damage in modifying process, and the rut performance of its compound only improves 1 times than protobitumen.Adopt the pitch of styrene-butadiene emulsion modification to have good crack resistance at low-temperature, ductility exceeds several times than plain asphalt in the time of 5 ℃; But its softening temperature does not have to change substantially.Pp (polypropylene) properties-correcting agent increases significantly for the bituminous softening temperature, and the anti-rut performance of its corresponding compound can improve more than 5 times than plain asphalt compound, but low-temperature performance and self-healing performance are not ideal.Which can integrate these two kinds of materials advantage separately?

Summary of the invention

The problem that the present invention need solve provides a kind of defective that overcomes above-mentioned prior art, separately advantage of union SBR modified pitch and pp modifying asphalt, adopts dry method modification, does not need additionally to increase production machinery, does not change the asphalt of the butylbenzene rubber and plastic modification of traditional asphalt production technique.Another object of the present invention provides the manufacture method of the asphalt of a kind of aforementioned butylbenzene rubber and plastic modification.

Designed the asphalt of a kind of butylbenzene rubber and plastic modification according to the above-mentioned problem that need solve, by component pitch, gather materials, SBR emulsion and polypropylene PP micelle form, the parts by weight of described each component are: gather materials 100 parts, 4.5～5.5 parts of pitches; SBR emulsion is 2～5% of a pitch umber, polypropylene PP is 3～7% of a pitch umber.Wherein, described gathering materials mixed the compound of forming for what meet " asphalt highway construction technique normalizing " JTG F40-2004 by rubble, sand grains and powder, and pitch is No. 70 bi tumenf orr oads.The molecular structure skeleton symbol of described SBR emulsion is R-CH=CH2, and R represents hydrogen, alkyl, alkylene, cycloalkyl, alkoxyl group, aryl or cycloalkyloxy in the formula, and polypropylene PP micelle is the common commercial product.

Manufacture method at butylbenzene rubber plastics modified bitumen compound provided by the invention is, at first by umber to gather materials, pitch, SBR emulsion, polypropylene PP micelle gets the raw materials ready respectively; To be preheated to then and drop in the stirrer 180 ℃ gather materials, add polypropylene PP micelle dry mixing 10 seconds to 1 minute then; Again in continue stirring gather materials and polypropylene PP micelle dry mixing material in add 160 ℃ hot-melt asphalt and continue to stir, then add again SBR emulsion stir and continue stirring more than 30 seconds until evenly, promptly obtain the asphalt of butylbenzene rubber and plastic modification.

These two kinds of materials of Asphalt Mixture Design scheme collection SBR emulsion provided by the invention and polypropylene advantage separately adopts dry method modification, does not need additionally to increase production machinery, does not change traditional asphalt production technique; Therefore its maximum characteristics are that the low temperature tensile property is good, and high temperature rutting resistance height can be applicable to the bituminous road road surface under the very heavy traffic amounts such as motorway of urban intersection road surface, long slope section.

Embodiment

The present invention designed a kind of by component pitch, gather materials, the asphalt of butylbenzene rubber and plastic modification that SBR emulsion and polypropylene PP micelle are formed, its basic design scheme be described asphalt by component pitch, gather materials, SBR emulsion and polypropylene PP micelle form.Wherein, the parts by weight of each component are: gather materials 100 parts, 4.5～5.5 parts of pitches, SBR emulsion are 2～5% of pitch umber, and polypropylene PP is 3～7% of a pitch umber.

At this, gather materials and mix the compound of forming by rubble, sand grains and powder for what meet " asphalt highway construction technique normalizing " JTG F40-2004; Pitch is No. 70 bi tumenf orr oads; The molecular structure skeleton symbol of SBR emulsion is R-CH=CH2, and R represents hydrogen, alkyl, alkylene, cycloalkyl, alkoxyl group, aryl or cycloalkyloxy in the formula; Polypropylene PP micelle is the common commercial product, English Polypropylene by name (abbreviation PP), density: 0.9～0.91g/cm ³, molding shrinkage 1.0～2.5%, mold temperature: 160～220 ℃ is a kind of hemicrystalline thermoplastics.

Manufacture method at butylbenzene rubber plastics modified bitumen compound provided by the invention is, at first by umber to gather materials, pitch, SBR emulsion, polypropylene PP micelle gets the raw materials ready respectively; To be preheated to then and drop in the stirrer 180 ℃ gather materials, add polypropylene PP micelle dry mixing 10 seconds to 1 minute then; Again in continue stirring gather materials and polypropylene PP micelle dry mixing material in add 160 ℃ hot-melt asphalt and continue to stir and then add again SBR emulsion stir and continue stirring more than 30 seconds until evenly, promptly obtain the asphalt of butylbenzene rubber and plastic modification.The invention will be further described below in conjunction with embodiment.

Embodiment 1.This embodiment also is the scheme of preferably getting the raw materials ready of the present invention.The proportion scale of described each component is, gathers materials: pitch=100: 5.2, pitch: SBR emulsion: polypropylene PP=1: 0.03: 0.05.

Embodiment 2.The proportion scale of described each component is, gathers materials: pitch=100: 4.5, pitch: SBR emulsion: polypropylene PP=1: 0.02: 0.03.

Embodiment 3.The proportion scale of described each component is, gathers materials: pitch=100: 5.5, pitch: SBR emulsion: polypropylene PP=1: 0.05: 0.07.

Embodiment 4.The proportion scale of described each component is, gathers materials: pitch=100: 5.0, pitch: SBR emulsion: polypropylene PP=1: 0.035: 0.055.

The construction technology and the hot-mix asphalt mixture of butylbenzene rubber plastics modified bitumen compound of the present invention are basic identical, but the control of the temperature in each stage is different, is embodied in following a few stage:

The compound drop temperature is 175 ℃, and the temperature that paves is not less than 160 ℃;

First pressing begins temperature and is not less than 150 ℃, and the surface temperature that rolls end of a period is 100 ℃.

The present invention is adding polypropylene PP as properties-correcting agent, and it adds softening temperature and the anti-rut performance of high temperature of obviously having improved pitch and compound thereof.For the dynamic stability that improves the SBR modified asphalt with decide stability and have greatly and contribute, significantly improved the work-ing life and the pavement performance of road under the hot conditions.Simultaneously, butylbenzene has obviously improved the low-temperature flexibility and the ductility of asphalt as the adding of properties-correcting agent.The self-healing of its asphalt is greatly improved; Has greatly contribution for the crack resistance at low-temperature that improves pp (polypropylene) modified asphalt mixture, the road surface that the enough this modified asphalt mixtures of energy are mated formation has superior anti-water damage property, has improved more than 2 times than butylbenzene (SBR) modified asphalt mixture.

Every performance index of the present invention and common hot-mix asphalt mixture are compared as follows:

The every performance index comparison sheet of table 1

Annotate: the pitch that adopts in this table is 70 ^NumberPetroleum pitch.Asphalt is the AC-13 of GB regulation.In the SBR modified pitch, the volume of SBR emulsion is 3% of a pitch umber.In butylbenzene-pp synthetic asphalts, the volume of SBR emulsion is 3% of a pitch umber, and PP (polypropylene) volume is 5% of a pitch umber.

Claims

1. the asphalt of butylbenzene rubber and plastic modification, by component pitch, gather materials, SBR emulsion and polypropylene PP micelle form, the parts by weight of described each component are:

Gather materials 100 parts, 4.5～5.5 parts of pitches,

SBR emulsion is 2～5% of a pitch umber, and polypropylene PP is 3～7% of a pitch umber.

2. the asphalt of butylbenzene rubber and plastic according to claim 1 modification is characterized in that: described gathering materials mixed the compound of forming for what meet " asphalt highway construction technique normalizing " JTG F40-2004 by rubble, sand grains and powder.

3. the asphalt of butylbenzene rubber and plastic according to claim 2 modification is characterized in that: described pitch is No. 70 bi tumenf orr oads.

4. the asphalt of butylbenzene rubber and plastic according to claim 3 modification is characterized in that: the molecular structure skeleton symbol of described SBR emulsion is R-CH=CH2, and R represents hydrogen, alkyl, alkylene, cycloalkyl, alkoxyl group, aryl or cycloalkyloxy in the formula.

5. according to the manufacture method of the asphalt of each described butylbenzene rubber and plastic modification in the claim 1 to 4, it is characterized in that:

By umber to gather materials, pitch, SBR emulsion, polypropylene PP micelle gets the raw materials ready respectively;

Drop in the stirrer 180 ℃ gather materials being preheated to, add polypropylene PP micelle dry mixing 10 seconds to 1 minute then;

In continue stirring gather materials and polypropylene PP micelle dry mixing material in add 160 ℃ hot-melt asphalt and continue to stir, then add again SBR emulsion stir and continue stirring more than 30 seconds until evenly, promptly obtain the asphalt of butylbenzene rubber and plastic modification.

6. the manufacture method of the asphalt of butylbenzene rubber and plastic according to claim 5 modification is characterized in that: the ratio of each component is in the described scheme of preferably getting the raw materials ready,

Gather materials: pitch=100: 5.2, pitch: SBR emulsion: polypropylene PP=1: 0.03: 0.05.