CN105314929A - Novel color asphalt mixture and preparation method thereof - Google Patents

Abstract

The invention provides a novel color asphalt mixture, which is composed of color asphalt cementing agent, pigment, and aggregates. The aggregates comprise coarse aggregates and fine aggregates. The color powder is organic. The color asphalt cementing agent comprises 100 parts of petroleum resin, 80 to 120 parts of extract oil, 5 to 10 parts of polyethylene wax, and 0.1 to 2 parts of thermoplastic acrylic resin. By simultaneously adding polyethylene wax and thermoplastic acrylic resin into the color asphalt cementing agent, the dispersity and durability of pigment can be improved; and moreover the properties of provided color asphalt mixture can reach or even exceed the properties of black asphalt mixture, such as loose property, compactability, primary strength, strength after moulding, water damage resistant performance, and the like.

Description

A kind of new type colorful asphalt and preparation method thereof

Technical field

The present invention relates to a kind of new type colorful asphalt and preparation method thereof, belong to building material field.

Background technology

The identifiability of urban road can produce material impact to the behavior of people, and identifiability is the important content of urban road traffic safety.Colorful Asphalt Pavement can divide between commuter zone of different nature by colour-change, and this is very favorable to traffic safety.At present, colored road surface Yi highway, cycle track, sidewalk, bus special line, walking area, square and family expenses track are widely used, good effect is served to beautifying urban environment and traffic organization.

The Colorful Asphalt Pavement in past adopts common decolouring asphaltic products. mostly, poor to the dispersing property of pigment, pavement performance is poor, pavement cracking is serious; Color fastness is poor, fade in road surface seriously, and effect is not fully up to expectations.At present, many patents and document is had to disclose various chromatic bituminous cement, the suitability for industrialized production had, the technology disclosed by US4629754, US5340869, GB1226234, EP-A0179510, EP-A0330281.Chinese patent ZL03802619.X discloses a kind of colourable binder compositions for the synthesis of pitch, and described composition contains resin, lubricating oil and/or lubricating oil extract and amides additive; Chinese patent ZL93107531 discloses a kind of Binder for Colored Pavement, and its composition mainly comprises petroleum resin, SBS and lube oil finishing and extracts oil out.The principal feature of these patents is the synthetic asphalts adopting resin, lubricating oil and/or lube oil finishing to extract oil and a small amount of mixed with polymers formation colourable binder compositions out above.But, in these patents, all do not relate to the problems such as the bad dispersibility how solving pigment and poor durability.

Japanese Patent JPA2001-253988 describes the pigmentary resin that one has scarce (plate-out) characteristic of resistance to plate.It is a kind of phenomenon relevant to extrusion molding that plate lacks, and it can cause forming indentation and defect in moulding outward appearance.JPA2001-253988 discloses a kind of pigmentary resin and contains styrene base resin, pigment, lipid acid and metallic soap, described fatty acid amide and metallic soap add as dispersion agent, with described pigment dispersed among institute's resin, lack in order to preventing board and ensure examined, needing specific acid amides and metallic soap ratio.But these patents need when Specific construction to be heated high temperature, not only need a large amount of energy consumptions, and contaminate environment, constructional difficulties, also can not add the polymkeric substance of too much ratio in composition, limit the high-temperature stability of chromatic bituminous cement, be unfavorable for promoting the use of.Therefore, a kind of new chromatic bitumen mixture of development research is necessary very much.

Summary of the invention

The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of new type colorful asphalt is provided.

For achieving the above object, the present invention is by the following technical solutions:

A kind of new type colorful asphalt, is characterized in that, the raw material of described asphalt is made up of chromatic bituminous cement, pigment and gathering materials; Described gathering materials comprises coarse aggregate, fine aggregate; Described chromatic bituminous cement comprises the component of following weight part: petroleum resin 100 parts, extracts oily 80-120 part out, polyethylene wax 5-10 part, thermoplastic acrylic resin 15-20 part.

Described petroleum resin are C5/C9 copolymerized petroleum resin, C5/C9 copolymer resins is C5, C9 fraction of petroleum cracking institute by-product, through a kind of thermoplastic resin of the explained hereafter such as pre-treatment, polymerization, distillation, it is not superpolymer, but molecular weight is between the oligopolymer of 300-3000.Have the advantage of C5 petroleum resin and C9 petroleum resin concurrently, have acid number low, compatibility is good, and the characteristics such as water-fast, resistance to ethanol and chemicals-resistant, have chemically stable to soda acid, and has the feature regulating viscosity and Heat stability is good.Due to not polar functionalities in structure, therefore there are good water tolerance, resistance to acids and bases, weathering resistance and light fastness aging.Commercially available prod can be selected.Petroleum resin add the cohesiveness that can improve compound, improve storage characteristics, especially improve compound and use the stability at initial stage.

Described extraction oil is lube oil furfural refining extraction oil, and the kinematic viscosity at its 100 DEG C is 35-50Pa.S, flash-point is greater than 230 DEG C.Commercially available prod can be selected.

Described polyethylene wax (PE wax), also known as macromolecule wax, its weight-average molecular weight is 1500-3000.Commercially available prod can be selected.

The range of viscosities of described thermoplastic acrylic resin is 1000 ~ 2000cps (30 DEG C), can select commercially available prod.

The present invention adds thermoplastic acrylic resin and polyethylene wax in above-mentioned bituminous cements, not only greatly can reduce the mixing of chromatic bitumen mixture, pave and roll temperature, and can play the effective dissemination of pigment, painted chromatic bitumen mixture can be obtained.Meanwhile, the weather resistance of color can also greatly be improved.

In addition, the over-all properties of the present invention also by regulating the consumption of the bitumen aggregate ratio ratio of the weight of gathering materials (chromatic bituminous cement with), aggregate grading and breeze to improve chromatic bitumen mixture further.

Asphalt content directly affects asphalt membrane thickness, and asphalt membrane thickness directly has influence on a series of performance such as sponginess, compactibility, intensity, water stability of compound.When asphalt content is more, surface of aggregate asphalt membrane is thicker, and free pitch is more, easily bonds each other, and compound easily lumps agglomerating, also not easily breaks up after conglomeration.When asphalt content is less, be not enough to fully wrap surface of aggregate, bad adhesion between aggregate particle, roll and compound can not be made to form entirety, road surface easily occurs loose.Therefore, strictly asphalt content must be controlled.Through lot of experiments, the present invention determines that best bitumen aggregate ratio is 4-5%.

For improving supporting capacity and the surfaceness of compound, coarse aggregate described in the present invention and fine aggregate all select grouan, aggregate grading is: corresponding 100% percent of pass of 4.75mm sieve aperture, corresponding 72.5% percent of pass of 2.36mm sieve aperture, corresponding 50% percent of pass of 1.18mm sieve aperture, corresponding 30% percent of pass of 0.6mm sieve aperture, corresponding 25% percent of pass of 0.3mm sieve aperture, corresponding 17.5% percent of pass of 0.15mm sieve aperture, corresponding 12.5% percent of pass of 0.075mm sieve aperture, above-mentioned per-cent is to gather materials the weight percent that gross weight is benchmark.

Described breeze is the mineral pellet that particle diameter is less than 0.074 millimeter, control that its weight accounts for gross weight of gathering materials 1 ~ 3%, be conducive to like this improving compound sponginess and intensity.

In above-mentioned asphalt, described pigment can be that various being applicable to produces Colorful Asphalt Pavement pigment used, and preferential oxidation iron in the present invention, can adopt various commercially available prod, be not particularly limited.Its consumption can require to allocate by the ordinary method in this area according to color.

Present invention also offers a kind of preparation method of above-mentioned chromatic bitumen mixture, comprise the following steps:

1) extraction oil is heated to 150 ~ 180 DEG C, then adds petroleum resin, polyethylene wax, thermoplastic acrylic resin and pigment according to described proportioning, be uniformly mixed, namely prepare color asphalt;

2) by step 1) gained color asphalt is heated to 90 ~ 100 DEG C, what directly join asphalt mixing plant mixes and stirs in cylinder, with gather materials carry out mixing and stirring obtained.

The present invention by adding polyethylene wax and thermoplastic acrylic resin simultaneously in chromatic bituminous cement, dispersiveness and the weather resistance of pigment can be improved, in the intensity, anti-water damage property etc. of sponginess, compactibility, initial strength, shaping rear compound, all can meet or exceed the performance of dark asphalt compound simultaneously.With prior art, chromatic bitumen mixture provided by the invention has following characteristics:

1) bright fade lastingly, not easily, the high temperature of ability 77 DEG C and the low temperature of-23 DEG C;

2) there is good pavement performance, its high-temperature stability, water resistant damageability and excellent in te pins of durability, and there is not distortion, asphalt membrane such as to peel off at the phenomenon, good with basic unit cohesiveness;

Embodiment

The present invention is set forth further below in conjunction with embodiment.Should be understood that these embodiments are only for illustration of the present invention, but not limit the scope of the invention.

One, Material selec-tion

C5/C9 copolymerized petroleum resin: Sino-German petroleum resin company limited produces, softening temperature 100 DEG C, and product specification is as follows:

Lube oil furfural refining extracts oil out: product specification is as follows: kinetic viscosity: 35-45 DEG C, density: 0.99-1.01, flash-point: 255-270 DEG C, pour point: 18 DEG C, colourity: be greater than 8, moisture content: 0-0.01%.

Polyethylene wax: happy and auspicious board XH-200 type, softening temperature 105-115 DEG C.

Thermoplastic acrylic resin: produce with moral Chemical Co., Ltd., model AC1261, range of viscosities is 1000 ~ 2000cps (30 DEG C), solid part 55 ± 2%, acid number 4 ~ 6mgKOH/g, Tg value 47 DEG C.

Two, grading limit:

Coarse aggregate and fine aggregate all select grouan, and grading limit is in table 1.

The grating that table 1 gathers materials

Size of mesh/mm	4.75	2.36	1.18	0.6	0.3	0.15	0.075
								By percentage/%	100	72.5	50	30	25	17.5	12.5

Three, proportioning raw materials:

Table 2 ratio of components

Four, process for preparation:

First thick, fine aggregate are stirred in mixing and stirring in cylinder of concrete batch plant and are heated to 110-120 DEG C.Again extraction oil is heated to 150 ~ 180 DEG C, then adds petroleum resin, polyethylene wax, thermoplastic acrylic resin and pigment according to proportioning in table 2, be uniformly mixed, namely prepare colour liquid pitch.By described bitumen aggregate ratio precise aforesaid liquid pitch, and be heated to 90 ~ 100 DEG C, directly join and above-mentionedly mix and stir in cylinder, with gather materials carry out mixing and stirring obtained.

Five, performance test:

1. the water resistant peel-ability of surface of aggregate pitch is measured according to the water-boiling method in " highway engineering pitch and rubber-asphalt mixture testing regulation " (JTJ052-2000).Observe the asphalt membrane of surface of aggregate retain after poach intact, evaluation all liquid pitch is 5 with the adhesivity grade of gathering materials.Eu-bitumen according to all embodiments of observation all has good toughness and elasticity, and color vivid homogeneous, to place color after the several months unchanged.

2. the method specified according to existing " highway engineering pitch and rubber-asphalt mixture testing regulation " (JTJ052-2000) measures penetration degree and the softening temperature of eu-bitumen, and testing data is in table 3.

3., under the condition of 15 DEG C, after hammering is shaping, detect its Marshall stability.The method that the testing method of Marshall stability adopts " highway engineering pitch and rubber-asphalt mixture testing regulation " (JTJ052-2000) to record is carried out, and test result is as table 3.

4. high-temperature stability, adopt T0703-1993 method shaping test piece in " highway engineering pitch and rubber-asphalt mixture testing regulation " (JTJ052-2000), after placing 48h under normal temperature, carry out wheel tracking test by T0729-2000 method in JTJ052-2000, testing data is in table 3.

5. anti-water damage, adopt T0729-2000 method in " highway engineering pitch and rubber-asphalt mixture testing regulation " (JTJ052-2000) to carry out indirect tensile test on frozen-thaw, testing data is in table 3.

Table 3 test result

As can be seen from above test-results, chromatic bitumen mixture provided by the present invention in the intensity, anti-water damage property, high temperature durability etc. of sponginess, compactibility, initial strength, shaping rear compound all considerably beyond the requirement of JTGF40-2004.

Claims (7)

1. a new type colorful asphalt, is characterized in that, the raw material of described asphalt is made up of chromatic bituminous cement, pigment and gathering materials; Described gathering materials comprises coarse aggregate, fine aggregate; Described chromatic bituminous cement comprises the component of following weight part: petroleum resin 100 parts, extracts oily 80-120 part out, polyethylene wax 5-10 part, thermoplastic acrylic resin 15-20 part.

2. chromatic bitumen mixture as claimed in claim 1, it is characterized in that, described petroleum resin are C5/C9 copolymerized petroleum resin.

3. chromatic bitumen mixture as claimed in claim 1, is characterized in that, described extraction oil is lube oil furfural refining extraction oil.

4. chromatic bitumen mixture as claimed in claim 1, it is characterized in that, described chromatic bituminous cement and described weight ratio of gathering materials are 4-5%.

5. chromatic bitumen mixture as claimed in claim 1, it is characterized in that, described coarse aggregate and fine aggregate all select grouan, aggregate grading is: corresponding 100% percent of pass of 4.75mm sieve aperture, corresponding 72.5% percent of pass of 2.36mm sieve aperture, corresponding 50% percent of pass of 1.18mm sieve aperture, corresponding 30% percent of pass of 0.6mm sieve aperture, corresponding 25% percent of pass of 0.3mm sieve aperture, corresponding 17.5% percent of pass of 0.15mm sieve aperture, corresponding 12.5% percent of pass of 0.075mm sieve aperture.

6. chromatic bitumen mixture as claimed in claim 1, it is characterized in that, described pigment is ferric oxide.

7. a preparation method for the chromatic bitumen mixture as described in claim arbitrary in claim 1-7, comprises the following steps:

1) extraction oil is heated to 150 ~ 180 DEG C, then adds petroleum resin, polyethylene wax, thermoplastic acrylic resin and pigment according to described proportioning, be uniformly mixed, namely prepare color asphalt;

2) by step 1) gained color asphalt is heated to 90 ~ 100 DEG C, what directly join asphalt mixing plant mixes and stirs in cylinder, with gather materials carry out mixing and stirring obtained.