CN104151846B - Rubber and plastic alloy high-viscosity modified asphalt - Google Patents

Abstract

The invention discloses a kind of rubber and plastic alloy high-viscosity modified asphalt, its innovation is: the formula of described rubber and plastic alloy high-viscosity modified asphalt is: 80 order rubber powders 10 parts, 5 parts, M200056 plastics, Qing Chuan rock asphalt 7.5 parts, 5 parts, SBR1588 styrene-butadiene rubber(SBR).The invention also discloses a kind of novel asphalt compound based on aforementioned formula and a kind of novel asphalt compound making method.Advantageous Effects of the present invention is: making 60 of asphalt DEG C of kinetic viscosity indexs improve 83.07 times, 135 DEG C brookfield viscosities and softening temperature all has and significantly promote, and product performance reach Japanese high adhered modification bitumen technology standard-required.

Description

Rubber and plastic alloy high-viscosity modified asphalt

Technical field

The present invention relates to a kind of pitch technology of preparing, particularly relate to a kind of rubber and plastic alloy high-viscosity modified asphalt.

Background technology

Along with Chinese society expanding economy, also develop rapidly for the Transportation Industry relied on urban road and motorway, already become the important component part in transport system; In order to service economy, promote Transportation Industry further develop, build high-quality urban road and motorway imperative; For vast Road construction person, the west area of Yao Shuo China that Road construction difficulty is larger, the landform of western China is based on mountain region, and The mountains are high and the roads are steep, and annual quantity of precipitation is comparatively large, and this proposes very harsh requirement to Road construction.

Open grade friction course (OGFC) is a kind of open gradation asphalt with the space that is interconnected, voidage is up to 18 ~ 25%, there is the advantages such as draining is good, anti-skidding, noise reduction, be made as drainage type bituminous pavement, significant for the western Road construction of China.

Explicitly point out in the existing construction technique normalizing of China, OGFC compound should use high-viscosity modified asphalt mix, research shows the key index of high-viscosity modified asphalt, i.e. 60 DEG C of kinetic viscosities, directly can affect the intensity of OGFC compound, weather resistance and anti-water damage ability, therefore, the performance quality of high-viscosity modified asphalt will directly determine the performance of OGFC compound.

On the other hand, waste old and plastics have a strong impact on our ecotope, and China's waste old is compared developed country and also had certain gap with the recovery utilization rate of plastics, and we need the recovery utilization rate taking measures as far as possible to improve waste old and plastics.Adopt waste old and plastics to prepare composite modified asphalt and become one of great science and technology in contemporary road construction, to be used in waste old and plastics Asphalt Concrete Pavement for High-Type Highways, not only can turn waste into wealth, reduce " black pollution " and " white pollution " in environment, and the use properties on road surface can also be improved, there is the benefit of economy, society, environment three aspect.

Summary of the invention

For the problem in background technology, the present invention proposes a kind of rubber and plastic alloy high-viscosity modified asphalt, the formula of described rubber and plastic alloy high-viscosity modified asphalt is: 80 order rubber powders 10 parts, 5 parts, M200056 plastics, Qing Chuan rock asphalt 7.5 parts, SBR15885 part.

The formula of a kind of asphalt prepared by aforementioned rubber and plastic alloy high-viscosity modified asphalt is: matrix pitch 100 parts, 80 order rubber powders 10 parts, 5 parts, M200056 plastics, Qing Chuan rock asphalt 7.5 parts, SBR15885 part.

The making method of aforementioned asphalt is:

1) 100 parts of matrix pitches are heated to 170 ~ 180 DEG C;

2) in matrix pitch, add 10 part of 80 order rubber powder, be stirred to and mix, obtain mixture A;

3) in mixture A, add 5 parts of M200056 plastics, be stirred to and mix, obtain mixture B;

4) in mixture B, add 7.5 parts of Qing Chuan rock asphalt, be stirred to and mix, obtain mixture C;

5) in mixture C, add 5 parts of SBR1588, be stirred to without obvious granular substance in mixture, obtain mixture D;

6) adopt asphalt shearing machine to carry out shearing manipulation to mixture D, velocity of shear is 3500r/min, and shear time is 45min, obtains mixture E;

Step 2) to 6) operation all carry out under 170 ~ 180 DEG C of conditions;

7) insulation is carried out to mixture E and grow 30min.After insulation growth completes, namely can be used for paving.

In Road construction, asphalt in situ preparation, with mix with.

Advantageous Effects of the present invention is: making 60 of asphalt DEG C of kinetic viscosity indexs improve 83.07 times, 135 DEG C brookfield viscosities and softening temperature all has and significantly promote, and product performance reach Japanese high adhered modification bitumen technology standard-required.

Accompanying drawing explanation

The curve that Fig. 1,15 DEG C of ductilities change with 3 kinds of SBR volumes;

The curve that Fig. 2, softening temperature change with 3 kinds of SBR volumes.

Embodiment

A kind of rubber and plastic alloy high-viscosity modified asphalt, the formula of described rubber and plastic alloy high-viscosity modified asphalt is: 80 order rubber powders 10 parts, 5 parts, M200056 plastics, Qing Chuan rock asphalt 7.5 parts, SBR15885 part.

A kind of asphalt, described asphalt is mixed by matrix pitch and rubber and plastic alloy high-viscosity modified asphalt, in matrix pitch and rubber and plastic alloy high-viscosity modified asphalt, the proportion relation of various composition is: matrix pitch 100 parts, 80 order rubber powders 10 parts, 5 parts, M200056 plastics, Qing Chuan rock asphalt 7.5 parts, SBR15885 part.

A kind of asphalt making method, following steps for manufacturing asphalt:

1) 100 parts of matrix pitches are heated to 170 ~ 180 DEG C;

2) in matrix pitch, add 10 part of 80 order rubber powder, be stirred to and mix, obtain mixture A;

3) in mixture A, add 5 parts of M200056 plastics, be stirred to and mix, obtain mixture B;

4) in mixture B, add 7.5 parts of Qing Chuan rock asphalt, be stirred to and mix, obtain mixture C;

5) in mixture C, add 5 parts of SBR1588, be stirred to without obvious granular substance in mixture, obtain mixture D;

6) adopt asphalt shearing machine to carry out shearing manipulation to mixture D, velocity of shear is 3500r/min, and shear time is 45min, obtains mixture E;

Step 2) to 6) operation all carry out under 170 ~ 180 DEG C of conditions;

7) insulation is carried out to mixture E and grow 30min.

Below in conjunction with testing data, the present invention program is further explained;

In formula, the technical indicator of matrix pitch, 80 order rubber powders, M200056 plastics and Qing Chuan rock asphalt, material character and test result respectively in table 1,2,3,4 (SBR1588 styrene-butadiene rubber(SBR) is the conventional raw material in chemical industry, therefore its material character does not repeat them here); Wherein, 80 order rubber powders role in formula is: can significantly improve the visco-elasticity of pitch, lower temperature resistance, high thermal resistance and ageing resistance; M200056 plastics role in formula is: promote the viscosity of pitch, softening temperature, equivalent brittle point and temperature sensibility, can also strengthen the rutting resistance of asphalt; Rock asphalt role in formula in Qing Chuan is: effectively can improve the non-deformability of pitch, temperature-sensitive performance, high-temperature behavior and low-temperature performance, can also promote the Rut resistance of asphalt, antistripping, anti-aging, high temperature resistance and weather resisteant; SBR1588 styrene-butadiene rubber(SBR) role in formula is: mainly improve the low-temperature performance of pitch, increase the toughness of pitch, can also promote the crack resistance at low-temperature of asphalt;

Table 1 matrix pitch technical indicator and test result

The physics of table 280 order rubber powder and chemical index

Table 3M200056 plastics performance technical indicator

Table 4 Qing Chuan rock asphalt technical indicator

Asphalt type contrast index	Cloth pauses rock asphalt	Gilsonite rock asphalt	Qing Chuan rock asphalt
				Softening temperature (DEG C)	160-175	160-175	About 200
Open flash point (DEG C)	＞230	＞315	＞330
				Density (g/cm)	1.70-1.90	1.04-1.06	1.05
Chloroform bitumen content (%)	50-70	90	80-90
				Nitrogen content (%)	1.5 below	3.3	1.90
Price (unit/t)	5000	12500	8000

The preferred process of formula is as follows:

The basic ideas of test are: after the composition in formula determines, first carry out tentative experiment, roughly determine the proportion relation of various composition, then according to pre-stage test result, single factor test change test method is adopted to carry out careful design to the proportioning of various composition respectively, specific design process following (hereinafter, the per-cent of various composition is all determined by the proportionlity of often kind of material and matrix pitch):

First, carry out single factor test change test by formula listed in table 5 to the volume of M200056 plastics, volume variation range is 0%-10%, and variable gradient is set as 2.5%, test-results meaning as shown in table 5;

Table 5

Test group number	1#	2#	3#	4#	5#
						Rubber powder volume (%)	10	10	10	10	10
Plastics volume (%)	0	2.5	5	7.5	10
						Rock asphalt volume (%)	5	5	5	5	5
60 DEG C of viscosity (Pas)	1017	12561	43213	73485	92561 4 -->
						15 DEG C of ductilities (cm)	34.1	20.6	13.2	6.9	4.8
Softening temperature (DEG C)	66.2	76.1	83.1	89.2	98.6
						Penetration degree (0.1mm)	46	43.5	41.2	38.8	35.3

As can be seen from Table 5, the penetration degree of 3# group of formula, softening temperature and 60 DEG C of viscosity indexes all reach code requirement, and relative to 4# group and 5# group, 15 DEG C of ductilities of 3# group are maximum, and therefore selected 3# group of formula proceeds the design of rock asphalt volume.(bitumen ductility value represents the plasticity of pitch, i.e. the deformability of pitch, and the ductility value of certain pitch greatly then means that this kind of pitch has better deformability at low temperatures, is not easy to produce low-temperature brittle fracture)

In rock asphalt volume design process, change the volume of rock asphalt, rock asphalt volume variation range is 0%-10%, and variable gradient is 2.5%, and the volume of plastics and rubber powder remains unchanged, and be respectively 5% and 10%, test-results is as shown in table 6:

Table 6

Test group number	6#	7#	8#	9#	10#
						Rubber powder volume (%)	10	10	10	10	10
Plastics volume (%)	5	5	5	5	5
						Rock asphalt volume (%)	0	2.5	5	7.5	10
60 DEG C of viscosity (Pas)	5869	18956	43213	58934	68627
						15 DEG C of ductilities (cm)	24.6	17.1	13.2	10.6	9.2
Softening temperature (DEG C)	74.2	80.2	83.1	85.9	88
						Penetration degree (0.1mm)	48	44.2	41.2	39.4	36.2

As can be seen from Table 6, the penetration degree of 8# group of formula, softening temperature, 60 DEG C of viscosity indexes all reach code requirement, and relative to 9# and 10# group, 15 DEG C of ductilities of 8# group of formula are maximum, and therefore selected 8# group of formula proceeds the design of rubber powder volume.

In rubber powder volume design process, change the volume of rubber powder, rubber powder volume variation range is 0%-10%, and variable gradient is 2.5%, and the maintenance volume of plastics and rock asphalt is constant, and be respectively 5% and 5%, test-results is as shown in table 7:

Table 7

Test group number	11#	12#	13#	14#	15#
						Rubber powder volume (%)	0	2.5	5	7.5	10
Plastics volume (%)	5	5	5	5	5
						Rock asphalt volume (%)	5	5	5	5	5
60 DEG C of viscosity (Pas)	20983	26567	33652	40142	43213
						15 DEG C of ductilities (cm)	21.7	19.4	16.6	14.5	13.2
Softening temperature (DEG C)	78.2	80.4	81.6	82.3	83.1
						Penetration degree (0.1mm)	45	44.1	43.7	42.8	41.2

12# group ~ 15# group of formula except 15 DEG C of stretch indexes cannot up to standard except, all the other indexs are all qualified, and wherein 15 DEG C of ductilities of 12# group of formula are the highest relative to 13# group ~ 15# group, therefore using optimization formula that 12# group of formula is modulated as single factor test.Can also find from the result of single factor test change modulates modifying asphalt, only add rubber powder, 15 DEG C of stretch indexes of high adhered modification pitch that plastics, rock asphalt obtain are lower, in order to promote 15 DEG C of ductilities of modifying asphalt as much as possible, softening agent is next selected to improve high adhered modification pitch further; 3 kinds of SBR performance index are in table 9, and 12# group of formula adds the test-results of 3 kinds of different SBR in table 10 ~ table 12 (SBR volume has selected 3% ~ 5% scope of manufacturer's recommended).

Table 93 kind of SBR performance index

Table 10 adds PSBR test-results

Table 11 adds SBR1502 test-results

Table 12 adds SBR1588 test-results

The curve that 15 DEG C of stretch indexes of formula and softening temperature index change with three kinds of SBR volumes as shown in Figure 1, 2; As can be seen from form and graphic representation, 15 DEG C of ductilities of modifying asphalt increase along with the increase of three kinds of SBR material volumes, the increasing amount of 15 DEG C of ductilities of three kinds of modifying asphalts can tend towards stability gradually along with the increase of SBR volume simultaneously, and the SBR wherein promoting effect best to ductility is SBR1588.Simultaneously, also can find out from graphic representation, the softening temperature of modifying asphalt can decline gradually with the increase of SBR volume, to such an extent as to after only with the addition of the SBR of 3%, its softening temperature cannot reach the requirement of specification 80 DEG C, so consider that reselecting formula interpolation SBR tests.Consider add SBR1588 relatively other two kinds of SBR materials improve pitch plasticity better effects if, reselected 60 DEG C of viscosity is relatively high and 15 DEG C of ductilities are not too low 9# group of formula and added SBR1588 and test, formula and test-results are in table 13;

Table 13

When SBR1588 volume is 5%, 60 DEG C of viscosity, softening temperature, penetration degrees all can reach high-viscosity asphalt code requirement, and 15 DEG C of ductilities are the highest, and the optimization formula volume therefore finally determined is 10% rubber powder, 5% plastics, 7.5% rock asphalt and 5%SBR1588.

The performance comparison of rubber and plastic alloy high-viscosity modified asphalt of the present invention and matrix pitch and Japanese high-viscosity asphalt code requirement is as shown in table 14;

Table 14

Claims (3)

1. a rubber and plastic alloy high-viscosity modified asphalt, is characterized in that: the formula of described rubber and plastic alloy high-viscosity modified asphalt is: 80 order rubber powders 10 parts, 5 parts, M200056 plastics, Qing Chuan rock asphalt 7.5 parts, SBR15885 part; Physics and the chemical index of described 80 order rubber powders see the following form:

2. an asphalt, it is characterized in that: described asphalt is mixed by matrix pitch and rubber and plastic alloy high-viscosity modified asphalt, in matrix pitch and rubber and plastic alloy high-viscosity modified asphalt, the proportion relation of various composition is: matrix pitch 100 parts, 80 order rubber powders 10 parts, 5 parts, M200056 plastics, Qing Chuan rock asphalt 7.5 parts, SBR15885 part; Physics and the chemical index of described 80 order rubber powders see the following form:

3. an asphalt making method, is characterized in that: following steps for manufacturing asphalt:

1) 100 parts of matrix pitches are heated to 170 ~ 180 DEG C;

2) in matrix pitch, add 10 part of 80 order rubber powder, be stirred to and mix, obtain mixture A;

3) in mixture A, add 5 parts of M200056 plastics, be stirred to and mix, obtain mixture B;

4) in mixture B, add 7.5 parts of Qing Chuan rock asphalt, be stirred to and mix, obtain mixture C;

5) in mixture C, add 5 parts of SBR1588, be stirred to without obvious granular substance in mixture, obtain mixture D;

6) adopt asphalt shearing machine to carry out shearing manipulation to mixture D, velocity of shear is 3500r/min, and shear time is 45min, obtains mixture E;

Step 2) to 6) operation all carry out under 170 ~ 180 DEG C of conditions;

7) insulation is carried out to mixture E and grow 30min;

Physics and the chemical index of described 80 order rubber powders see the following form: