CN104151846A - Rubber and plastic alloy high viscosity modification asphalt - Google Patents

Abstract

The invention discloses a rubber and plastic alloy high viscosity modification asphalt, which is characterized in that a formula of the rubber and plastic alloy high viscosity modification asphalt comprises the following raw materials: 10 parts of 80 meshes rubber powder, 5 parts of M200056 plastic, 7.5 parts of Qingchuan rock asphalt, and 5 parts of SBR1588 butadiene styrene rubber. The invention also discloses a novel asphalt mixture based on above mentioned formula, and a method for making the novel asphalt mixture. The rubber and plastic alloy high viscosity modification asphalt has the beneficial technical effect that dynmaic viscosity index at 60 DEG C of the asphalt mixture is increased by 83.07 times, Brinell viscosity and softening point at 135 DEG C are greatly increased, and the product performance can reach the high viscosity modification asphalt standard technology requirement of Japanese.

Description

Rubber and plastic alloy high-viscosity modified asphalt

Technical field

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

Background technology

Along with Chinese society expanding economy, taking urban road and motorway as the Transportation Industry relying on also develops rapidly, already became the important component part in transport system; For service economy, promote that Transportation Industry further develops, 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 taking mountain region as main, and The mountains are high and the roads are steep, and annual quantity of precipitation is larger, and this has proposed 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.

In the existing construction technique normalizing of China, explicitly point out, 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, can directly affect intensity, weather resistance and the anti-water damage ability of OGFC compound, 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 the recovery utilization rate of China's waste old and plastics is compared developed country and also had certain gap, and we need to take measures to improve the recovery utilization rate of waste old and plastics as far as possible.Adopt waste old and plastics to become one of great science and technology in contemporary road construction for composite modified asphalt, to be used for 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 can also improve the use properties on road surface, there is the benefit of economy, society, environment three aspects:.

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 10 parts of order rubber powders, 5 parts, M200056 plastics, 7.5 parts of Qing Chuan rock asphalt, 5 parts, SBR1588 styrene-butadiene rubber(SBR).

Formula by the prepared a kind of novel asphalt compound of aforementioned rubber and plastic alloy high-viscosity modified asphalt is: 100 parts of matrix pitches, 80 10 parts of order rubber powders, 5 parts, M200056 plastics, 7.5 parts of Qing Chuan rock asphalt, 5 parts, SBR1588 styrene-butadiene rubber(SBR).

The making method of aforementioned novel asphalt compound 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 styrene-butadiene rubber(SBR), be stirred to obviously granular substance of nothing 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 under 170～180 DEG C of conditions, carry out;

7) mixture E is incubated and grows 30min.Insulation can be used for paving after having grown.

In Road construction, novel asphalt compound in situ preparation, with mixing with use.

Useful technique effect of the present invention is: making 60 DEG C of kinetic viscosity indexs of asphalt improve 83.07 times, 135 DEG C brookfield viscosities and softening temperature all has significantly and promote, and product performance reach the requirement of Japanese high adhered modification pitch technological standard.

Brief description of the drawings

Fig. 1,15 DEG C of curves that ductility changes 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 10 parts of order rubber powders, 5 parts, M200056 plastics, 7.5 parts of Qing Chuan rock asphalt, 5 parts, SBR1588 styrene-butadiene rubber(SBR).

A kind of novel asphalt compound, described novel asphalt compound 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 compositions is: 100 parts of matrix pitches, 80 10 parts of order rubber powders, 5 parts, M200056 plastics, 7.5 parts of Qing Chuan rock asphalt, 5 parts, SBR1588 styrene-butadiene rubber(SBR).

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

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 styrene-butadiene rubber(SBR), be stirred to obviously granular substance of nothing 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 under 170～180 DEG C of conditions, carry out;

7) mixture E is incubated and grows 30min.

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

In formula, technical indicator, material character and the test result of matrix pitch, 80 order rubber powders, M200056 plastics and Qing Chuan rock asphalt is 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: visco-elasticity, lower temperature resistance, high thermal resistance and the ageing resistance that can significantly improve pitch; M200056 plastics role in formula is: promote viscosity, softening temperature, equivalent brittle point and the temperature sensibility of pitch, can also strengthen the rutting resistance of asphalt; Rock asphalt role in formula in Qing Chuan is: can effectively improve non-deformability, temperature-sensitive performance, high-temperature behavior and the low-temperature performance of pitch, can also promote the anti-rut, antistripping of asphalt, 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, the toughness of increase pitch, can also promote the crack resistance at low-temperature of asphalt;

Table 1 matrix pitch technical indicator and test result

Physics and the chemical index of table 2 80 order rubber powders

Table 3 M200056 plastics performance technical indicator

Table 4 Qing Chuan rock asphalt technical indicator

Asphalt type contrast index	The cloth rock asphalt that pauses	North America rock asphalt	Qing Chuan rock asphalt
				Softening temperature (DEG C)	160-175	160-175	200 left and right
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 compositions, then according to pre-stage test result, adopt single factors vary test method respectively the proportioning of various compositions accurately to be designed, specific design process following (hereinafter, the per-cent of various compositions is all determined by the proportionlity of every kind of material and matrix pitch):

First, by listed formula in table 5, the volume of M200056 plastics is carried out to single factors vary test, 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
						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, with respect to 4# group and 5# group, and 15 DEG C of ductility maximums of 3# group, therefore selected 3# group of formula is proceeded the design of rock asphalt volume.(bitumen ductility value has represented the plasticity of pitch, i.e. the deformability of pitch, the ductility value of certain pitch greatly 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 is respectively 5% and 10%, and 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, with respect to 9# and 10# group, and 15 DEG C of ductility maximums of 8# group of formula, therefore selected 8# group of formula is proceeded 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, is respectively 5% and 5%, and 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 cannot be up to standard except 15 DEG C of stretch indexes, all the other indexs are all qualified, and wherein 15 of the 12# group of formula DEG C of relative 13# group of ductility～15# groups are the highest, the therefore optimization formula using 12# group of formula as single factor modulation.From the result of single factors vary modulation modifying asphalt, can also find, only add 15 DEG C of stretch indexes of the high adhered modification pitch that rubber powder, plastics, rock asphalt make lower, in order to promote as much as possible 15 DEG C of ductilities of modifying asphalt, next select softening agent further to improve high adhered modification pitch; 3 kinds of SBR performance index are in table 9, and 12# group of formula is added the test-results of 3 kinds of different SBR in table 10～table 12 (SBR volume has been selected 3%～5% scope of manufacturer's recommended).

3 kinds of SBR performance index of table 9

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; From form and graphic representation, can find out, 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 wherein ductility being promoted to the best SBR of effect is SBR1588.Simultaneously, from graphic representation, also can find out, the softening temperature of modifying asphalt can decline gradually with the increase of SBR volume, to such an extent as to after only having added 3% SBR, its softening temperature cannot reach the requirement of 80 DEG C of specifications, tests so consider to reselect formula interpolation SBR.Consider add SBR1588 relatively other two kinds of SBR materials improve pitch plasticity better effects if, reselected the relatively high and 15 DEG C of not too low 9# group of formula of ductility of 60 DEG C of viscosity and added SBR1588 and test, formula and test-results are in table 13;

Table 13

In the time that 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 therefore final definite optimization formula volume 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 10 parts of order rubber powders, 5 parts, M200056 plastics, 7.5 parts of Qing Chuan rock asphalt, 5 parts, SBR1588 styrene-butadiene rubber(SBR).

2. a novel asphalt compound, it is characterized in that: described novel asphalt compound 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 compositions is: 100 parts of matrix pitches, 80 10 parts of order rubber powders, 5 parts, M200056 plastics, 7.5 parts of Qing Chuan rock asphalt, 5 parts, SBR1588 styrene-butadiene rubber(SBR).

3. a novel asphalt compound making method, is characterized in that: following steps for manufacturing novel asphalt compound:

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 styrene-butadiene rubber(SBR), be stirred to obviously granular substance of nothing 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 under 170 ~ 180 DEG C of conditions, carry out;

7) mixture E is incubated and grows 30min.