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Method for preparing solid refuse composite modified asphalt

A composite modified asphalt and solid waste technology, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems affecting the quality of modified asphalt, increasing the cost of raw materials, aging of asphalt, etc., to achieve low price and novel technology , the effect of sufficient sources

Inactive Publication Date: 2008-06-18
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] CN1528823A has reported a kind of preparation method of waste rubber powder modified asphalt, adopts rubber powder / polymer composite modified asphalt, this method has solved the long-distance transportation preparation modified asphalt problem, but needs to add a certain proportion of polymerized asphalt in the modifier This increases the cost of raw materials, and two long-term high-temperature processes of high-concentration rubber powder will cause some asphalt to age, and excessive degradation of rubber powder will affect the quality of modified asphalt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: The process is carried out in two steps. In the first step, heat 16g of surfactant to about 70°C, add 110g of rubber powder in batches under stirring, keep stirring for 8 minutes, and the stirring speed is 40r / min. After stirring evenly, Cool down, discharge, and bag for later use. The second step is to heat 500g of Panjin Huanxiling brand 90# asphalt to 120°C, add 6g of waste plastic fragments in batches under stirring, the stirring speed is 800r / min, continue to heat up to about 170°C, stir rapidly for 6 minutes, and the stirring speed is 1200r / min, the waste plastic has been completely melted into the asphalt. Keep the temperature at about 170°C, add 110g of modified rubber powder in batches under stirring, then stir rapidly for 20 minutes at a stirring speed of 1400r / min, then add 2.5g of crosslinking agent and 6g of waste pyrolytic carbon black, and keep stirring After 6 minutes, high-speed shearing for 30 minutes or colloid mill grinding, heat preserva...

Embodiment 2

[0015] Example 2: The preparation method is the same as in Example 1, except that the base asphalt is Zhonghai 36-1 Binzhou 70# asphalt, and the performance test results are shown in Table 1.

Embodiment 3

[0016] Example 3: The preparation method is the same as in Example 1, except that the base asphalt is Zhonghai 36-1 Binzhou 90# asphalt, and the performance test results are shown in Table 1.

[0017] The basic properties of the prepared solid waste composite modified asphalt are shown in Table 1:

[0018]

project

implement

example 1

implement

Example 2

implement

Example 3

American glue

powder asphalt

standard

Tianjin rubber powder asphalt label

standard (no national standard)

Penetration (25°C,

0.1mm)

50

46

49

25-75

40-60

Softening point (℃)

59

61

59

＞54

≥55

Ductility (5℃, cm)

12.5

11.6

12

(4℃)＞5

≥10

Segregation (softening spread)

0.7

2.2

1.9

≤2.5

[0019] What is cited in the table is the techni...

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PUM

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Abstract

The present invention belongs to the technical field of asphalt modification. The present invention relates to solid wastes comprising waste rubber, waste plastic and waste pyrolysis carbon black, the composing of which is 2 percent to 22 percent of waste rubber powder, 1 percent to 8 percent of the waste plastic, 0.5 percent to 6 percent of the waste pyrolysis carbon black, 1 percent to 6 percent of surfactant, 0.02 percent to 3 percent of crosslinking agent and 75 percent to 90 percent of asphalt. A preparation technology is finished by two steps that a first step is modifying the rubber powder, under the temperature condition of 70 DEG C to 100 DEG C, the rubber powder and the surfactant are mixed and stirred for 5 to 20 minutes at the speed of 20 to 100r / min and are mixed uniformly for using; the second step is to prepare modified asphalt, the asphalt is heated up to 120 DEG C to 160 DEG C, the waste plastic is added while being stirred at the speed of 200 to 1000r / min and then is stirred fast for 5 to 10 minutes at the speed of 600 to 3000r / min, the temperature is kept about 170 DEG C, modified rubber powder is added while being stirred, the crosslinking agent and the waste pyrolysis carbon black are added to be stirred fast for 10 to 20 minutes, and a system is processed for high-speed cutting or colloid mill grinding to prepare the modified asphalt.

Description

technical field [0001] The invention is to prepare a pavement material used for laying roads. Background technique [0002] Modification of asphalt with high molecular polymers as pavement materials can improve the high temperature stability, low temperature crack resistance, aging resistance and durability of asphalt, which has long been recognized by people. As asphalt modifiers, commonly used polymers are: 1. Thermoplastic elastomers, including styrene-butadiene-styrene graft copolymer (SBS), styrene-isoprene-styrene 2. Rubbers, including styrene-butadiene rubber (SBR), neoprene (CR), styrene-butadiene latex, etc.; 3. Resins, including polyethylene (PE), polypropylene (PP) ), ethylene-vinyl acetate copolymer (EVA) and so on. Among them, because SBS has the characteristics of two-phase structure of resin phase and rubber phase, and has good deformation recovery ability, the high and low temperature performance of modified asphalt is greatly improved. Therefore, it is the...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K5/20C08L23/00C08K3/04C08K3/22
Inventor 刘双喜刘力余强朱坦
Owner NANKAI UNIV
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