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Process for preparing bituminous composite modified master and modified asphalt

A modified asphalt and composite modification technology, applied in building thermal insulation materials, building components, buildings, etc., can solve problems such as high temperature storage instability, and achieve the effects of simple production process, low modification cost, and increased density

Inactive Publication Date: 2006-09-27
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem of unstable high-temperature storage in the prior art, and the prepared modified asphalt has good high-temperature storage stability and has good low-temperature cracking resistance, anti-aging and other characteristics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0018] Mix 100g of powdered styrene-butadiene rubber and bentonite (1000 mesh) blends in different mixing ratios on an open mill at about 110°C for 5 minutes. Modified masterbatch, the formula composition of this modified masterbatch is shown in Table 1.

[0019] Master batch number

Dosage of powdered styrene butadiene rubber

Dosage of bentonite

1

100

30

2

100

40

3

100

50

4

100

60

[0020] The modified masterbatches with formulas 1-4 were added to 600g asphalt at 150°C and dispersed in a high-speed shear emulsifier for 40 minutes to prepare modified asphalt with a polymer content of 4% in the modified asphalt. Performance indicators such as ductility, softening point, segregation, viscosity and penetration were tested according to GB / T4508, GB / T4507, JTJ052 / T660, ASTM D4402 and GB / T4509 respectively. The properties of the prepared modified asphalt...

Embodiment 5-8

[0024] Mix 100g of powdered styrene-butadiene rubber and diatomite (600 mesh) blends in different mixing ratios on an open mill at about 110°C for 5 minutes. The modified masterbatch was obtained from pellets, and the formula composition of the modified masterbatch is shown in Table 3.

[0025] Master batch number

SBR dosage

Diatomaceous earth dosage

5

100

30

6

100

40

7

100

44

8

100

50

[0026] The modified masterbatches with formulas 5-8 were added to 600g asphalt at 150°C and dispersed in a high-speed shear emulsifier for 60 minutes to prepare modified asphalt with SBR content of 2% and 4%. Performance indicators such as ductility, softening point, segregation, viscosity and penetration were tested according to GB / T4508, GB / T4507, JTJ052 / T660, ASTM D4402 and GB / T4509 respectively. The properties of the prepared modified asphalt are shown in Tabl...

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PUM

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Abstract

The invention discloses a bitumen composite modified masterbatch and modified bitumen preparing method, which is characterized by the following: premixing powder butylbenzene rubber and inorganic stabler through macromolecular manufacturing equipment to obtain the bitumen modified masterbatch; dispersing the modified masterbatch in the substrate bitumen evenly through high-speed cutting mixing equipment. The invention simplifies the producing technology, which can be applied to pave path and waterproof coiled material.

Description

【Technical field】 [0001] The invention relates to a composite modified masterbatch for modifying asphalt and a preparation method for modifying asphalt. 【Background technique】 [0002] Asphalt is a cheap and high-quality paving material, but asphalt materials have the problems of easy flow at high temperature and cracking at low temperature. In order to solve these problems, polymer materials are usually added to modify asphalt to improve the temperature sensitivity of asphalt. Commonly used materials mainly include butadiene-styrene thermoplastic elastomer (SBS), styrene-butadiene rubber (SBR), ethylene-vinyl acetate copolymer (EVA), and polyethylene (PE). The addition of these polymer materials can greatly improve the temperature sensitivity of the asphalt and improve the performance of the modified asphalt. Generally, SBS can improve the high and low temperature performance of modified asphalt, SBR mainly improves the low temperature performance of modified asphalt, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K3/34C08L9/06
Inventor 刘欣刘伟强谢续明
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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