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Carbon nanotube-styrene block copolymers (CNT-SBS) modified asphalt

A CNT-SBS, 1. CNT-SBS technology, applied in the field of modified asphalt, can solve the problems of inaccurate composition ratio and insignificant effect, and achieve the effect of reducing the amount of CNT, good environmental conditions, and improving the modification effect.

Inactive Publication Date: 2012-11-07
HEILONGJIANG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems that the existing CNT-SBS modified asphalt has no obvious effect on improving ductility and softening point temperature compared with SBS modified asphalt, and the problem of inaccurate composition ratio, and provides a CNT-SBS modified asphalt. SBS modified asphalt

Method used

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  • Carbon nanotube-styrene block copolymers (CNT-SBS) modified asphalt
  • Carbon nanotube-styrene block copolymers (CNT-SBS) modified asphalt
  • Carbon nanotube-styrene block copolymers (CNT-SBS) modified asphalt

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Effect test

specific Embodiment approach 1

[0013] Embodiment 1: The CNT-SBS modified asphalt of this embodiment is characterized in that the CNT-SBS modified asphalt is composed of 95.97% base asphalt and 4% linear styrene-butadiene-styrene block by mass percentage The copolymer powder and 0.03% carbon nanotube are made; wherein, the base asphalt is No. 110 petroleum asphalt; the fineness of the linear styrene-butadiene-styrene block copolymer powder is 60-100 mesh.

[0014] The preparation method of CNT-SBS modified asphalt is achieved through the following steps: 1. First, use a pulverizer to crush the linear styrene-butadiene-styrene block copolymer particles to a powder with a fineness of 60-100 mesh shape to obtain linear SBS powder; 2. uniformly mix the linear SBS powder obtained in step 1 with carbon nanotubes at a mass ratio of 400:3 to obtain a CNT-SBS composite modifier; 3. mix the matrix in an oven Heat the asphalt to 110-130°C, then add the CNT-SBS composite modifier accounting for 4.2% by mass of the base ...

specific Embodiment approach 2

[0015] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in the step 3 of the preparation method of CNT-SBS modified asphalt, cut 5min with the rotating speed of 4000r / min with asphalt shearer, then use mixer to The rotating speed of 800r / min was stirred for 3min, and other steps and parameters were the same as in Embodiment 1.

[0016] Prove the beneficial effect of the present invention by following test:

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Abstract

The invention discloses a carbon nanotube-styrene block copolymers (CNT-SBS) modified asphalt, relates to a modified asphalt, and solves the problems that prior CNT-SBS modified asphalts are unobvious in effects of improving ductility and softening point temperature and inaccurate in component proportion compared with SBS modified asphalts. The CNT-SBS modified asphalt is prepared by materials of, by mass, 95.97% of matrix asphalts, 4% of linear styrene-butadiene- styrene block copolymer powders and 0.03% of carbon nanotubes. Compared with the SBS modified asphalts, the CNT-SBS modified asphalt has the advantages that the ductility is increased by 31.3%, the softening point is increased by 16.9%, compression resistance, crack resistance are high, plasticity is good and temperature sensibility is low, the CNT-SBS modified asphalt can preferably adapt to environmental condition of areas with large temperature difference, working temperature and area ranges are widened, high temperature compression resistance of the asphalt is improved, and the CNT-SBS modified asphalt is suitable for industrial production of the modified asphalt.

Description

technical field [0001] The invention relates to a modified asphalt Background technique [0002] Asphalt is the main pavement material used in road and bridge projects at home and abroad. Modern road traffic is characterized by large traffic flow, fast speed and high load capacity, so the requirements for road surface quality are also constantly increasing. Ordinary asphalt materials generally have the disadvantages of high penetration, low ductility, and low softening point within the engineering range, which are specifically manifested in asphalt compression resistance, poor crack resistance, poor plasticity, high temperature sensitivity, and narrow operating temperature range. Because ordinary asphalt is difficult to meet the requirements of modern road traffic for road surface quality, modified asphalt with better performance than ordinary asphalt has appeared in recent years. Among the existing asphalt modifiers, styrene-butadiene-styrene block copolymer, namely SBS, ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L53/02C08K7/00C08K3/04
Inventor 苏群孙凌张奇王国峰于文勇武鹤苏凌峰邵纯红魏建军
Owner HEILONGJIANG INST OF TECH
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