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Method for interweaving basalt fibers in asphalt mixture

A technology of basalt fiber and asphalt mixture, which is applied in the field of basalt fiber interweaving in asphalt mixture, can solve the problems of reaction, less water stability, and high production cost, and achieves improved low-temperature crack resistance, improved water stability, and reduced The effect of cost

Pending Publication Date: 2021-07-20
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of test data show that the high-temperature stability and low-temperature crack resistance of asphalt concrete have been significantly improved after adding basalt fibers, but the improvement of water stability is not only small, but sometimes even has a reverse effect
And because basalt fiber is made of basalt through high-temperature melting and drawing, its production cost is relatively high

Method used

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  • Method for interweaving basalt fibers in asphalt mixture
  • Method for interweaving basalt fibers in asphalt mixture
  • Method for interweaving basalt fibers in asphalt mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First heat the SBS modified asphalt to a molten state in an oven at 180±5°C, and keep it warm for later use.

[0039] Preheat 10927.48g coarse and fine aggregates at 175±5°C for more than 4h.

[0040] Heat the mixing pot of asphalt mixture to 185±5°C, first pre-heated 10927.48g coarse and fine aggregates (among which the mass of 1# material, 2# material, 3# material and 4# material are 4842.86g, 4594.51g respectively , 0.00g, 1490.11g) and 15.37g of chopped basalt fiber, 15.37g of lignin fiber and 15.37g of polyester fiber were mixed in a mixing pot for 95s;

[0041] Then add 760.58g of SBS modified asphalt for heat preservation and mix for 95-100s, and finally add 1490.11g of ore powder and mix for 95-100s to prepare the asphalt mixture mixed with basalt fiber, lignin fiber and polyester fiber. material.

Embodiment 2

[0043] First heat the SBS modified asphalt to a molten state in an oven at 180±5°C, and keep it warm for later use.

[0044] Preheat 10959.24g of coarse and fine aggregates at 175±5°C for more than 4 hours.

[0045] Heat the asphalt mixture mixing pot to 185±5°C, firstly preheat 10959.24g of coarse and fine aggregates (of which the mass of 1# material, 2# material, 3# material and 4# material are respectively 4856.94g, 4607.86g , 0.00g, 1494.44g) and 23.08g of chopped basalt fiber, 11.54g of lignin fiber and 11.54g of polyester fiber were mixed in the mixing pot for 95s, and then 737.26g of SBS modified asphalt for heat preservation was added and mixed Mix for 95-100 seconds, and finally add 1494.44 g of ore powder and mix for 95-100 seconds to prepare the asphalt mixture mixed with basalt fiber, lignin fiber and polyester fiber.

Embodiment 3

[0047]First heat the SBS modified asphalt to a molten state in an oven at 180±5°C, and keep it warm for later use.

[0048] Preheat 10935.50g of coarse and fine aggregates at 175±5°C for more than 4 hours.

[0049] Heat the asphalt mixture mixing pot to 185±5°C, firstly preheat 10935.50g of coarse and fine aggregates (of which the mass of 1# material, 2# material, 3# material and 4# material are respectively 4846.42g, 4597.88g , 0.00g, 1491.21g) and 18.43g of chopped basalt fiber, 9.22g of lignin fiber and 18.43g of polyester fiber were mixed in the mixing pot for 95s, and then 738.15g of SBS modified asphalt was added for heat preservation and mixed Mix for 95-100s, and finally add 1491.21g of ore powder and mix for 95-100s to prepare the asphalt mixture mixed with basalt fiber, lignin fiber and polyester fiber.

[0050] SEM images of the fiber-asphalt interface (such as figure 1 Shown), combined with a large number of fiber interweaving experiments, it can be seen that the...

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Abstract

The invention discloses a method for interweaving basalt fibers in an asphalt mixture, wherein the method comprises the steps: heating SBS modified asphalt to a molten state, and preserving heat for later use; preheating coarse and fine aggregates; heating an asphalt mixture mixing pot to 185+ / -5 DEG C, and mixing the preheated coarse and fine aggregates with chopped basalt fibers, lignin fibers and polyester fibers in the mixing pot; then adding the SBS modified asphalt for heat preservation for mixing; and finally doping mineral powder for mixing to prepare an asphalt mixture doped with the basalt fibers, the lignin fibers and the polyester fibers. On the basis of ensuring the improvement of the high-temperature stability and low-temperature crack resistance of the basalt fibers on the asphalt mixture, the defects of the basalt fibers on the improvement of the water stability are overcome, the improvement characteristics of different fibers on the pavement performance of the asphalt mixture are utilized, and strong points are learned to offset weakness, so that the effect of directionally improving the pavement performance is achieved, an interlacing scheme with optimal comprehensive benefits can be obtained, and thus the service life of a road is prolonged, and the manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a method for interweaving basalt fibers in asphalt mixtures. Background technique [0002] At present, with the rapid development of road traffic in my country, the traffic volume, especially heavy-duty and overloaded vehicles, is gradually increasing, and the scope of road construction is gradually extending to extreme environments, resulting in frequent asphalt pavement damage such as rutting, cracks, cracks, oil flooding, and wrapping. , which raises the requirements for high temperature stability, low temperature crack resistance and water stability of asphalt concrete to a new height. [0003] As a common external admixture to asphalt concrete, basalt fiber is widely used because of its high strength, high modulus, high stability, and outstanding high temperature and aging resistance. A large number of test data show that the high-temperature s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B16/06C04B14/46
CPCC04B26/26C04B14/4643C04B16/06C04B16/0683
Inventor 寇长江陈子恺娄可可肖鹏康爱红吴正光
Owner YANGZHOU UNIV
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