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Basalt fiber asphalt preparation and performance evaluation method for simulating actual mixing process

A technology of basalt fiber and basalt, which is applied in the field of basalt fiber asphalt preparation and performance evaluation to simulate the actual mixing process, and can solve problems such as difficult mechanism of action and small proportion of basalt fiber

Active Publication Date: 2021-04-06
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to explore the mechanism of action of basalt fibers at the level of asphalt mixture due to the small proportion of the added basalt fiber in the overall mass of asphalt mixture.

Method used

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  • Basalt fiber asphalt preparation and performance evaluation method for simulating actual mixing process
  • Basalt fiber asphalt preparation and performance evaluation method for simulating actual mixing process
  • Basalt fiber asphalt preparation and performance evaluation method for simulating actual mixing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of basalt fiber pitch simulating actual mixing process, comprising the following steps:

[0028] (1) Weigh 1007.6 g of basalt coarse aggregate with a particle size between 16 and 26.5 mm, wash it with clean water, and dry it in an oven at 102 to 108 °C.

[0029] (2) Heat the dried basalt aggregate in an oven at 162-178°C for 4-5 hours, and raise the temperature of the mixing pot to 170-180°C.

[0030] (3) Weigh 3.1g of 6mm basalt fiber, put it into the mixing pot together with the aggregate and stir for 85-95s, and use tweezers to separate the basalt fiber from the aggregate after the stirring is completed.

[0031] (4) Weigh 117.9 g of base asphalt, and heat it to 162-178° C. on an induction cooker to make the asphalt in a completely fluid state.

[0032] (5) Weigh 0.6g of the dispersed basalt fiber, and add the basalt fiber to the matrix asphalt in batches with tweezers. After the basalt fiber is completely immersed in the matrix asphalt, use an ...

Embodiment 2

[0040] A preparation method of basalt fiber pitch simulating actual mixing process, comprising the following steps:

[0041] (1) Weigh 1003.9 g of basalt coarse aggregate with a particle size between 16 and 26.5 mm, wash it with clean water, and dry it in an oven at 102 to 108 °C.

[0042] (2) Heat the dried basalt aggregate in an oven at 162-178°C for 4-5 hours, and raise the temperature of the mixing pot to 170-180°C.

[0043] (3) Weigh 3.3g of 6mm basalt fiber, put it into the mixing pot together with the aggregate and stir for 85-95s, and use tweezers to separate the basalt fiber from the aggregate after the stirring is completed.

[0044] (4) Weigh 126.6g of base asphalt, and heat it to 162-178°C on an induction cooker to make the asphalt in a completely fluid state.

[0045] (5) Weigh 2.5 g of the dispersed basalt fiber, and add the basalt fiber into the matrix asphalt in batches with tweezers. After the basalt fiber is completely immersed in the matrix asphalt, use an ...

Embodiment 3

[0053] A preparation method of basalt fiber pitch simulating actual mixing process, comprising the following steps:

[0054] (1) Weigh 2001.6 g of basalt coarse aggregate with a particle size between 16 and 26.5 mm, wash it with clean water, and dry it in an oven at 102 to 108 °C.

[0055] (2) Heat the dried basalt aggregate in an oven at 162-178°C for 4-5 hours, and raise the temperature of the mixing pot to 170-180°C.

[0056] (3) Weigh 6.1g of 6mm basalt fiber, put it into the mixing pot together with the aggregate and stir for 85-95s, and use tweezers to separate the basalt fiber from the aggregate after the stirring is completed.

[0057] (4) Weigh 102.9 g of base asphalt, and heat it to 162-178° C. on an induction cooker to make the asphalt in a completely fluid state.

[0058] (5) Weigh 3.1 g of the dispersed basalt fiber, and add the basalt fiber to the matrix asphalt in batches with tweezers. After the basalt fiber is completely immersed in the matrix asphalt, stir w...

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Abstract

The invention discloses a basalt fiber asphalt preparation and performance evaluation method for simulating an actual mixing process. The method comprises the following steps: selecting coarse aggregate with the particle size range of 16-26.5 mm, cleaning, drying, heating for 4-5 hours in a drying oven with the temperature of 162-178 DEG C, and carrying out dry mixing on the coarse aggregate and bunchy basalt fibers for 85-95 seconds; and taking out the dry-mixed and scattered basalt fibers, weighing a certain mass of basalt fibers, adding the basalt fibers into asphalt with the temperature of 162-178 DEG C in batches, and fully stirring at a high speed by using an electric stirrer to obtain the basalt fiber asphalt. The basalt fiber asphalt is subjected to a temperature scanning test through a dynamic shear rheometer, and complex moduli, phase angles and rut factors corresponding to the basalt fiber asphalt at different temperatures are obtained to evaluate the high-temperature deformation resistance of the basalt fiber asphalt. The basalt fiber and the aggregate are subjected to pre-dry-mixing, the actual mixing process of the basalt fiber and asphalt mixture is simulated, and the improvement of the basalt fiber on the pavement performance of the asphalt and asphalt mixture in engineering practice is facilitated.

Description

technical field [0001] The invention belongs to the field of highway engineering materials, and in particular relates to a preparation and performance evaluation method of basalt fiber pitch which simulates an actual mixing process. Background technique [0002] The current era is developing rapidly. As the basis of the rapid development and integration of modern economy, transportation is also developing rapidly. Building a transportation power has become a major strategy for my country's current development. Road transportation is one of the main modes of transportation. There is no substitute for importance. Asphalt pavement is the most important carrier of road transportation, and the country's investment in its construction is also increasing. At the same time, the requirements for its performance are getting higher and higher. Therefore, fiber asphalt mixture has been greatly promoted, and basalt fiber asphalt mixture is one of them. [0003] At present, a large numbe...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/00991C04B14/14C04B14/46
Inventor 张垚吴宇浩肖鹏顾倩俪王业陈虎吴浩辰
Owner YANGZHOU UNIV
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