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Asphalt mixture doped with flocculent basalt fibers

A technology of basalt fiber and asphalt mixture, which is applied in the field of road engineering materials, can solve the problems of not improving the pavement strength, poor water stability of the mixture, affecting durability, etc. The effect of water stability

Pending Publication Date: 2021-10-19
江苏绿材谷新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lignin fiber has the phenomenon of hollow tube oil absorption, and some asphalt is absorbed into the interior of the fiber. This part of asphalt absorbed neither increases the thickness of the asphalt oil film nor improves the strength of the road surface. Instead, it increases the amount of asphalt and increases the cost; The vegan fiber has strong water absorption, which can easily cause poor water stability of the mixture and affect its durability.

Method used

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  • Asphalt mixture doped with flocculent basalt fibers
  • Asphalt mixture doped with flocculent basalt fibers
  • Asphalt mixture doped with flocculent basalt fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First heat the SBS modified asphalt to a molten state in an oven at 160°C, and keep it warm for later use. Coarse aggregate, fine aggregate and mineral powder in advance (the ratio of 1# coarse aggregate: 2# coarse aggregate: fine aggregate: mineral powder to the total mass of mineral aggregate is 40.0:33.0:16.5:10.5), The flocculent basalt fiber with 3‰ of the total mass of the asphalt mixture was heated at 185°C for more than 5 hours. Mix the coarse aggregate, fine aggregate, mineral powder and flocculent basalt fiber in the mixing pot for 25 seconds, then add the SBS modified asphalt (accounting for 4.5% of the total mass percentage of the asphalt mixture) for step 1 heat preservation, and continue mixing 90 to 95 seconds to prepare the asphalt mixture mixed with flocculent basalt fibers.

Embodiment 2

[0039] First, heat the SBS modified asphalt in an oven at 165°C to a molten state, and keep it warm for later use. Coarse aggregate, fine aggregate and slag powder (the ratio of 1# coarse aggregate: 2# coarse aggregate: fine aggregate: slag powder to the total mass of mineral material is 42.0:30.0:18.0:10.0) and The flocculent basalt fibers of 4‰ of the total mass of the asphalt mixture were heated at 180°C for more than 5 hours. Mix the coarse aggregate, fine aggregate, mineral powder and flocculent basalt fiber in the mixing pot for 25 seconds, then add the SBS modified asphalt (accounting for 5.0% of the total mass percentage of the asphalt mixture) for heat preservation in step 1, and continue mixing 90 to 95 seconds to prepare the asphalt mixture mixed with flocculent basalt fibers.

Embodiment 3

[0041] First, heat the SBS modified asphalt to a molten state in an oven at 170°C, and keep it warm for later use. Coarse and fine aggregates and slag powder (the ratio of 1# material: 2# material: fine aggregate: slag powder to the total mass is 45.0:30.0:16:9.0) and 4.5‰ of the total mass of flocculent basalt fiber Heat at 190°C for more than 5h. Mix the coarse and fine aggregates, mineral powder and flocculent basalt fiber in the mixing pot for 25 seconds, then add the SBS modified asphalt (accounting for 5.6% of the total mass percentage) for heat preservation in step 1, and continue mixing for 90-95 seconds to prepare the prepared The above-mentioned asphalt mixture mixed with flocculent basalt fibers.

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Abstract

The invention provides an asphalt mixture doped with basalt flocculent fibers. The asphalt mixture comprises the following components in percentage by mass: SBS (styrene-butadiene-styrene) modified asphalt with the amount accounting for 4.2-6.6% of the specific gravity of the mixture, basalt flocculent fibers with the total doping amount accounting for 0.3-0.45% of the specific gravity of the mixture, and a mineral aggregate with the amount accounting for 93-95.4% of the total weight of the mixture, wherein the mineral aggregate comprises coarse aggregate, fine aggregate and mineral powder, and the coarse aggregate and the fine aggregate are basalt. The invention also provides a preparation method of the asphalt mixture, the basalt flocculent fiber is doped into the prepared asphalt mixture, so that the asphalt-aggregate ratio of the asphalt mixture is increased, the low-temperature performance of the asphalt mixture is improved, the problems of ruts, cracks and other diseases of an asphalt pavement are solved, the asphalt mixture has great significance in improving the use quality of the pavement and prolonging the service life of the asphalt pavement, the comprehensive performance is good, and the economic benefit is excellent.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and relates to an asphalt mixture mixed with flocculent basalt fibers. Background technique [0002] With the rapid development of my country's road transportation industry, there are many heavy-duty vehicles with large traffic volumes and even overloaded and over-limited phenomena. At the same time, affected by comprehensive factors such as the service environment, higher standard performance requirements are put forward for asphalt pavement materials. SMA asphalt mixture With the structural characteristics of "three more and one less", the material has excellent road performance and is widely used in modern high-grade roads. [0003] The SMA asphalt mixture is mainly composed of coarse aggregates, which makes it highly resistant to rutting at high temperatures. The asphalt mastic, which is composed of a large amount of mineral powder, a large amount of asphalt, and a small amo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26C04B14/46
CPCC04B26/26C04B14/46C04B2111/0075C04B18/12C04B14/00C04B20/0076
Inventor 刘建勋魏星崔瀛郭玉尧刘喜辉
Owner 江苏绿材谷新材料科技发展有限公司
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