阅读说明：本技术 一种利用废弃玄武岩纤维增强复合材料改性的沥青混合料 (Asphalt mixture modified by waste basalt fiber reinforced composite material ) 是由 刘建勋 吴智深 魏星 崔瀛 刘喜辉 于 2021-03-10 设计创作，主要内容包括：本发明涉及一种利用废弃玄武岩纤维增强复合材料改性的沥青混合料,包括如下组分：4-6份沥青,0.2-0.4份废弃的玄武岩纤维增强复合材料,93-95份矿料；矿料由粒径为19-26.5mm的碎石、粒径为9.5-19mm的碎石、粒径为4.75-9.5mm的碎石、粒径为2.36-4.75mm的碎石、机制砂和矿粉组成；本发明对废弃的玄武岩纤维增强复合材料进行回收利用,因玄武岩纤维增强复合材料表面的树脂与沥青之间具有良好的相容性,在纤维与沥青之间起到增强、增韧的效果,所以对于沥青混合料的抗车辙性能、低温抗裂等路用性能有大幅提高。(The invention relates to an asphalt mixture modified by using a waste basalt fiber reinforced composite material, which comprises the following components: 4-6 parts of asphalt, 0.2-0.4 part of waste basalt fiber reinforced composite material and 93-95 parts of mineral aggregate; the mineral aggregate comprises crushed stone with the grain diameter of 19-26.5mm, crushed stone with the grain diameter of 9.5-19mm, crushed stone with the grain diameter of 4.75-9.5mm, crushed stone with the grain diameter of 2.36-4.75mm, machine-made sand and mineral powder; the waste basalt fiber reinforced composite material is recycled, and the good compatibility is realized between the resin on the surface of the basalt fiber reinforced composite material and the asphalt, so that the effects of reinforcing and toughening are realized between the fiber and the asphalt, and the road performances such as the rutting resistance, the low-temperature crack resistance and the like of the asphalt mixture are greatly improved.)

1. The asphalt mixture modified by the waste basalt fiber reinforced composite material is characterized by comprising the following components in parts by weight: 4-6 parts of asphalt, 0.2-0.4 part of waste basalt fiber reinforced composite material and 93-95 parts of mineral aggregate; the basalt fiber reinforced composite material is basalt fiber reinforced vinyl resin or basalt fiber reinforced epoxy resin;

the mineral aggregate is composed of crushed stone with the grain diameter of 19-26.5mm, crushed stone with the grain diameter of 9.5-19mm, crushed stone with the grain diameter of 4.75-9.5mm, crushed stone with the grain diameter of 2.36-4.75mm, machine-made sand and mineral powder.

2. The asphalt mixture modified with the waste basalt fiber-reinforced composite according to claim 1, wherein the basalt fiber-reinforced composite has a particle length of 6 to 12 mm.

3. The asphalt mixture modified with the waste basalt fiber-reinforced composite material according to claim 1, wherein the mineral aggregate comprises crushed stone having a particle size of 19 to 26.5mm, crushed stone having a particle size of 9.5 to 19mm, crushed stone having a particle size of 4.75 to 9.5mm, crushed stone having a particle size of 2.36 to 4.75mm, machine-made sand, and mineral powder in a weight ratio of 100: (440-500): (250-300): (100-150): (400-450): (40-60).

4. The asphalt mixture modified with the waste basalt fiber-reinforced composite material according to claim 3, wherein the mineral aggregate comprises crushed stone having a particle size of 19 to 26.5mm, crushed stone having a particle size of 9.5 to 19mm, crushed stone having a particle size of 4.75 to 9.5mm, crushed stone having a particle size of 2.36 to 4.75mm, machine-made sand, and mineral powder in a weight ratio of 100: 450: 293: 136: 429: 50.

Technical Field

The invention belongs to the technical field of building materials, and particularly relates to a modified asphalt mixture, in particular to an asphalt mixture modified by using a waste basalt fiber reinforced composite material.

Background

With the rapid development of traffic infrastructure in China, the use amount of asphalt mixture in the fields of expressways and express railways is larger and larger, and particularly, the problems of increasing of large-span bridges, increasing of traffic volume, increasing of axle weight, traffic canalization and the like are solved, so that higher requirements are provided for high-grade asphalt bridge decks and pavements. The method aims to better improve the use quality of the asphalt pavement and prolong the service life of the pavement, so that the improvement of the investment benefit is an important subject before the workers on the roads. In addition, under the combined action of high temperature and heavy load, ruts become one of the typical diseases of the expressway in China. Asphalt mixtures are typically simple thermorheological materials, the mechanical properties of which are highly sensitive to temperature and the manner of loading and the magnitude of the load. The asphalt pavement structure layer bears the direct action of various vehicle loads under the high-temperature condition, particularly on the road sections with slow driving speed, large flow and heavy load, the asphalt pavement is in a complex stress-strain state, and under the repeated action of horizontal force and vertical force, the asphalt pavement is easy to generate flow deformation and generate permanent deformation and plastic flow under the high-temperature state, so that the concave-convex deformation of the surface layer structure layer is caused, particularly under the frequent action of channelized traffic and large overload axle load, the asphalt pavement structure layer plays a role of wave pushing and wave assisting in rolling on the permanent deformation of the asphalt concrete pavement, and the formation of tracks on the asphalt concrete pavement is accelerated. At present, ruts become one of the typical diseases of highways.

The basalt fiber is a novel inorganic environment-friendly green high-performance fiber material, and is formed by drawing pure natural basalt stone at high temperature through a platinum wire drawing bushing. Basalt fibers are taken as four major fibers for key development in China, and basalt continuous fibers are widely applied to various aspects of fiber reinforced composite materials, friction materials, shipbuilding materials, heat insulation materials, automobile industry, high-temperature filter fabrics, protection fields and the like. The basalt fiber reinforced composite material is a light, high-strength and corrosion-resistant composite material which is prepared by taking basalt fibers as a reinforcing material and thermosetting resin (such as vinyl resin, epoxy resin and the like) as a matrix material and heating and curing at a high temperature. The reinforced composite material made of the basalt fiber has high strength, high chemical stability and good electrical insulation performance, and is widely applied to various fields of civil economy, such as civil engineering, traffic, energy, petrochemical industry, light weight of automobiles, ships, aerospace and the like. The waste basalt fiber reinforced composite material has adverse effects on the environment, and a method for effectively recycling the basalt fiber reinforced composite material is not available at present.

Disclosure of Invention

The invention aims to solve the problems that the rutting problem of an asphalt concrete pavement is serious and the waste basalt fiber reinforced composite material pollutes the environment in the prior art, and provides an asphalt mixture modified by the waste basalt fiber reinforced composite material.

Technical scheme

A modified asphalt mixture made of waste basalt fiber reinforced composite materials comprises the following components in parts by weight: 4-6 parts of asphalt, 0.2-0.4 part of waste basalt fiber reinforced composite material and 93-95 parts of mineral aggregate; the basalt fiber reinforced composite material is basalt fiber reinforced vinyl resin or basalt fiber reinforced epoxy resin.

The mineral aggregate is composed of crushed stone with the grain diameter of 19-26.5mm, crushed stone with the grain diameter of 9.5-19mm, crushed stone with the grain diameter of 4.75-9.5mm, crushed stone with the grain diameter of 2.36-4.75mm, machine-made sand and mineral powder.

Further, the particle length of the basalt fiber reinforced composite material is 6-12 mm.

Further, in the mineral aggregate, the weight ratio of crushed stone with the grain diameter of 19-26.5mm, crushed stone with the grain diameter of 9.5-19mm, crushed stone with the grain diameter of 4.75-9.5mm, crushed stone with the grain diameter of 2.36-4.75mm, machine-made sand and mineral powder is 100: (440-500): (250-300): (100-150): (400-450): (40-60), more preferably 100: 450: 293: 136: 429: 50.

the preparation method of the asphalt mixture modified by the waste basalt fiber reinforced composite material comprises the following steps: mixing the waste basalt fiber reinforced composite material with crushed stone with the particle size of 19-26.5mm, crushed stone with the particle size of 9.5-19mm, crushed stone with the particle size of 4.75-9.5mm, crushed stone with the particle size of 2.36-4.75mm and machine-made sand for 60-90s in a dry manner, adding asphalt, mixing for 80-100s, adding mineral powder, and mixing for 80-100s to obtain a modified asphalt mixture.

The invention has the beneficial effects that: the invention provides a modified asphalt mixture, which recycles waste basalt fiber reinforced composite materials (waste products and waste materials produced in the production process of the basalt fiber reinforced composite materials or waste materials after the basalt fiber reinforced composite materials are in service), and greatly improves the road performances of the asphalt mixture, such as the anti-rutting performance, the low-temperature crack resistance and the like, because the reinforced resin on the surface of the basalt fiber reinforced composite materials has good compatibility with asphalt and the effects of reinforcement and toughening are realized between the fiber and the asphalt.

Detailed Description

The technical solution of the present invention is further illustrated by the following specific examples. In the following examples, the waste basalt fiber reinforced composite material is waste basalt fiber reinforced epoxy resin, and is waste products and waste materials produced in the production process of the basalt fiber reinforced epoxy resin.

Example 1

A modified asphalt mixture made of waste basalt fiber reinforced composite materials comprises the following components in parts by weight: 5 parts of asphalt, 0.3 part of waste basalt fiber reinforced composite material (the waste basalt fiber reinforced composite material is crushed into particles with the length of 6 mm), and 94 parts of mineral aggregate;

the mineral aggregate consists of crushed stone with the particle size of 19-26.5mm, crushed stone with the particle size of 9.5-19mm, crushed stone with the particle size of 4.75-9.5mm, crushed stone with the particle size of 2.36-4.75mm, machine-made sand and mineral powder, wherein in the mineral aggregate, the weight ratio of the crushed stone with the particle size of 19-26.5mm, the crushed stone with the particle size of 9.5-19mm, the crushed stone with the particle size of 4.75-9.5mm, the crushed stone with the particle size of 2.36-4.75mm, the machine-made sand and the mineral powder is 100: 492: 284: 102: 450: 55.

the preparation method of the modified asphalt mixture comprises the following steps: the basalt fiber reinforced composite material is dry-mixed with crushed stone with the grain diameter of 19-26.5mm, crushed stone with the grain diameter of 9.5-19mm, crushed stone with the grain diameter of 4.75-9.5mm, crushed stone with the grain diameter of 2.36-4.75mm and machine-made sand for 60-90s, then added with asphalt and mixed for 80-100s, and finally added with mineral powder and mixed for 80-100s, so as to obtain the modified asphalt mixture.

Example 2

A modified asphalt mixture made of waste basalt fiber reinforced composite materials comprises the following components in parts by weight: 4 parts of asphalt, 0.4 part of waste basalt fiber reinforced composite material (the waste basalt fiber reinforced composite material is crushed into particles with the length of 9 mm), and 95 parts of mineral aggregate;

the mineral aggregate consists of crushed stone with the particle size of 19-26.5mm, crushed stone with the particle size of 9.5-19mm, crushed stone with the particle size of 4.75-9.5mm, crushed stone with the particle size of 2.36-4.75mm, machine-made sand and mineral powder, wherein in the mineral aggregate, the weight ratio of the crushed stone with the particle size of 19-26.5mm, the crushed stone with the particle size of 9.5-19mm, the crushed stone with the particle size of 4.75-9.5mm, the crushed stone with the particle size of 2.36-4.75mm, the machine-made sand and the mineral powder is 100: 450: 293: 136: 429: 50.

the preparation method of the modified asphalt mixture comprises the following steps: the basalt fiber reinforced composite material is dry-mixed with crushed stone with the grain diameter of 19-26.5mm, crushed stone with the grain diameter of 9.5-19mm, crushed stone with the grain diameter of 4.75-9.5mm, crushed stone with the grain diameter of 2.36-4.75mm and machine-made sand for 60-90s, then added with asphalt and mixed for 80-100s, and finally added with mineral powder and mixed for 80-100s, so as to obtain the modified asphalt mixture.

Example 3

A modified asphalt mixture made of waste basalt fiber reinforced composite materials comprises the following components in parts by weight: 6 parts of asphalt, 0.3 part of waste basalt fiber reinforced composite material (the waste basalt fiber reinforced composite material is crushed into particles with the length of 12 mm), and 93 parts of mineral aggregate;

the mineral aggregate consists of crushed stone with the particle size of 19-26.5mm, crushed stone with the particle size of 9.5-19mm, crushed stone with the particle size of 4.75-9.5mm, crushed stone with the particle size of 2.36-4.75mm, machine-made sand and mineral powder, wherein in the mineral aggregate, the weight ratio of the crushed stone with the particle size of 19-26.5mm, the crushed stone with the particle size of 9.5-19mm, the crushed stone with the particle size of 4.75-9.5mm, the crushed stone with the particle size of 2.36-4.75mm, the machine-made sand and the mineral powder is 100: 442: 253: 120: 450: 40.

the preparation method of the modified asphalt mixture comprises the following steps: the basalt fiber reinforced composite material is dry-mixed with crushed stone with the grain diameter of 19-26.5mm, crushed stone with the grain diameter of 9.5-19mm, crushed stone with the grain diameter of 4.75-9.5mm, crushed stone with the grain diameter of 2.36-4.75mm and machine-made sand for 60-90s, then added with asphalt and mixed for 80-100s, and finally added with mineral powder and mixed for 80-100s, so as to obtain the modified asphalt mixture.

Comparative example

The asphalt mixture comprises the following components in parts by weight: 5 parts of asphalt and 94 parts of mineral aggregate; the mineral aggregate consists of crushed stone with the particle size of 19-26.5mm, crushed stone with the particle size of 9.5-19mm, crushed stone with the particle size of 4.75-9.5mm, crushed stone with the particle size of 2.36-4.75mm, machine-made sand and mineral powder, wherein in the mineral aggregate, the weight ratio of the crushed stone with the particle size of 19-26.5mm, the crushed stone with the particle size of 9.5-19mm, the crushed stone with the particle size of 4.75-9.5mm, the crushed stone with the particle size of 2.36-4.75mm, the machine-made sand and the mineral powder is 100: 492: 284: 102: 450: 55.

the preparation method of the asphalt mixture comprises the following steps: the crushed stone with the particle size of 19-26.5mm, the crushed stone with the particle size of 9.5-19mm, the crushed stone with the particle size of 4.75-9.5mm, the crushed stone with the particle size of 2.36-4.75mm and machine-made sand are dry-mixed for 60-90s, then asphalt is added and mixed for 80-100s, and finally the mineral powder is added and mixed for 80-100s, so that the asphalt mixture is obtained.

Road performance testing

The modified asphalt mixtures prepared in examples 1 to 3 and the asphalt mixtures prepared in comparative examples were subjected to a high-temperature rutting resistance test (high-temperature stability), a freeze-thaw splitting test (water stability) and a trabecular bending test (low-temperature crack resistance), and the test methods were referred to road engineering asphalt and asphalt mixture test protocol (JTGE20-2011), and the test results are shown in table 1:

TABLE 1

As can be seen from Table 1, compared with the asphalt mixture of the comparative example, the modified asphalt mixtures of examples 1 to 3 of the present invention have excellent rutting resistance, water stability and low temperature crack resistance, and can improve the road performance of the asphalt mixture, improve the service quality of the asphalt road surface, and prolong the service life of the road surface.