阅读说明：本技术 一种新型沥青基发泡灌缝胶 (Novel asphalt-based foaming crack pouring adhesive ) 是由 刘汉超 鞠昌兵 叶雨 范永通 滕新华 张凯华 于 2020-11-24 设计创作，主要内容包括：本发明涉及一种新型沥青基发泡灌缝胶,包括A、B两个组分,A组分包括：沥青、环氧树脂、改性剂、增容剂、聚醚多元醇、填料、水,B组分包括聚氨酯预聚体。本发明的新型沥青基发泡灌缝胶将环氧树脂与改性剂、沥青、聚醚多元醇等混合加热,反应后得到A组分,再与B组分,即聚氨酯预聚体进行共混,得到沥青基发泡灌缝胶。A、B组分混合后,聚氨酯预聚体的异氰酸基与羟基和水发生反应,形成交联体系,并同时发泡；另一方面,环氧树脂固化形成网络结构,为体系提供强度和粘接性,得到性能优异的发泡灌缝胶。本发明的新型沥青基发泡灌缝胶与传统灌缝胶相比,无需加热设备,能耗低,经济环保,性能优异,灌缝胶与裂缝壁面粘接牢固,不易脱粘开裂。(The invention relates to a novel asphalt-based foaming crack pouring sealant, which comprises A, B two components, wherein the A component comprises: asphalt, epoxy resin, a modifier, a compatibilizer, polyether polyol, a filler and water, wherein the component B comprises a polyurethane prepolymer. The novel asphalt-based foaming crack pouring adhesive is prepared by mixing and heating epoxy resin, a modifier, asphalt, polyether polyol and the like, reacting to obtain a component A, and blending the component A with a component B, namely a polyurethane prepolymer to obtain the asphalt-based foaming crack pouring adhesive. A. After the component B is mixed, the isocyanate group of the polyurethane prepolymer reacts with hydroxyl and water to form a crosslinking system and simultaneously foams; on the other hand, the epoxy resin is cured to form a network structure, so that the strength and the adhesion are provided for the system, and the foaming crack pouring sealant with excellent performance is obtained. Compared with the traditional crack pouring adhesive, the novel asphalt-based foaming crack pouring adhesive disclosed by the invention has the advantages of no need of heating equipment, low energy consumption, economy, environmental friendliness, excellent performance, firm bonding between the crack pouring adhesive and the wall surface of a crack and difficulty in debonding and cracking.)

1. The utility model provides a novel pitch base foaming pouring sealant which characterized in that: is a mixture of A, B two components,

the component A comprises: 5 to 20 parts of asphalt, 5 to 20 parts of epoxy resin, 0.5 to 2 parts of modifier, 2 to 8 parts of compatibilizer, 1 to 6 parts of polyether polyol, 3 to 6 parts of filler and 0.1 to 0.5 part of water,

the component B comprises: 5-12 parts by mass of a polyurethane prepolymer.

2. The novel asphalt-based foaming joint grouting glue of claim 1, characterized in that: the asphalt in the component A is No. 70-90 petroleum asphalt.

3. The novel asphalt-based foaming joint grouting glue of claim 1, characterized in that: the epoxy resin in the component A is one or a mixture of two of bisphenol A and bisphenol F epoxy resins, and the epoxy equivalent is 180-220 g/mol.

4. The novel asphalt-based foaming joint grouting glue of claim 1, characterized in that: the modifier in the component A is one or a mixture of two of diethanolamine and ethanolamine.

5. The novel asphalt-based foaming joint grouting glue of claim 1, characterized in that: the compatibilizer in the component A is dibutyl phthalate.

6. The novel asphalt-based foaming joint grouting glue of claim 1, characterized in that: the polyether polyol in the component A is polyethylene glycol, and the molecular weight of the polyethylene glycol is 2000-5000 g/mol.

7. The novel asphalt-based foaming joint grouting glue of claim 1, characterized in that: the filler in the component A is any one or a mixture of kaolin, bentonite, calcium carbonate, talcum powder and fly ash.

8. The novel asphalt-based foaming joint grouting glue of claim 1, characterized in that: the polyurethane prepolymer in the component B is polyether type isocyanate group terminated prepolymer.

Technical Field

The invention relates to the technical field of pavement maintenance, in particular to a novel asphalt-based foaming crack pouring adhesive.

Background

Cracks, one of the main forms of pavement damage. The continuity, integrity and aesthetic property of the pavement are affected when the pavement cracks are generated in the early stage; rainwater enters the surface layer through the cracks, so that the adhesion between asphalt and aggregate is reduced, and further more cracks and pits are generated on the pavement; the rainwater can make the basic unit soften after passing the surface course and getting into the basic unit, reduces basic unit bearing capacity, makes the road surface produce the crowded thick liquid very easily under the vehicle load effect. Softening of the subgrade can cause potholes and collapse in the pavement, greatly impairing pavement performance.

The repair of pavement cracks is usually realized by adopting crack pouring glue. The crack pouring glue is generally prepared by taking asphalt as a matrix and adding a polymer for modification so as to improve the performance of the crack pouring glue. For example, in the Chinese patent with the application number of 201910399225.1, the SBS modified asphalt crack pouring adhesive is mixed with the modified nano-silica to prepare the durable and high-performance crack pouring adhesive; for another example, chinese patent No. 201210262849.7 discloses a road surface crack pouring sealant, which is composed of a compatilizer, a modifier, a stabilizer and a matrix asphalt, and can achieve a repairing effect by being heated and poured into cracks.

However, despite the widespread use, the currently used caulking compound has a number of disadvantages: firstly, the modified asphalt crack pouring sealant has low molecular polarity and poor cohesiveness, is easy to be debonded from the road surface, and further causes repair failure. Secondly, need carry out high temperature heating to the cementation of fissures glue when using, the power consumption is very big, and can volatilize pungent smell, is unfavorable for the environmental protection. Aiming at the problem, the Chinese patent with application number 201310022528.4 discloses an environment-friendly medium-temperature pavement crack pouring sealant and a preparation method thereof, wherein components such as petroleum asphalt, waste tire rubber powder and a styrene-butadiene-styrene block copolymer are adopted, so that the construction temperature is reduced, the material fluidity is improved, but the medium-temperature crack pouring sealant still needs to be heated to about 100 ℃, and the energy consumption is inevitable; for another example, chinese patent application No. 201910369006.9 discloses a polyurethane one-component liquid crack pouring sealant for roads and a preparation method thereof, wherein heating is not required during use, and the sealant has excellent adhesion, but is expensive and low in cost performance.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: most of the existing crack pouring adhesives need high-temperature heating for pouring, the bonding force is low, a high cost performance solving means is lacked, and in order to overcome the defects existing in the prior art, a novel asphalt-based foaming crack pouring adhesive is provided.

The technical scheme adopted by the invention is as follows: a novel asphalt-based foaming crack pouring adhesive is a mixture of A, B two components,

the component A comprises: 5 to 20 parts of asphalt, 5 to 20 parts of epoxy resin, 0.5 to 2 parts of modifier, 2 to 8 parts of compatibilizer, 1 to 6 parts of polyether polyol, 3 to 6 parts of filler and 0.1 to 0.5 part of water,

the component B comprises: 5-12 parts by mass of a polyurethane prepolymer.

The asphalt in the component A is No. 70-90 petroleum asphalt.

The epoxy resin in the component A is one or a mixture of two of bisphenol A and bisphenol F epoxy resins, and the epoxy equivalent is 180-220 g/mol.

The modifier in the component A is one or a mixture of two of diethanolamine and ethanolamine.

The compatibilizer in the component A is dibutyl phthalate.

The polyether polyol in the component A is polyethylene glycol, and the molecular weight of the polyethylene glycol is 2000-5000 g/mol.

The filler in the component A is any one or a mixture of kaolin, bentonite, calcium carbonate, talcum powder and fly ash.

The polyurethane prepolymer in the component B is polyether type isocyanate group terminated prepolymer.

When the novel asphalt-based foaming crack pouring sealant is prepared, the preparation method of A, B comprises the following steps:

the preparation method of the component A comprises the following steps: mixing 5-20 parts by mass of epoxy resin and 0.5-2 parts by mass of modifier, stirring for 1-2 hours at 60-80 ℃, adding 0.1-0.5 part by mass of water into a system after the reaction is finished, then adding 2-8 parts by mass of compatibilizer, 5-20 parts by mass of asphalt, 1-6 parts by mass of polyethylene glycol and 3-6 parts by mass of filler, fully stirring to obtain a component A, and sealing and storing.

The preparation method of the component B comprises the following steps: 5-12 parts by mass of polyurethane prepolymer as component B, and sealing and storing.

Preferably, A, B the two components are prepared as follows:

the preparation method of the component A comprises the following steps: mixing 10 parts by mass of epoxy resin and 1 part by mass of diethanolamine, stirring for 1.5 hours at 65 ℃, adding 0.3 part by mass of water into a system after the reaction is finished, then adding 5 parts by mass of dibutyl phthalate, 13 parts by mass of No. 70 petroleum asphalt, 4 parts by mass of polyethylene glycol with the molecular weight of 2000g/mol and 3 parts by mass of bentonite, fully stirring to obtain a component A, and sealing and storing;

the preparation method of the component B comprises the following steps: 9 parts by mass of polyurethane prepolymer is component B, and the component B is sealed and stored.

When the asphalt-based foaming crack pouring sealant is used, the prepared A, B components are completely and uniformly mixed to obtain the foaming crack pouring sealant, and the obtained asphalt-based foaming crack pouring sealant is poured into cracks.

The novel asphalt-based foaming crack pouring adhesive disclosed by the invention takes petroleum asphalt as a matrix, and the viscosity of the asphalt crack pouring adhesive is reduced by adding the epoxy resin and the polyethylene glycol, so that the crack pouring adhesive can be poured without high-temperature heating, and the novel asphalt-based foaming crack pouring adhesive is energy-saving and environment-friendly; through the reaction of the polyurethane prepolymer with polyethylene glycol and epoxy resin molecules, an elastic three-dimensional network structure is formed, and the asphalt component is coated in a cross-linked network, so that the loss of the joint sealant caused by the temperature rise in summer can be prevented, the elasticity can be improved, and the problem of cracking of the joint sealant in winter is solved; polar groups on epoxy and polyurethane molecular chains can obviously improve the cohesiveness of the system and effectively prevent the premature debonding failure of the crack pouring glue; after the system is foamed, pavement cracks can be quickly filled, the foaming rate is high, the cost is effectively reduced, the economy is good, and the practicability is high.

Compared with the prior art, the invention has the following advantages:

1. according to the asphalt-based foaming crack pouring adhesive, the epoxy resin, the polyethylene glycol and the asphalt are blended, so that the system viscosity is reduced, high-temperature heating is not needed during construction, the asphalt-based foaming crack pouring adhesive has good fluidity, the energy consumption is reduced, the energy is saved, the environment is protected, and the slurry can permeate into small cracks to realize repair;

2. according to the asphalt-based foaming crack pouring adhesive disclosed by the invention, the epoxy resin is modified by using the modifier, so that the epoxy resin can be compatible with a foaming agent (water), the reactivity with a polyurethane prepolymer can be improved, a three-dimensional elastic cross-linking network can be formed after the epoxy resin is poured, the crack pouring adhesive can be prevented from losing, the elasticity can be improved, and the problem that the crack pouring adhesive is easy to crack at low temperature is solved;

3. the asphalt-based foaming crack pouring adhesive disclosed by the invention takes water as a foaming agent, so that the environmental friendliness is good; when the crack filling agent is used, less slurry is poured into the crack, the crack can be filled after foaming, the operation is simple, the cost is greatly reduced, and the problems that the polymer crack filling agent is good in performance, expensive in price and difficult to apply on a large scale are solved;

4. according to the asphalt-based foaming joint grouting adhesive disclosed by the invention, the polarity of a joint grouting adhesive system is obviously improved due to the introduction of epoxy and polyurethane networks, so that the cohesiveness of the joint grouting adhesive with the wall surface of a road crack and the pavement is greatly improved, the joint grouting adhesive is effectively prevented from being debonded and failed too early, and the service life of the joint grouting adhesive is prolonged.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the embodiments of the present invention, but the scope of the present invention is not limited to the following examples.

Example 1

The preparation method of the component A comprises the following steps:

mixing 5 parts by mass of bisphenol A epoxy resin and 0.5 part by mass of ethanolamine, stirring for 2 hours at 60 ℃, adding 0.1 part by mass of water into a system after the reaction is finished, then adding 2 parts by mass of dibutyl phthalate, 5 parts by mass of No. 70 petroleum asphalt, 2 parts by mass of polyethylene glycol with the molecular weight of 2000g/mol and 3 parts by mass of calcium carbonate, fully stirring to obtain a component A, and sealing and storing.

The preparation method of the component B comprises the following steps:

5 parts by mass of polyurethane prepolymer is used as a component B, and the component B is sealed and stored.

And completely and uniformly mixing the prepared A, B components to obtain the asphalt-based foaming crack pouring adhesive. Referring to the standard JT/T740-: expansion ratio: 2 times of the total weight; softening point: heat softened but not flowed; flow value: 0 mm; and (3) low-temperature stretching: three cycles at-10 ℃ with 100% strain.

Example 2

The preparation method of the component A comprises the following steps:

mixing 10 parts by mass of bisphenol A epoxy resin and 1 part by mass of diethanolamine, stirring for 1.5 hours at 65 ℃, adding 0.3 part by mass of water into a system after the reaction is finished, then adding 5 parts by mass of dibutyl phthalate, 13 parts by mass of No. 70 petroleum asphalt, 4 parts by mass of polyethylene glycol with the molecular weight of 2000g/mol and 3 parts by mass of bentonite, fully stirring to obtain a component A, and sealing and storing.

The preparation method of the component B comprises the following steps:

9 parts by mass of polyurethane prepolymer is component B, and the component B is sealed and stored.

And completely and uniformly mixing the prepared A, B components to obtain the asphalt-based foaming crack pouring adhesive. Referring to the standard JT/T740-: expansion ratio: 3 times of the total weight; softening point: heat softened but not flowed; flow value: 0 mm; and (3) low-temperature stretching: three cycles at-10 ℃ with 100% strain.

Example 3

The preparation method of the component A comprises the following steps:

mixing 8 parts by mass of bisphenol A epoxy resin and 1 part by mass of diethanolamine, stirring for 1 hour at 80 ℃, adding 0.2 part by mass of water into a system after the reaction is finished, then adding 5 parts by mass of dibutyl phthalate, 7 parts by mass of No. 90 petroleum asphalt, 1 part by mass of polyethylene glycol with the molecular weight of 2000g/mol and 4 parts by mass of bentonite, fully stirring to obtain a component A, and sealing and storing.

The preparation method of the component B comprises the following steps:

7 parts by mass of polyurethane prepolymer is component B, and the component B is sealed and stored.

And completely and uniformly mixing the prepared A, B components to obtain the asphalt-based foaming crack pouring adhesive. Referring to the standard JT/T740-: expansion ratio: 3.5 times; softening point: heat softened but not flowed; flow value: 0 mm; and (3) low-temperature stretching: three cycles at-10 ℃ with 100% strain.

Example 4

The preparation method of the component A comprises the following steps:

mixing 10 parts by mass of bisphenol A epoxy resin and 1 part by mass of diethanolamine, stirring for 1 hour at 80 ℃, adding 0.3 part by mass of water into a system after the reaction is finished, then adding 5 parts by mass of dibutyl phthalate, 10 parts by mass of No. 70 petroleum asphalt, 4 parts by mass of polyethylene glycol with the molecular weight of 2000g/mol and 4 parts by mass of bentonite, fully stirring to obtain a component A, and sealing and storing.

The preparation method of the component B comprises the following steps:

10 parts by mass of polyurethane prepolymer is used as a component B, and the component B is sealed and stored.

And completely and uniformly mixing the prepared A, B components to obtain the asphalt-based foaming crack pouring adhesive. Referring to the standard JT/T740-: expansion ratio: 3 times of the total weight; softening point: heat softened but not flowed; flow value: 0 mm; and (3) low-temperature stretching: three cycles at-10 ℃ with 100% strain.

Example 5

The preparation method of the component A comprises the following steps:

mixing 20 parts by mass of bisphenol F epoxy resin and 2 parts by mass of diethanolamine, stirring for 1 hour at 80 ℃, adding 0.5 part by mass of water into a system after the reaction is finished, then adding 8 parts by mass of dibutyl phthalate, 20 parts by mass of No. 90 petroleum asphalt, 6 parts by mass of polyethylene glycol with the molecular weight of 5000g/mol and 6 parts by mass of calcium carbonate, fully stirring to obtain a component A, and sealing and storing.

The preparation method of the component B comprises the following steps:

12 parts by mass of polyurethane prepolymer is used as a component B, and the component B is sealed and stored.

And completely and uniformly mixing the prepared A, B components to obtain the asphalt-based foaming crack pouring adhesive. Referring to the standard JT/T740-: expansion ratio: 3 times of the total weight; softening point: heat softened but not flowed; flow value: 0 mm; and (3) low-temperature stretching: three cycles at-10 ℃ with 100% strain.