CN110591393A - Environment-friendly modified asphalt for micro surfacing - Google Patents

Abstract

The invention discloses environment-friendly modified asphalt for micro surfacing, which solves the problems of insufficient deformation resistance, too long forming time, unsatisfactory road performance and the like of emulsified asphalt in the prior art. The invention comprises the following components in parts by weight: 3-5 parts of cationic styrene-butadiene latex, 1.5-2.5 parts of neoprene latex, 2.5-3 parts of oleyl propylene diamine, 1.8-2.2 parts of industrial hydrochloric acid, 1.6-2.0 parts of Mqk-1m, 1.5-2.5 parts of PAMAM and 15-20 parts of matrix asphalt. The invention has the advantages of strong adaptability, quick forming, good cohesive force and dressing property, long storage time and the like.

Description

Environment-friendly modified asphalt for micro surfacing

Technical Field

The invention relates to asphalt, in particular to environment-friendly modified asphalt for micro surfacing.

Background

Micro-surfacing is a more advanced preventative maintenance method developed on the basis of slurry seals. The working principle is that stone chips or sand, filler (cement, lime, fly ash, stone powder, etc.), polymer modified emulsified asphalt, additive and water are mixed according to a certain proportion to form a flowing mixture, and then the mixture is uniformly spread on the road surface to form a sealing layer. The micro-surfacing has the characteristics of economy, energy conservation, environmental protection and safety, so that the micro-surfacing becomes an effective preventive maintenance mode and is widely applied to the road surface maintenance of the highway in China.

The emulsified asphalt has the advantages of energy and asphalt saving, environmental protection, safety, wide application, convenient use, ideal road effect and the like. Emulsified asphalt is the best binder for micro surfacing. At present, the production base of emulsified asphalt in China is distributed all over the country. The road maintenance industry has been developing to make the demand of high-performance emulsified asphalt increase greatly.

The development of high concentration, high stability and ultrafine particle of the emulsified asphalt puts higher requirements on the used emulsifier. The domestic emulsifier is developed to a certain extent, but the emulsifier still has the defects of few varieties, unstable quality, low solid content, short storage time, strong smell and environmental pollution.

The modified emulsified asphalt is prepared by mixing emulsified asphalt as a base material, a high molecular polymer (rubber latex) as an added modifying material, a dispersion stabilizer or other compounding agents in a proper amount and mixing the materials together under certain process conditions to obtain a stable polymer modified asphalt mixed emulsion with certain characteristics, namely the polymer modified asphalt.

In the prior art, in order to ensure the performance, the polymer modified asphalt is usually prepared by adopting materials which are not beneficial to environmental protection, and the prepared emulsified modified asphalt has the problems of insufficient deformation resistance, too long forming time, unsatisfactory road performance and the like.

Disclosure of Invention

The invention aims to solve the problems of insufficient deformation resistance, too long forming time, unsatisfactory road performance and the like of the emulsified modified asphalt in the prior art; provides an environment-friendly modified asphalt for micro surfacing, which solves the problems.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the environment-friendly modified asphalt for micro surfacing comprises the following components in parts by weight:

3-5 parts of cationic styrene-butadiene latex, 1.5-2.5 parts of neoprene latex, 2.5-3 parts of oleyl propylene diamine, 1.8-2.2 parts of industrial hydrochloric acid, 1.6-2.0 parts of Mqk-1m, 1.5-2.5 parts of PAMAM and 15-20 parts of matrix asphalt.

Because the emulsifying effect of a single emulsifier is not ideal, better effect can be achieved if other emulsifiers or auxiliary agents are added. The invention screens out the components which are matched with each other through long-term productive technology research and experiments, and the components are compounded with each other, so that the construction requirement is met, the production cost of the emulsified asphalt can be effectively reduced, and the effect is obvious.

Moreover, all the components of the invention are environment-friendly materials, have no smell or little smell, do not influence the environment after being used, and have excellent environment-friendly effect. Moreover, the emulsifier prepared by the invention has good emulsifying effect and good stability, can greatly prolong the storage time and has very remarkable effect.

Meanwhile, the invention has the advantages of controllable demulsification speed and adjustable adaptability, various performance tests of the emulsified asphalt can meet the requirements of 'technical specification for highway asphalt pavement construction', and the solid content can reach more than 65%; the standard viscosity can meet the standard requirement of determining the rotational viscosity of the asphalt binder by the American AASHTO T316-2006 standard method, and the spraying is not influenced by the viscosity according to the experience of engineering practice.

The modified asphalt prepared by the invention has the advantages of strong adaptability, quick forming, good cohesive force and dressing property, long storage time and the like.

Further, the concentration of the industrial hydrochloric acid is 30-40%.

Further, the PAMAM is modified hyperbranched polyamide-amine.

Furthermore, the specific preparation process of the modified hyperbranched polyamide-amine is as follows:

(1) synthesizing AB by Michael addition reaction of diethylenetriamine and methyl acrylate₂The mass ratio of the diethylenetriamine to the methyl acrylate is 1: 1-1.2;

(2)AB₂the type monomer is subjected to self melt polycondensation reaction to synthesize hyperbranched polyamide-amine;

(3) carrying out amidation reaction on hyperbranched polyamide-amine and oleic acid, wherein the ratio of the amount of a substance of primary amine to the amount of a substance of oleic acid in the hyperbranched polyamide-amine is 1: 1-1.2.

Preferably, the invention comprises the following components in parts by weight:

4.2 parts of cationic styrene-butadiene latex, 1.8 parts of neoprene latex, 2.7 parts of oleyl propylene diamine, 2.1 parts of industrial hydrochloric acid, 1.6 parts of Mqk-1m, 2.2 parts of PAMAM and 18 parts of matrix asphalt.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. through the mutual compounding of the components, the standard viscosity can meet the standard requirement of the American AASHTO T316-;

2. the components of the invention are environment-friendly materials, have no smell or little smell, do not influence the environment after being used, and have excellent environment-friendly effect;

3. the emulsifier prepared by the invention has good emulsifying effect and good stability, can greatly prolong the storage time and has very obvious effect.

Detailed Description

The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.

Example 1

The environment-friendly modified asphalt for micro surfacing comprises the following components in parts by weight:

3-5 parts of cationic styrene-butadiene latex, 1.5-2.5 parts of neoprene latex, 2.5-3 parts of oleyl propylene diamine, 1.8-2.2 parts of industrial hydrochloric acid, 1.6-2.0 parts of Mqk-1m, 1.5-2.5 parts of PAMAM and 15-20 parts of matrix asphalt.

The concrete proportions of the components in the embodiment are as follows: 4.2 parts of cationic styrene-butadiene latex, 1.8 parts of neoprene latex, 2.7 parts of oleyl propylene diamine, 2.1 parts of industrial hydrochloric acid, 1.6 parts of Mqk-1m, 2.2 parts of PAMAM and 18 parts of matrix asphalt.

Firstly, preparing a modified emulsifier, wherein the specific preparation method of the modified emulsifier is as follows:

(1) dissolving 1.6-2.0 parts of Mqk-1m and 2.5-3 parts of oleyl propylene diamine in 1.8-2.2 parts of industrial hydrochloric acid to obtain a first mixed solution for later use;

(2) 3-5 parts of cationic styrene-butadiene latex and 1.5-2.5 parts of neoprene latex are uniformly mixed to obtain a second mixed solution for later use;

(3) mixing the mixed solution I, the mixed solution II and the PAMAM, and stirring uniformly;

secondly, preparing the modified asphalt, wherein the specific preparation method comprises the following steps:

and (3) putting the base asphalt heated to 130-140 ℃ into an emulsifying machine, starting the emulsifying machine, and simultaneously adding the modified emulsifying agent and the base asphalt into the emulsifying machine to complete emulsification so as to prepare the modified asphalt.

Example 2

The difference between this embodiment and embodiment 1 is that the composition of each substance is optimized in this embodiment, and the specific settings are as follows:

the concentration of the industrial hydrochloric acid is 30-40%.

The PAMAM is modified hyperbranched polyamide-amine. The specific preparation process of the modified hyperbranched polyamide-amine comprises the following steps:

(1) synthesizing AB by Michael addition reaction of diethylenetriamine and methyl acrylate₂The mass ratio of the diethylenetriamine to the methyl acrylate is 1: 1-1.2;

(2)AB₂the type monomer is subjected to self melt polycondensation reaction to synthesize hyperbranched polyamide-amine;

(3) carrying out amidation reaction on hyperbranched polyamide-amine and oleic acid, wherein the ratio of the amount of a substance of primary amine to the amount of a substance of oleic acid in the hyperbranched polyamide-amine is 1: 1-1.2.

The above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the scope of the present invention, but all the modifications made by the principles of the present invention and the non-inventive efforts based on the above-mentioned embodiments shall fall within the scope of the present invention.

Claims (5)

1. The environment-friendly modified asphalt for micro surfacing is characterized by comprising the following components in parts by weight:

3-5 parts of cationic styrene-butadiene latex, 1.5-2.5 parts of neoprene latex, 2.5-3 parts of oleyl propylene diamine, 1.8-2.2 parts of industrial hydrochloric acid, 1.6-2.0 parts of Mqk-1m, 1.5-2.5 parts of PAMAM and 15-20 parts of matrix asphalt.

2. The environment-friendly modified asphalt for micro-surfacing according to claim 1, wherein the concentration of the industrial hydrochloric acid is 30-40%.

3. The environmentally friendly modified asphalt for micro surfacing according to claim 1, wherein the PAMAM is a modified hyperbranched polyamidoamine.

4. The environment-friendly modified asphalt for micro-surfacing according to claim 3, wherein the specific preparation process of the modified hyperbranched polyamidoamine is as follows:

(1) synthesizing AB by Michael addition reaction of diethylenetriamine and methyl acrylate₂The mass ratio of the diethylenetriamine to the methyl acrylate is 1: 1-1.2;

(2)AB₂the type monomer is subjected to self melt polycondensation reaction to synthesize hyperbranched polyamide-amine;

(3) carrying out amidation reaction on hyperbranched polyamide-amine and oleic acid, wherein the ratio of the amount of a substance of primary amine to the amount of a substance of oleic acid in the hyperbranched polyamide-amine is 1: 1-1.2.

5. The environment-friendly modified asphalt for micro-surfacing according to any one of claims 1 to 4, characterized by comprising the following components in parts by weight:

4.2 parts of cationic styrene-butadiene latex, 1.8 parts of neoprene latex, 2.7 parts of oleyl propylene diamine, 2.1 parts of industrial hydrochloric acid, 1.6 parts of Mqk-1m, 2.2 parts of PAMAM and 18 parts of matrix asphalt.