阅读说明：本技术 一种粘层用不粘轮乳化沥青的制备方法 (Preparation method of wheel-sticking-free emulsified asphalt for adhesive layer ) 是由 耿磊 王小虎 张晓敏 于 2020-07-22 设计创作，主要内容包括：本发明公开了一种粘层用不粘轮乳化沥青的制备方法,先制备母体沥青、再制备改性沥青、制备皂液、将皂液和改性沥青混合、研磨、乳化。本发明采用高比例热塑性弹性体作为调节沥青低温性能的改性剂,制备的不粘轮乳化沥青蒸发残留物软化点高达90℃以上,可以提高乳化沥青蒸发残留物的PG等级和60℃的粘结力。(The invention discloses a preparation method of wheel-sticking-free emulsified asphalt for a sticky layer. The invention adopts the high proportion thermoplastic elastomer as the modifier for adjusting the low temperature performance of the asphalt, the softening point of the evaporation residue of the prepared wheel-sticking-free emulsified asphalt reaches more than 90 ℃, and the PG grade and the 60 ℃ binding power of the evaporation residue of the emulsified asphalt can be improved.)

1. A preparation method of wheel-sticking-free emulsified asphalt for a sticky layer is characterized by comprising the following steps: the method comprises the following steps:

(1) preparing parent asphalt: weighing 100 parts of matrix asphalt, 0-7 parts of thermoplastic elastomer, 0-5 parts of polyethylene wax, 0-0.35 part of sulfur and 0-5 parts of rubber oil, heating the matrix asphalt, adding the thermoplastic elastomer and the polyethylene wax into the matrix asphalt, shearing by a high-speed shearing machine, adding the rubber oil and the rubber oil, slowly adding the sulfur after the rubber oil and the rubber oil are completely added, and stirring and developing to prepare matrix asphalt;

(2) preparing modified asphalt: weighing 100 parts of parent asphalt, 0-10 parts of resin and 0-30 parts of special asphalt, heating the parent asphalt, then respectively adding the special asphalt and the resin into the parent asphalt, and stirring and developing to prepare modified asphalt, wherein the special asphalt is rock asphalt, lake asphalt, oxidized asphalt, sulfonated asphalt, 0# asphalt or 10# asphalt;

(3) preparing a soap solution: weighing 100 parts of water, 0-1 part of emulsifier, 0-0.3 part of thickener and 0-0.5 part of hydrochloric acid, respectively adding the emulsifier and the thickener into the water, stirring and mixing, and then adjusting the pH value to 2-2.5 with hydrochloric acid for later use;

(4) and grinding and emulsifying the soap solution and the modified asphalt to obtain a target product.

2. The method for preparing wheel-nonstick emulsified asphalt for a bonding layer according to claim 1, wherein the method comprises the following steps: the matrix asphalt in the step (1) is 70# matrix asphalt.

3. The method for preparing wheel-nonstick emulsified asphalt for a bonding layer according to claim 1, wherein the method comprises the following steps: the thermoplastic elastomer in the step (1) is one or a mixture of any two of a styrene and butadiene block copolymer SBS, a styrene butadiene rubber SBR, a hydrogenated styrene-butadiene block copolymer SEBS, a styrene-ethylene-propylene-styrene type block copolymer SEPS, a styrene-isoprene-styrene triblock copolymer SIS and a hydrogenated styrene-isoprene-styrene triblock copolymer hydrogenated SIS.

4. The method for preparing wheel-nonstick emulsified asphalt for a bonding layer according to claim 1, wherein the method comprises the following steps: the rubber oil in the step (1) is one or two of shell371, sun235, mastic YT-6, mastic YT-10, medium oil KN4006, medium oil KN4008 and medium oil KN 4010.

5. The method for preparing wheel-nonstick emulsified asphalt for a bonding layer according to claim 1, wherein the method comprises the following steps: the resin in the step (1) is rosin resin, terpene resin, C5 petroleum resin, C9 petroleum resin, C5 hydrogenated petroleum resin, C9 hydrogenated petroleum resin, C5 modified C9 resin, C9 modified C5 resin, coumarone resin, piperylene resin, dicyclopentadiene resin or fumaric acid modified petroleum resin.

6. The method for preparing wheel-nonstick emulsified asphalt for a bonding layer according to claim 1, wherein the method comprises the following steps: the thickening agent in the step (3) is sodium carboxymethylcellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, CaCl₂、NH₄One or a mixture of any two of Cl.

7. The method for preparing wheel-nonstick emulsified asphalt for a bonding layer according to claim 1, wherein the method comprises the following steps: the spreading amount of the wheel-sticking-free emulsified asphalt is 0.3kg/m²-0.6kg/m²。

Technical Field

The invention relates to a preparation method of asphalt, in particular to a preparation method of wheel-sticking-free emulsified asphalt for a sticky layer.

Background

The emulsified asphalt without sticking wheel is a kind of polymer modified emulsified asphalt, which is a new type of composite waterproof paint made up by using petroleum asphalt as main raw material, surfactant and various chemical assistants as auxiliary raw material, and then adding high-molecular polymer to modify asphalt and emulsify. The waterproof paint is an emulsion type waterproof paint which can be sprayed, roll-coated or manually brushed, and a high-molecular modified asphalt film is formed through the processes of approaching solid particles, contact deformation and the like by demulsification water evaporation, so that the waterproof paint is a seamless complete waterproof and moistureproof polymer modified emulsified asphalt waterproof film. The adhesive can be constructed on various wet or dry base surfaces, has good bonding performance with the base layers, is non-toxic and pollution-free, is convenient to construct, and has good affinity and bonding force with cement concrete and asphalt concrete.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to provide a preparation method of wheel-bonding-free emulsified asphalt for a bonding layer, which can improve the PG grade of emulsified asphalt evaporation residues and the bonding force at 60 ℃.

The technical scheme is as follows: the invention provides a preparation method of wheel-sticking-free emulsified asphalt for a sticky layer, which comprises the following steps:

(1) preparing parent asphalt: weighing 100 parts of matrix asphalt, 0-7 parts of thermoplastic elastomer, 0-5 parts of polyethylene wax, 0-0.35 part of sulfur and 0-5 parts of rubber oil, heating the matrix asphalt, adding the thermoplastic elastomer and the polyethylene wax into the matrix asphalt, shearing by a high-speed shearing machine, adding the rubber oil and the rubber oil, slowly adding the sulfur after the rubber oil and the rubber oil are completely added, and stirring and developing to prepare matrix asphalt;

(2) preparing modified asphalt: weighing 100 parts of parent asphalt, 0-10 parts of resin and 0-30 parts of special asphalt, heating the parent asphalt, then respectively adding the special asphalt and the resin into the parent asphalt, and stirring and developing to prepare modified asphalt, wherein the special asphalt is rock asphalt, lake asphalt, oxidized asphalt, sulfonated asphalt, 0# asphalt or 10# asphalt;

(3) preparing a soap solution: weighing 100 parts of water, 0-1 part of emulsifier, 0-0.3 part of thickener and 0-0.5 part of hydrochloric acid, respectively adding the emulsifier and the thickener into the water, stirring and mixing, and then adjusting the pH value to 2-2.5 with hydrochloric acid for later use;

(4) and grinding and emulsifying the soap solution and the modified asphalt to obtain a target product.

Further, the base asphalt in the step (1) is 70# base asphalt.

Further, the thermoplastic elastomer in the step (1) is one or a mixture of any two of a styrene-butadiene block copolymer SBS, a styrene butadiene rubber SBR, a hydrogenated styrene-butadiene block copolymer SEBS, a styrene-ethylene-propylene-styrene type block copolymer SEPS, a styrene-isoprene-styrene triblock copolymer SIS, and a hydrogenated styrene-isoprene-styrene triblock copolymer hydrogenated SIS.

Further, the rubber oil in the step (1) is one or two of shell371, sun235, mastic YT-6, mastic YT-10, medium oil KN4006, medium oil KN4008 and medium oil KN 4010.

Further, the resin in the step (1) is rosin resin, terpene resin, C5 petroleum resin, C9 petroleum resin, C5 hydrogenated petroleum resin, C9 hydrogenated petroleum resin, C5 modified C9 resin, C9 modified C5 resin, coumarone resin, piperylene resin, dicyclopentadiene resin, fumaric acid modified petroleum resin.

Further, the thickening agent in the step (3) is sodium carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, hydroxypropyl cellulose, CaCl₂、NH₄One or a mixture of any two of Cl.

Further, the spreading amount of the wheel-sticking-free emulsified asphalt is 0.3kg/m²-0.6kg/m²。

Has the advantages that: the invention adopts the high proportion thermoplastic elastomer as the modifier for adjusting the low temperature performance of the asphalt, and the softening point of the evaporation residue of the prepared wheel-sticking-free emulsified asphalt reaches more than 90 ℃. The emulsified asphalt evaporation residue has higher low-temperature grade and better elastic recovery, and the Brookfield viscosity at 60 ℃ is more than 20000Pa s. The introduction of the high molecular elastomer can increase the viscosity of the asphalt, thereby promoting the high-temperature performance softening point of the asphalt to be higher, and the low-temperature performance of the evaporation residue of the emulsified asphalt can be greatly improved because the high molecular elastomer does not contain styrene groups and has low glass transition temperature.

Detailed Description