Preparation method of modified emulsified asphalt for ultra-thin wearing layer

A technology of emulsified asphalt and wear layer, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve the problems of insufficient viscosity, low elasticity and flexibility of asphalt, and low solid content, so as to improve the bonding strength and bonding performance Strong, fast demulsification effect

Inactive Publication Date: 2015-02-11
JIANGSU COING SPECIAL ASPHALT
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the ordinary emulsified asphalt or modified emulsified asphalt used for adhesive layer materials in my country generally has low solid content, insufficient viscosity, and low elasticity and flexibility of asphalt after evaporation.
In order to overcome the current situation of insufficient viscosity of modified emulsified asphalt currently used as a bonding layer, the present invention has developed a modified emulsified asphalt for ultra-thin wear layers, and its various technical indicators are obviously better than ordinary emulsified asphalt. The residue content, softening point, and dynamic viscosity are significantly better than the technical requirements of the current modified emulsified asphalt, and overcome the low solid content and insufficient viscosity of ordinary emulsified asphalt or modified asphalt used as adhesive layer materials, and the asphalt after evaporation. Problems such as low elasticity and flexibility

Method used

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  • Preparation method of modified emulsified asphalt for ultra-thin wearing layer

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Take 10 tons of Sinopec 70# road petroleum asphalt, 360kg SBS (solid styrene-butadiene-styrene polymer thermoplastic rubber), and run it through a colloid mill with a speed of 5000rpm at high speed to control the particle size of SBS to less than 5 μm. Sexual asphalt.

[0022] Get above-mentioned modified asphalt 680kg, 6kg octadecyltrimethylammonium bromide, 1kg calcium chloride and 313kg water standby. Heat the water to 40-60°C, add octadecyltrimethylammonium bromide and calcium chloride, adjust the pH value of the soap liquid to 2.0 with 36% concentrated hydrochloric acid, and prepare the soap liquid. After heating the soap liquid to 50°C, the particles in the soap liquid are dispersed evenly by turning the colloid mill with a speed of 5000rpm at high speed, and then slowly add the modified asphalt heated to 140°C to the running colloid mill, and then Recycle operation until the emulsion is uniformly dispersed, and the obtained emulsion is the modified emulsified as...

Embodiment 2

[0025] Take 10 tons of Korean Ssangyong 70# road petroleum asphalt and 320kg of SBR (latex styrene-butadiene rubber), and run it through a colloid mill with a speed of 5000rpm at high speed to control the SBR particle size to less than 5 μm to obtain modified asphalt.

[0026] Get 670kg of the above-mentioned modified pitch, 5kg of octadecyltrimethylammonium chloride, 0.8kg of polyvinyl alcohol and 324.2kg of water for subsequent use. Heat the water to 40-60°C, add cationic emulsifier and stabilizer, adjust the pH value of the soap solution to 1.8 with 36% concentrated hydrochloric acid, and prepare the soap solution. After heating the soap liquid to 50°C, the particles in the soap liquid are dispersed evenly by rotating the colloid mill at a speed of 4000rpm, and then slowly add the modified asphalt heated to 138°C to the running colloid mill, and then Recycle operation until the emulsion is uniformly dispersed, and the obtained emulsion is the modified emulsified asphalt for...

Embodiment 3

[0029] Take 10 tons of TPC70# road petroleum asphalt, 150kgSBS, 200kgSBR, run through a colloid mill with a rotation speed of 5000rpm at high speed, control the particle size of SBS and SBR to be less than 5μm, and obtain modified asphalt.

[0030] Get above-mentioned modified asphalt 675kg, the mixture of 5.5kg dodecyltrimethylammonium bromide and cetyltrimethylammonium chloride, 1.2kg sodium carboxymethylcellulose and 318.3kg water are standby. Heat the water to 40-60°C, add cationic emulsifier and stabilizer, adjust the pH value of the soap liquid to 2.0 with 36% concentrated hydrochloric acid, and prepare the soap liquid. After heating the soap liquid to 48°C, the particles in the soap liquid are dispersed evenly by turning the colloid mill with a speed of 4000rpm at high speed, and then slowly add the modified asphalt heated to 140°C to the running colloid mill, and then Recycle operation until the emulsion is uniformly dispersed, and the obtained emulsion is the modified...

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Abstract

The invention discloses a preparation method of modified emulsified asphalt for an ultra-thin wearing layer. The preparation method comprises the following steps: (1) preparing materials of asphalt, a modifying agent, a cationic quick-cracking type emulsifying agent and water according to the following matching ratio: 45.0-68.0% of asphalt, 3.0-4.0% of modifying agent, 0.25-0.45% of cationic quick-cracking type emulsifying agent, 0.5-2.0% of stabilizing agent, 1-5% of auxiliary agent and the balance of water; (2) rising the temperature of the asphalt to 160-189 DEG C, adding the modifying agent, stirring uniformly, grinding by a grinding machine, and controlling the particle size of the modifying agent to be less than 5mum, thereby preparing the modified asphalt; (3) adding the emulsifying agent and the stabilizing agent into water with the temperature of 40-60 DEG C, and adjusting the pH value to be 1.5-3 by using the auxiliary agent, thereby preparing soap liquid; and (4) preparing the modified asphalt obtained in the step (2) and the soap liquid in proportion by an emulsifying device. By virtue of the scheme, the obtained modified emulsified asphalt for the ultra-thin wearing layer has the advantages of strong adhesive property, high solid content and fast emulsion-breaking speed.

Description

technical field [0001] The invention relates to the technical field of processing modified emulsified asphalt for road engineering, in particular to a method for preparing modified emulsified asphalt used in ultra-thin wear layers. Background technique [0002] Ultra-thin wear course is a technology that combines discontinuously graded asphalt mixture and emulsified asphalt. Divided from the aspect of construction technology, it can be divided into simultaneous construction of ultra-thin wear layer and step-by-step construction of ultra-thin wear layer. The former refers to the simultaneous construction of emulsified asphalt spreading and asphalt mixture paving; while the latter refers to emulsified asphalt spreading and asphalt mixture paving. Asphalt paving is carried out in stages. Here, the emulsified asphalt not only plays the role of connecting the surface layer and the underlying layer, but more importantly, it can partially enter the upper asphalt mixture and play t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L95/00C08L53/02C08L9/06
Inventor 汪红兵
Owner JIANGSU COING SPECIAL ASPHALT
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