Emulsified asphalt

A technology of emulsified asphalt and asphalt, which is applied in the direction of building components, building insulation materials, buildings, etc., can solve the problems of complex preparation process, narrow temperature adaptability range, and insufficient strength, etc., and achieve simple production and preparation process, convenient transportation and storage , to avoid the effect of corrosion of equipment

Inactive Publication Date: 2008-04-02
张洪武
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing emulsified asphalt does not consider the special requirements of CA mortar in the application of high-speed railway slab ballastless track, such as fluidity, working time, early strength, segregation shrinkage and weather resistance, so if it is used as one of the main components When used in CA mortar, the mortar produced is prone to problems such as short working time, insufficient strength, segregation shrinkage, etc.
Chinese patents 200410023087.0 and 200410023086.6 disclose a kind of emulsified asphalt and asphalt cement mortar, but there are still defects in stability, cost, etc.
Chinese patent 200610113251.6 discloses a special emulsified asphalt for railway or light rail slab-type ballastless track. It needs hydrochloric acid to adjust the pH value, which is easy to cause corrosion to storage and transportation equipment such as iron drums, storage tanks, and tank cars. At the same time, it also needs to add a thickener. And inorganic salt as stabilizer, the preparation process is complicated
[0003] In short, the emulsified asphalt used to prepare emulsified asphalt cement CA mortar mainly has poor stability, high ionic strength, and poor compatibility with cement systems, so that the prepared emulsified asphalt cement CA mortar has a short working time and a narrow temperature range. , easy shrinkage and delamination, poor filling performance, etc., especially in terms of stability and early strength, it did not meet the technical conditions of emulsified asphalt cement CA mortar for ballastless tracks stipulated by the Ministry of Railways
Although there are similar products in foreign countries, there are problems such as high prices, limited sources of raw materials, and complicated production processes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of emulsified asphalt, its formula composition is shown in Table 2. Wherein the asphalt is No. 90 heavy traffic road asphalt (penetration is 60, unit is 1 / 10mm); ionic surfactant is cationic surfactant coconut oil amine and 1-aminoethyl-2-heptadecyl imidazole Phenyl-2 hydrochloride; non-ionic surfactants are coconut acid diethanolamide and nonylphenol polyoxyethylene ether; auxiliary agents are polyvinyl alcohol and hydroxyethyl cellulose. The preparation steps are as follows: heat the asphalt in the proportion to about 150°C, dissolve the additives polyvinyl alcohol and hydroxyethyl cellulose in boiling water, cool to about 60°C, and then dissolve other ingredients in polyvinyl alcohol and hydroxyethyl cellulose In the cellulose aqueous solution, a mixed aqueous solution is formed, and finally the heated asphalt and the mixed aqueous solution are passed through emulsification equipment to obtain the emulsified asphalt product in the present invention. The perfo...

Embodiment 2

[0040] A kind of emulsified asphalt, its formula composition is shown in Table 2. Wherein pitch is No. 100 straight-run pitch (penetration is 105, unit is 1 / 10mm); Ionic surfactant is cationic surfactant 1-aminoethyl-2-heptadecylimidazoline-2 hydrochloric acid salt; the nonionic surfactant is polyoxyethylene sorbitan monooleate (T-80 for short); the auxiliary agent is cationic guar gum. The preparation steps are as follows: heating the bitumen in the proportioning ratio to about 110°C, dissolving the auxiliary cationic guar gum in water at about 40°C, then dissolving other components in the cationic guar gum aqueous solution to form a mixed aqueous solution, and finally The emulsified asphalt product in the present invention is obtained by passing the heated asphalt and the mixed aqueous solution through emulsification equipment. The performance test of the product obtained is carried out according to the requirements of Table 1, and its test results are shown in Table 3.

Embodiment 3

[0042] A kind of emulsified asphalt, its formula composition is shown in Table 2. Among them, the asphalt is Daqing No. 75 asphalt (the penetration is 76, and the unit is 1 / 10mm); the ionic surfactant is cationic surfactant hydrogenated tallow propylene diamine; the nonionic surfactant is nonylphenol polyoxygen Vinyl ether and fatty alcohol polyoxyethylene ether; auxiliary agent is hydroxyethyl cellulose. The preparation steps are as follows: heating the asphalt in the proportion to 160-180°C, dissolving the additive hydroxyethyl cellulose in water at about 30°C, and then dissolving other ingredients in the aqueous hydroxyethyl cellulose solution to form a mixed aqueous solution. Finally, the heated asphalt and the mixed aqueous solution are passed through emulsification equipment to obtain the emulsified asphalt product in the present invention. The performance test of the product obtained is carried out according to the requirements of Table 1, and its test results are show...

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Abstract

The present invention provides emulsified asphalt made of asphalt, surfactant, additive and water. Wherein, the contents of each component are: 38 percent to 58 percent of asphalt, 1 percent to 15 percent of ionic surfactant and 2.5 to 19 percent of non-ionic surfactant of the surfactant, 0.5 to 8 percent of additive; and the left is water; all are calculated according to a weight percentage. The product of the present invention is the emulsified asphalt of good stability and simple production process. In the actual use, the CA mortar can avoid eduction and contraction; thus the CA mortar has appropriate work time and high strength in the early period, which can fully meet the requirements of plate type ballastless track. Therefore, the product of the present invention can be effectively used in emulsified asphalt cement mortar (also known as CA mortar) for plate type ballastless track of high-speed railway or urban light rail.

Description

technical field [0001] The invention relates to an emulsified asphalt, in particular to an emulsified asphalt mainly used in emulsified asphalt cement mortar (also known as CA mortar) for high-speed railway slab ballastless track or urban light rail. Background technique [0002] At present, my country is implementing a large-scale high-speed railway plan. It is reported that the Ministry of Railways announced that 20,000 kilometers of high-speed dedicated railways will be built in the next five years. In the construction of high-speed railways, the roadbed will use a large number of "ballastless track" technology. The new "ballastless track" is similar to a "cement road" and will no longer have a gravel roadbed. Compared with ordinary railways, ballastless tracks have the advantages of no splash damage, high stability, less maintenance and long service life. The ballastless track technology is the most mature in Europe and Japan. It is characterized by laying a concrete b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08J3/03
Inventor 张洪武
Owner 张洪武
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