Emulsification asphalt used for high speed railway or light rail plate type slag-free orbit CA mortar

Abstract

The invention requires to protect an emulsified asphalt specially used for high-speed railway or light rail plate ballastless track CA sand pulp. The composition is as follows by weight: asphalt 38-55%, cationic surface active agent 3-20%, non-ion surface active agent 5-20%, assistant agents 2.0-8.0%, residual water. The emulsified asphalt can effectively avoid CA sand pulp isolation and give a proper working period of the sand pulp, more than 1 hour and leave an adequate time for practical construction. The CA sand pulp produced by such emulsified asphalt has a high early strength of 1.5-2.0MPa which is easy to control the air content, fluidity, early strength, material separation degree of the CA sand pulp. The emulsified asphalt has a good storage stability which can be stored for at least 6 months at 0-40 DEG C without layered isolation, and is easy to transport and store and will not erode the steel equipments and reinforcing steel bar in the concrete.

Description

technical field [0001] The invention relates to emulsified asphalt, which is mainly used in CA mortar of high-speed railway slab ballastless track, and can also be used in urban light rail. technical background [0002] 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. The subgrade of the high-speed special railway will adopt the "ballastless track" technology. There are gravel subgrades under the existing railway subgrade. The new "ballastless track" is similar to the "cement road" and there will be no gravel subgrade. 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 base o...

AI Technical Summary

Problems solved by technology

If there is a kind of ballastless track emulsified asphalt cement mortar, the actual application effect is still unsatisfactory if the trial paving is carried out on the Qinshen Passenger Dedicated Line

Another disclosed emulsified asphalt and asphalt cement mortar still needs to be improved in aspects such as cost and stability

There is also a kind of emulsified asphalt specially used for railway or light rail slab ballastless track. The proportion of emulsifier is relatively small, and the applicant can't meet the use requirements through the test under its technical scheme; at the same time, it needs hydrochloric acid to adjust the pH value, which is easy to use. Storage and transportation equipment such as iron barrels, storage tanks, and tank trucks cause corrosion, and thickeners need to be added, and the preparation process is complicated

[0003] In short, the existing emulsified asphalt for preparing emulsified asphalt cement CA mortar mainly has poor stability, high ionic strength, and poor compatibility with the cement system, so that the prepared emulsified asphalt cement CA mortar has a short working time and a narrow temperature range. , easy delamination, poor filling and other deficiencies, 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.

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