High-performance concrete material for prestressed component of ballastless track and method for preparing same

Abstract

The invention relates to a high performance concrete material used in prestressed components of non-ballasted tracks and a preparation method thereof. The gel material is cement, the aggregate is sand and stone, the admixture is complex mineral powder, and then high efficiency water reducing agent and water are added, stirred and vibrated, thus preparing the material. The components of the complex admixture are aluminosilicate, carbonate and sulfate, and the relative weight ratios are as follows: 15 to 80 percent of the aluminosilicate, 15 to 80 percent of the carbonate and 5 to 20 percent of the sulfate, and the total weight is 2 to 6 percent of the total weight of the concrete component. The material can ensure that the early strength of the concrete can achieve the required technical indexes of the prestressed concrete component used in non-ballasted tracks, thus obviously increasing the comprehensive properties, the workability and the durability of the concrete component. By using ordinary portland cement instead of superfine cement with deficient material source and exorbitant price, the product quality in mass production can be increased and the problem of high production cost of the prestressed concrete preformed component used in non-ballasted tracks can be solved.

Description

technical field [0001] The invention relates to a high-performance concrete material and a preparation method thereof, in particular to a high-performance concrete material and a preparation method thereof for manufacturing high-speed railway ballastless track prestressed components. Background technique [0002] With the development of modern transportation construction technology, the manufacture of high-speed railway ballastless track prestressed components requires the use of high-performance concrete materials. In order to make concrete obtain higher early strength quickly, thereby shortening the demoulding time and production cycle, and improving production efficiency, the current international standard requires high-performance concrete materials for the production of prefabricated sleepers and prefabricated track slabs to use a specific surface area of ​​500~ 600m 2 / kg of superfine cement. However, ultra-fine cement is an unconventional product in my country, whic...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a high-performance concrete material for ballastless track prestressed components and its preparation method, to solve the technical problem of preparing high-performance concrete materials with ordinary cement instead of ultra-fine cement; The mechanical properties of the material and the durability of the components meet the technical requirements of the high-performance concrete material pillow without greatly increasing the cost

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