Ultra-high performance concrete sleeper

Abstract

The invention relates to the field of sleepers, and particularly discloses an ultra-high performance concrete sleeper. The sleeper comprises a sleeper body, the sleeper body is formed by pouring ultra-high-performance concrete, reinforcing steel bars are arranged in the sleeper body, and the ultra-high-performance concrete is formed by mixing, by weight, 27-38 parts of cement, 6-8 parts of powder, 3-5 parts of silica fume, 40-50 parts of fine sand, 3-5 parts of steel fibers, 3-5 parts of organic fibers, 8.5-12 parts of additives and 5-8 parts of water. Organic fibers are adopted to replace part of steel fibers to produce ultra-high performance concrete. Due to the flexibility of the organic fibers, the elasticity and toughness of the sleeper can be improved, the crack resistance can be obviously improved, and cracks are reduced. Meanwhile, the source is wide, the cost is low, so that the cost of the ultra-high performance concrete can be obviously reduced, the weight of the sleeper is reduced, the construction difficulty and cost are reduced, the slagging of a ballast bed and the sinking of the sleeper are reduced, the service life is prolonged, and the cost is reduced.

Description

technical field [0001] The present application relates to the field of sleepers, more specifically, it relates to an ultra-high performance concrete sleeper. Background technique [0002] Sleepers were originally made of wood, which has good elasticity and insulation, and is less affected by temperature changes in the surrounding medium. Due to the shortage of timber resources in the world, reinforced concrete sleepers are gradually used, and then improved to prestressed concrete sleepers. The sleeper not only supports the rail, but also maintains the position of the rail, and also transmits the huge pressure transmitted by the rail to the track bed. Therefore, high mechanical properties such as impact resistance, crack resistance, and tensile resistance are required. [0003] Compared with ordinary concrete, ultra-high performance concrete (UHPC) exhibits two "ultra-high", that is, ultra-high durability and ultra-high mechanical properties. Ultra-high-performance concret...

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventors found that the sleeper casted by ultra-high performance concrete has many advantages, but it also has the problem that the density of steel fibers is too large, it is easy to agglomerate when stirred, and it tends to sink in the lower part of the concrete when it is vibrated and poured, and the distribution is not good. Disadvantages of uniformity and not easy to pump