Manufacturing method of porous volcanic aggregate concrete sleeper

Abstract

The invention discloses a manufacturing method of a porous volcanic aggregate concrete sleeper, and belongs to the technical field of sleeper production. The manufacturing method comprises the steps of concrete raw material preparation, porous volcanic aggregate pre-treatment preparation, porous volcanic aggregate concrete preparation, pre-stressed wire frame binding, steel mould placement and tensioning, porous volcanic aggregate concrete pouring and vibration compaction forming, adoption of automatic temperature-controlled steam curing, releasing and demoulding. According to the manufacturing method of the porous volcanic aggregate concrete sleeper, disclosed by the invention, by reasonably blending the proportion of porous volcanic aggregate concrete and regulating technological parameters in a construction process, the porous volcanic aggregate concrete sleeper which can be used for the tropical zone, is light in mass and high in strength is prepared.

Description

technical field [0001] The invention relates to a concrete sleeper, in particular to a method for manufacturing a porous volcanic rock aggregate concrete sleeper, and belongs to the technical field of sleeper production. Background technique [0002] At present, most of the widely used railway sleepers are prestressed concrete sleepers. The main raw materials are cement, river sand, gravel, and water. By adding admixtures and admixtures reasonably, prestressed concrete sleepers with different properties have been developed. It has high durability and high compressive strength. [0003] At present, the main technological process of domestic production of prestressed concrete bridge sleepers is: prestressed steel wire tensioning-concrete batching, mixing, pouring-vibration-curing, in which steel wire tensioning, concrete batching, mixing, pouring and other processes occupy crucial position. At the same time, the raw materials used are also slightly different based on the dif...

AI Technical Summary

Problems solved by technology

When it is located in the tropics, it has a unique crushed stone, that is, porous volcanic rock. The surface of the local volcanic rock is not smooth but has a porous structure, so it is called porous volcanic rock. This porous volcanic rock is easy to produce air bubbles in concrete, making the concrete appear For the honeycomb structure, if the proportion of concrete is not strictly controlled during the preparation process and the technological factors in the construction process, the amount of air bubbles in the concrete sleeper will be too large, which will affect the appearance of the concrete sleeper on the one hand, and on the other hand, will inevitably affect the structure of the concrete sleeper to a certain extent. It will reduce the compressive strength and durability of concrete sleepers. The voids and air bubbles formed inside the concrete and on the surface of the concrete will form stress concentration areas during subsequent use, and deep cracks may appear, which will seriously reduce the strength of the concrete.