Concrete applicable to production of bridge expansion joints in municipal engineering

Abstract

The invention belongs to the technical field of bridges in the municipal engineering and discloses concrete applicable to production of bridge expansion joints in municipal engineering. The concrete is prepared from raw materials in parts by weight as follows: 320-360 parts of cement, 40-80 parts of fly ash, 100-300 parts of modified rubber particles, 10-50 parts of hollow microspheres, 0.01-0.1 parts of a tackifier, 0.01-0.05 parts of polyethylene glycol distearate, 1-5 parts of complex fiber, 1-4 parts of a polycarboxylate superplasticizer, 300-500 parts of sand, 800-1,200 parts of pebble and 150-180 parts of water. The concrete applicable to bridge expansion joints in municipal engineering has certain elasticity and roughness and can greatly reduce effects of impact force, heat expansion and cold contraction and other factors on bridges during operation of the bridges.

Description

Technical field [0001] The invention belongs to the technical field of municipal engineering bridges, and specifically relates to a concrete suitable for making bridge expansion joints in municipal engineering. Background technique [0002] With the rapid development of infrastructure, a large number of bridges have emerged in the construction of urban roads. Expansion joints are an important component of bridge engineering. The construction quality of expansion joints is directly related to the operation and use of bridges. The traditional expansion joints are reinforced concrete, and later gradually developed into steel fiber concrete. Currently, the reinforced concrete and steel fiber concrete used in municipal bridge projects generally have poor compression resistance. During the operation of the bridge, due to structural thermal expansion and contraction Factors such as beam displacement and expansion joints are all cracks of varying degrees, which seriously affect the durab...

AI Technical Summary

Problems solved by technology

The traditional expansion joint is reinforced concrete, which was gradually developed into steel fiber concrete. At present, the reinforced concrete and steel fiber concrete used in municipal bridge projects generally have poor extrusion resistance. During the operation of the bridge, due to thermal expansion and contraction of the structure and beam displacement and other factors, the expansion joints all have different degrees of cracks, which seriously affect the durability of the bridge.