Low chloride ion permeability concrete

Abstract

The invention relates to low chloride ion permeability concrete and belongs to the field of building materials. According to the low chloride ion permeability concrete provided by the invention, the concrete is prepared from a concrete matrix material and an auxiliary agent, wherein the concrete matrix material is prepared from the following components: a solid component is prepared from 20 to 30percent of Portland cement, 25 to 40 percent of fly ash, 10 to 25 percent of aluminous clinker and 5 to 10 percent of alumina ceramic microsphere, wherein the water-cement ratio is 0.5 to 0.65; the auxiliary agent is prepared from the following components in percentage by mass: 30 to 50 percent of nano kaolin particles, 2 to 10 percent of nanometer magnesia particles, 5 to 15 percent of nano calcite particles, 25 to 40 percent of nano montmorillonite particles and 2 to 5 percent of PVA fibers. The chloride ion permeability of the low chloride ion permeability concrete is decreased by 30 percent or above than that of ordinary concrete.

Description

technical field [0001] The invention relates to a concrete with low chloride ion permeability, which belongs to the field of building materials. Background technique [0002] At present, the concrete plants that lay roads and some buildings are corroded by chloride ions, resulting in damage to the steel bars in the concrete or damage to motor vehicles on the road and the road itself. For example, in winter in the north, the deicing agent used for road snow removal contains a large amount of chloride ions, and a large amount of deicing agent will cause damage to the road itself, and at the same time, it will also corrode the motor vehicles running on the road. In addition, for reinforced concrete buildings such as ports, bridges, and reinforced concrete pipes that enter and exit seawater, after a large amount of chloride ions penetrate into the concrete, they will corrode the steel bars, resulting in damage to the buildings, and in severe cases, destroy the safety of the buil...

AI Technical Summary

Problems solved by technology

[0002] At present, the concrete plants that lay roads and some buildings are corroded by chloride ions, resulting in damage to the steel bars in the concrete or damage to motor vehicles on the road and the road itself.

For example, in winter in the north, the deicing agent used for road snow removal contains a large amount of chloride ions, and the use of a large amount of deicing agent will cause damage to the road itself, and at the same time, it will also have a corrosive effect on motor vehicles driving on the road.

In addition, for reinforced concrete buildings such as ports, bridges, and reinforced concrete pipes that enter and exit seawater, after a large amount of chloride ions penetrate into the concrete, they will corrode the steel bars, resulting in damage to the buildings, and in severe cases, destroy the safety of the buildings and reduce their safety. service life