Self-repairing anti-shrink cement based composite material

Abstract

The invention discloses a self-repairing anti-shrink cement based composite material which comprises the following components in parts by weight: 400-800 parts of cement, 200-600 parts of waste, 400-1000 parts of sand, 264-528 parts of water, 10-70 parts of fiber, 4-10 parts of additive and polymer emulsion which accounts for 5%-10% of the gross weight of the cement. The self-repairing anti-shrink cement based composite material has good anti-shrink performance, impermeability and durability. When having a crack, the material can realize a self-repairing function under field conditions, and can be used as restorative materials for retaining walls, road mat coats, concrete pipelines, oil and gas pipelines, dams and the like.

Description

technical field

[0001] The invention relates to a repairing material, in particular to a self-repairing anti-shrinkage cement-based composite material. Background technique

[0002] Concrete is widely used in construction facilities due to its good performance and low price. However, long-term use and weathering will cause concrete cracking, the crack width is large, and harmful substances (chloride ions, sulfate ions, etc.) can quickly invade, and it is more susceptible to erosion in coastal areas, which seriously affects the safety and long-term durability of concrete structures. sex. Experiments have proved that ordinary mortar is not effective as a repair material, and its bonding force with concrete is poor. After a period of repair, cracking and other phenomena will occur. Fiber-reinforced cement-based composites are used as repair materials. Although the material performance is enhanced and the cohesion is improved, the reduction in aggregate particle size will caus...