Addition combination agent of rapid powder repairing material and application of addition combination agent in cement concrete

Abstract

The invention discloses an addition combination agent of a rapid powder repairing material and application of the addition combination agent in cement concrete. The addition combination agent is prepared from 260-300 parts of aluminum sulfate, 30-40 parts of ferric sulfate, 15-20 parts of lithium sulfate, 15-20 parts of magnesium oxide, 20-30 parts of magnesium fluosilicate and 80-150 parts of modified nano silicon dioxide. The materials are placed in a ball milling tank, the ball-to-material ratio is (20-30): 1, ball milling is conducted for 1-2 h at 300-500 rpm under the protection of argon, the particle size of ground powder is 200-300 meshes, and the additive combination agent of the rapid powder repairing material is obtained; the method comprises the following steps: mixing the additive combination agent of the powder rapid repairing material with water and diethanol amine according to a mass ratio of (400-600): (200-300): (20-30), and then mixing the mixture with cement according to a mass ratio of (6-8): 100. According to the invention, aluminum sulfate is taken as a main component and is combined with other components, and a nano silicon dioxide material with a huge specific surface area can provide crystallization nucleation points for hydration products of cement, has an effect of promoting early hydration, can fill nano-scale pores of a cement material, improves the compactness of an internal structure and meets the requirements of strength and durability of the cement.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a combination agent for powder quick repair material and its application in cement concrete. Background technique [0002] With the development of our country's economy, infrastructure construction is becoming more and more perfect, and facilities such as tunnels, bridges, and highways are also being built continuously, which provides convenience for people and power for the economy. In all kinds of infrastructure construction, due to unreasonable concrete structure design, construction defects, environmental erosion, improper maintenance and other reasons, a large part is in urgent need of reinforcement and repair. Therefore, the research and development of cement concrete repair materials is necessary. [0003] Traditional cement concrete repair materials can be divided into inorganic and organic types, among which inorganic repair materials are widely u...

AI Technical Summary

Problems solved by technology

However, its large shrinkage rate, especially in dry and hot environments, has an adverse effect on compatibility and indirectly reduces the impermeability of the entire repair system

In addition, the maintenance period of ordinary Portland cement repair mortar is also longer, which prolongs the repair period and is not suitable for emergency repair projects.