Preparation method of high-performance anti-corrosion repairing mortar

Abstract

A preparation method of high-performance anti-corrosion repairing mortar including following components, by weight: 150-250 parts of cement, 280-725 parts of quartz sand, 50-200 parts of mineral powder, 50-150 parts of fly ash, 0-50 parts of silicon ash, 5-10 parts of barium nitrate, 0.1-1 part of an early strength agent, 1-4 parts of PP fibers, 0.5-20 parts of latex powder, 0.5-5 parts of cellulose ether, 0.5-2 parts of a water repellent agent, 0.001-0.1 parts of an air entraining agent, 0.1-2 parts of a water reducing agent, 0-1 part of a defoaming agent, and 100-250 parts of water. The invention, aiming to the characteristic of sulphate attack and the performance requirement of repairing mortar, discloses the repairing mortar which can repair the surface of damaged concrete with a protective film formed thereon to prevent the concrete form being corroded again. The repairing mortar is good in construction performance, can be used for coating the surface of the damaged concrete or filling damaged positions of the concrete. The repairing mortar is high in bonding strength and strength, is good in anti-permeability and flexibility, is simple in preparation process, is especially suitable for repairing the concrete subjected to sulphate attack, is great in market prospect and is good in practicability.

Description

technical field [0001] The invention relates to a preparation method of high-performance anti-corrosion repair mortar, which belongs to the field of building material design. Background technique [0002] Since the advent of Portland cement in the 1920s, concrete has become an indispensable material in civil engineering due to its practicality and low cost, and is widely used in bridges, dams, highways, industrial and civil building structures . According to incomplete statistics, the amount of concrete consumed in the world today is not less than 4.5 billion cubic meters per year, and the annual consumption is constantly increasing with the advancement of urbanization. [0003] During the use of concrete, it is subjected to external physical and chemical effects, and the service life is mostly less than the designed service life. my country has a vast sea area, and the coastline stretches for thousands of kilometers. The coastal areas are often economically developed areas...

AI Technical Summary

Problems solved by technology

[0008] A large amount of existing concrete is corroded by sulfate, and the amount of concrete to be repaired is far greater than the quantity of construction; in the prior art, there is no repair mortar for sulfate corrosion damage, and ordinary mortar is used for repair after sulfate corrosion It is often hollowed out and peeled off shortly after repairing, causing a lot of manpower and material loss