A kind of conductive fast-hardening type repair material and preparation method thereof

Abstract

The invention discloses a conductive and fast-hardening type repair material. The components and their parts by weight include: 400-600 parts of cementitious material, 600-700 parts of quartz sand, 50-100 parts of silicon powder, and fly ash. 50-100 parts, gypsum 60-100 parts, water 120-160 parts, water reducing agent 10-20 parts, expansion agent 5-10 parts, composite early strength accelerator 8-15 parts, high viscosity conductive phase 30-45 parts share. The conductive and fast-hardening type repair material obtained by the invention has good environmental stability, expansion and conductivity, and can show high mechanical properties after demolding for 2-3 hours; maintenance personnel can more intuitively judge damage through the strength of electrical signals degree and replacement timing, significantly improve work efficiency and safety factor, can meet the sustainable development requirements of bridge construction and maintenance, and have important economic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a conductive and fast-hardening type repair material and a preparation method thereof. Background technique [0002] my country's bridge construction has entered a stage of rapid development in the 21st century. In recent years, with the rapid development of the national economy, people's demand for life travel continues to increase. The construction of bridges extending in all directions promotes the development of the city, further improves people's driving conditions, and enhances the connection between various areas of the city. At present, my country's bridge construction technology has leapt to the forefront of the world. As an important bulk building material, cement concrete plays an irreplaceable role in my country's infrastructure construction. With its excellent properties such as high stiffness, strong bearing capacity and low cost, it is widel...

AI Technical Summary

Problems solved by technology

Inorganic repair materials mainly use materials such as graphite, carbon fiber, and steel slag as the conductive phase. When graphite is used as the conductive phase of traditional conductive materials, it is usually added in one time. Due to uneven dispersion, it requires a large amount of dosage to perform. Carbon fibers have high cost and are also difficult to disperse, which affects the conductivity of conductive materials; at the same time, the ettringite generated by cementitious materials will further affect the improvement of early strength and conductivity; steel slag has very fine requirements for fineness. High energy consumption is required for grinding, resulting in high cost; organic repair materials also have the disadvantages of unstable conductivity and difficult control; most polymer modified repair materials have poor water solubility, poor environmental stability and Disadvantages of difficult to control conduction