Conductive quick-hardening repair material and preparation method thereof

Abstract

The invention discloses a conductive quick-hardening repair material, and the material comprises the following components in parts by weight: 400-600 parts of a cementing material, 600-700 parts of quartz sand, 50-100 parts of silicon powder, 50-100 parts of fly ash, 60-100 parts of gypsum, 120-160 parts of water, 10-20 parts of a water reducing agent, 5-10 parts of an expanding agent, 8-15 parts of a composite early-strength accelerator and 30-45 parts of a high-viscosity conductive phase. The conductive quick-hardening repair material obtained by the invention has good environmental stability, expansibility and conductivity, and can show relatively high mechanical properties after being demolded for 2-3 hours; maintenance personnel can judge the damage degree and the replacement opportunity more visually according to the strength of the electric signals, the working efficiency and the safety coefficient are remarkably improved, the sustainable development requirements of bridge construction and maintenance can be met, and important economic and environmental benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a conductive fast-hardening 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 and 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. has been widely used. However, due to the influence of factors such as concrete bonding and hardening chara...

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