Concrete salt corrosion inhibitor

Abstract

The invention relates to the field of concrete durability, and discloses a concrete salt corrosion inhibitor. The concrete salt corrosion inhibitor consists of the following components: silicon rich mineral powder and activated barite powder. When the concrete salt corrosion inhibitor is added into concrete, the concrete has the new characteristic of salt corrosion inhibition, the problem of salt corrosion diseases caused by concrete sulfate and the like is radically solved, the service life of the concrete is prolonged, the investment benefit is promoted, the resources are saved, and the concrete salt corrosion inhibitor accords with the scientific development idea.

Description

technical field [0001] The invention relates to the field of concrete durability, in particular to a concrete anti-salt corrosion agent. Background technique [0002] Concrete is an indispensable and important material in today's construction projects. As more and more engineering structures are retained by the society, the amount of maintenance and renovation works is as huge as the amount of new construction. In the foreseeable future, concrete will be a long-lasting and prosperous industry. In recent years, concrete sulphate erosion has become more frequent and spreading throughout the country. Concrete structures have suffered greatly from acid rain in the western and coastal saline-alkali areas and in many coal-burning urban acid rain areas, but the control measures are often Unsatisfactory. [0003] The service life and durability of concrete has always been the focus of engineering circles in various countries, especially in recent years, a large number of residenti...

AI Technical Summary

Problems solved by technology

However, there are still few fundamental breakthroughs in engineering practice for the control of concrete sulfate erosion diseases. For example, sulfate-resistant cement has been used for decades at home and abroad. The Chinese National Standard (GB748) of its products stipulates a corrosion resistance coefficient of K value) reaches 80% and is qualified (retrieve the former Soviet Union and European American standards, generally also this level), that is to say, with the above-mentioned concrete engineering structures of sulfate-resistant cement, under the erosion of seawater or saline-alkali waters soil , and only alleviated rather than eradicated the corrosion of concrete caused by saline-alkali. (K value) reaches 85%, which is qualified, but still fails to achieve a radical effect, and its mixing amount is also relatively high (12-15% of cement content), and its cost after mixing is about 30% higher than that of ordinary concrete. above

After the sulfate-resistant cement replaces ordinary cement, its cost is 30-40% higher than that of ordinary concrete, which is unacceptable for the high cost of the project.