Concrete air-entraining agent

Abstract

The invention discloses a concrete air-entraining agent, comprising the following components in parts by weight: 56-70 parts of camellia saponin water aqua, 8-22 parts of sodium dodecyl benzene sulfonate and 10-23 parts of lignin calcium carbonate water reducer calcium lignosulphonate. According to the concrete air-entraining agent disclosed by the invention, through compounding of the camellia saponin water aqua, the sodium dodecyl benzene sulfonate and the lignin calcium carbonate water reducer calcium lignosulphonate, a good effect is obtained; the concrete air-entraining agent is high in gas production rate, and small in mixing amount; introduced bubbles are not communicated, and are small in interval and aperture; and the durability, the permeability resistance, the freezing resistance and the erosion resistance of concrete can be improved, and the working performance, such as easiness in mixing, of the concrete can be improved.

Description

technical field [0001] The invention relates to a concrete air-entraining agent. Background technique [0002] Air-entraining agent refers to an admixture that introduces many tiny independently distributed air bubbles during the mixing process of concrete to improve the workability of concrete and improve the durability of freeze-thaw resistance. High-quality air-entraining agent can also improve the impermeability of concrete and help reduce the harmful expansion of alkali-aggregate reaction; and it can be used in combination with water reducing agent and other types of admixtures to further improve the performance of concrete. The use of air-entraining agents is an important discovery in the history of concrete development, because it prolongs the service life of concrete and increases its durability. The use of air-entraining agents dates back to the 1930s, when many concrete roads were built to develop North America. Anti-icing salt is sprinkled on roads in cold wea...

AI Technical Summary

Problems solved by technology

Although my country has produced and applied air-entraining agents for decades, many construction and design units still have misunderstandings about air-entraining agents, and the performance of many air-entraining agents still has a certain gap compared with similar foreign products. There are few varieties of air-entraining agents produced, and we have not done much research on the application technology of air-entraining agents. The common concrete air-entraining agents currently on the market in my country mainly include rosin soap and rosin thermal polymers, lauryl sulfates, and triterpene saponins. class etc.

Due to the poor solubility of rosin products, the poor bubble structure and foam stability, the compounding performance of lauryl sulfate and triterpene saponins with other additives is poor, especially the above three types of products are all compatible with the new generation of high-efficiency Water reducer——Polycarboxylate water reducer is difficult to be compatible and other reasons, engineering promotion and application are limited