Cement concrete air entraining agent and method for preparing same

Abstract

The invention discloses a cement concrete air-entraining agent, which is made from commercial primary, secondary or three-level ordinary rosin powder, commercial industrial-level sodium hydroxide, potassium permanganate, hydrogen peroxide, sulfuric acid and tap water through heated-stirring reaction at 60-90 DEG C; wherein, the weight proportions of the raw materials are as follows: 5-30 weight portions of rosin, 1-20 weight portions of sodium hydroxide solution, 0-20 weight portions of potassium permanganate solution, 0-20 weight portions of hydrogen peroxide solution, 0-20 weight portions of sulfuric acid solution, and 60-90 weight portions of tap water solution. The air-entraining agent disclosed in the invention can be stably preserved for a long time without rosin precipitation; the bubbles caused by the air-entraining agent are exquisite and have good stability, which can be used in cement mortar or concrete and other building materials.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to cement mortar, concrete air-entraining agent and production technology thereof. Background technique [0002] In the field of building materials, air-entraining agents need to be added during the mixing process of cement mortar and concrete. Rosin soap is the most commonly used cement mortar and concrete air-entraining agent at home and abroad. It has a long application history and stable performance. The concrete mixed with it has excellent durability. [0003] Excellent rosin soap is made of natural oxidized rosin, which is directly saponified with sodium hydroxide solution when heated to 70°C to 80°C. Due to the scarcity of natural oxidized rosin, the rosin soap air-entraining agents currently produced are all made of primary, secondary or tertiary rosin, which are obtained by thermal polymerization with sulfuric acid, phenol, carbolic acid, etc., and the storage...

AI Technical Summary

Problems solved by technology

Due to the scarcity of natural oxidized rosin, the rosin soap air-entraining agents currently produced are all made of primary, secondary or tertiary rosin, which are obtained by thermal polymerization with sulfuric acid, phenol, carbolic acid, etc., and the storage stability of liquid products is poor, and rosin is very It is easy to reduce and precipitate, which affects product quality; in order to facilitate storage, it is generally made into a paste, which has poor solubility, poor air-entraining and foam-stabilizing effects, and poor compounding with cement mortar and other admixtures in concrete

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