Structural Classification Of Building Additives
Nov 02, 2024
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The structural classification of building additives mainly includes the following categories:
Classification by ingredients:
Inorganic admixtures: including various inorganic salts, some metal elements and a small amount of hydroxides, such as CaCl2 and Na2SO4 in early strength agents, aluminum hydroxide in waterproofing agents, etc.
Organic admixtures: This type of admixture accounts for the vast majority of concrete admixtures and mainly belongs to the category of surfactants, including anionic, cationic, nonionic and polymeric surfactants, such as water reducing agents. Lignosulfonates, lignosulfonic acid formaldehyde condensates, etc.
Composite admixtures: Admixtures made of appropriate inorganic and organic compounds, usually have multiple functions or significantly improve a certain performance.
Classification by function:
Admixtures that improve the flow properties of concrete mixtures: including various water reducing agents, air entraining agents, pumping agents, etc..
Admixtures that adjust the setting time and hardening properties of concrete: including retarder, early strength agent, accelerator, etc..
Admixtures to improve the durability of concrete: including air-entraining agents, waterproofing agents and rust inhibitors.
Admixtures that improve other properties of concrete: including air-entraining agents, expansion agents, antifreezes, colorants, etc.
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