Hazardous chemicals refer to highly toxic chemicals and other chemicals that are toxic, corrosive, explosive, flammable, and combustion-supporting, and are harmful to the human body, facilities, and the environment.
Concrete high-efficiency water-reducing agents are mainly naphthalene series, melamine series and their compound water-reducing agents. Among them, naphthalene series is the main one, accounting for 67 %. Naphthalene series, melamine series, etc. are not classified as hazardous chemicals. Therefore, concrete superplasticizer does not fall into the category of hazardous chemicals.
Admixtures that can significantly reduce the amount of mixing water under the condition that the concrete slump is basically the same are called high-efficiency water-reducing admixtures.
The water reduction rate of high-efficiency water-reducing agent can reach more than 20%. Mainly naphthalene series, melamine series and water-reducing agents compounded from them, of which naphthalene series is the main one, accounting for 67%. Especially in my country, most of the high-efficiency water-reducing agents are naphthalene-based high-efficiency water-reducing agents with naphthalene as the main raw material. Naphthalene series superplasticizers can be divided into high-concentration products (Na2SO4 content 10%). Most naphthalene-based high-efficiency superplasticizer synthesis plants have the ability to control the Na2SO4 content below 3%, and some advanced companies can even control it below 0.4%.
Scope of application
Applicable to all types of industrial and civil buildings, water conservancy, transportation, ports Prefabricated and cast-in-situ reinforced concrete in municipal and municipal engineering projects.
Suitable for high-strength, ultra-high-strength and medium-strength concrete, as well as concrete requiring early strength, moderate frost resistance and large fluidity.
Precast concrete components suitable for steam curing process.
Suitable for making water-reducing enhancement components (i.e. masterbatch) of various composite admixtures.
Does not belong. Hazardous chemicals are flammable and explosive materials. Generally, high-efficiency concrete superplasticizers do not contain flammable or explosive ingredients, so concrete superplasticizers are not considered hazardous chemicals. </p
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