콘크리트의 발포제

콘크리트 혼화제 중에서, 발포제는 주로 발포 콘크리트를 생산하는 데 사용됩니다.. 이러한 물질은 다양한 물질에서 파생될 수 있습니다.. 이들 중 일부에는 알킬 황산염이 포함됩니다., amine oxides and polygylcol sulphates. These are added to the concrete in the form of liquids or powders.

The most common concrete plasticizers contain naphtha-lene sulphonates and melamine sulphonates. They are usually added in quantities ranging from 0.2 에게 0.5 % by mass. This is sufficient to increase the slump of the concrete without affecting its water content. 하지만, the amount of these admixtures in a concrete mixture is very low, so they are not allowed to be discharged directly into the sewer system.

These admixtures are not deemed a hazard for humans, as they are biodegradable. They also are non-irritating. The concrete admixtures are classified as safe in accordance with the German Committee on Reinforced Concrete (DAfStb).

The evaluation of the products is governed by REACH, a European legislation that governs the registration, authorisation and assessment of chemicals. The goal is to ensure a high level of protection of human health and the environment.

The majority of concrete admixtures are based on higher condensed compounds. These are mainly composed of salts of higher fatty acids. During the leaching process of these substances, the monomer compounds are essentially removed from the concrete.

A few of the most important representative concrete admixtures are citric acid, lactic acid, malic acid, tartaric acid and gluconic acid. These are generally recognised as safe, though they have some acute toxicity.