Agent réducteur d'eau

L'agent réducteur d'eau est un adjuvant qui peut aider à réduire la consommation d'eau et également à améliorer la durabilité et la fonctionnalité du béton.. The first agent réducteur d'eau was used in the United Kingdom in the 1930s. Other countries like Japan and the United States have developed the technology of using this admixture.

Typiquement, water reducing admixtures fall into three categories: faible, moyen, et haut. Low range reduces the amount of mixing water by more than twelve percent; medium range reduces it by more than fifty percent; and high range increases it by more than ten percent.

Lignosulfonates were the first class of agent réducteur d'eaus. They are a mixture of a polymer electrolyte and a water-soluble multifunctional substance. These two compounds have the property of dispersing dirt and calcium phosphate, and they can also disperse biological slime and zinc ions. In addition to being used as a agent réducteur d'eau, these substances are also commonly used as waterproofing agents.

Water reducing agents are usually made of an anionic surfactant. It has two parts: a hydrophilic group and a hydrophobic group. These are typically mixed with other chemicals.

Sodium lignosulfonate is a common agent réducteur d'eau. Lignosulfonates can be used as a sulphonating agent and alkali neutralizing agent. They can also be used as a catalyst.

Melamine is a high-efficiency agent réducteur d'eau. Melamine is prepared from a sulfonating agent and an aldehydic acid molecule. This type of agent réducteur d'eau has very high efficiency and is suitable for engineering with a good flowability and excellent durability.