減水剤

減水剤は、水の使用量を削減し、コンクリートの耐久性と機能性を向上させることができる混和剤です。. The first 減水剤 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.

通常, water reducing admixtures fall into three categories: low, 中くらい, そして高い. 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 減水剤s. 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 減水剤, 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 減水剤. 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 減水剤. Melamine is prepared from a sulfonating agent and an aldehydic acid molecule. This type of 減水剤 has very high efficiency and is suitable for engineering with a good flowability and excellent durability.