Ūdens samazināšanas līdzeklis

Ūdens samazināšanas līdzeklis ir piejaukums, kas var palīdzēt samazināt ūdens patēriņu un arī uzlabot betona izturību un funkcionalitāti. The first ūdens samazināšanas līdzeklis 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.

Parasti, water reducing admixtures fall into three categories: low, medium, and high. 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 ūdens samazināšanas līdzekliss. 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 ūdens samazināšanas līdzeklis, 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 ūdens samazināšanas līdzeklis. 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 ūdens samazināšanas līdzeklis. Melamine is prepared from a sulfonating agent and an aldehydic acid molecule. This type of ūdens samazināšanas līdzeklis has very high efficiency and is suitable for engineering with a good flowability and excellent durability.