Application of cyclodextrin as a slow-release agent for concrete

With the increase of temperature, the retarding effect of hydroxyl carboxylic acid and its salts is obviously reduced. In the hot weather and high temperature environment, as a new type of high temperature retarder, the unstable complex of beta cyclodextrin and calcium hydroxide in cement inhibits the hydration of three calcium silicate, which temporarily postpones the process of water mud hydration and also inhibits the concrete. The slump loss has a very good effect. The main role of the use of beta cyclodextrin in concrete is as follows.

It is used to delay the coagulation time (initial and final coagulation) during the concrete construction in hot weather and high temperature environment and large volume concrete casting and forming. The mixing of large volume concrete with beta cyclodextrin can slow down the release of hydration heat, which is conducive to the dissipation of heat, reducing the internal and external temperature difference of concrete and avoiding temperature crack. The addition of beta cyclodextrin in commercial concrete and fluidized concrete can adjust and control the slump loss, which makes the concrete keep good fluidity and pumpability in the required time period. The compactness of concrete can be significantly increased to improve the durability of concrete, for example, for national key projects such as high-speed railway Bridges.

Addingbeta cyclodextrin to high-quality concrete is very good, but the price of cyclodextrin on the market is relatively higher than that of concrete, which means the cost is increased. Binzhou zhiyuan biotechnology co., ltd. has developed a cheaper version of beta cyclodextrin by adjusting the mixing ratio of beta cyclodextrin. Welcome friends from the concrete industry to negotiate with us, we will have the right products for you.