Introduction of the characteristics of lignin fiber:
Today, the Lignosulfonate manufacturer Bailin Group introduces the characteristics of lignin fiber.
lignin fiber has a weak cross-linking weaving function. After it is mixed with other materials, the fibers are lapped into a three-dimensional structure, which can lock water between them to retain water and retard. The longer the fiber, the greater the thickening effect. When the shear force acts on it (such as stirring, scraping), part of the liquid will be thrown from the fiber structure into the matrix, resulting in a decrease in viscosity and an advancement of workability. When the activity is stopped, the fiber structure will recover and recover very quickly. Absorb the water back and restore the original viscosity.
The mechanical function that occurs during the coagulation or drying process is weakened by the fiber tendons. The dimensional stability of lignin fiber is very good, which means that the mixture will not shorten the settlement, and improve its crack resistance. Because of the reinforcement and thickening of lignin fiber, when the appropriate amount of lignin fiber is added, the thicker plaster can be finished at one time without sagging.
During the construction process, the hydration reaction of the cement mortar will release a lot of heat and absorb water. If the opening time is short and the drying time is fast, the volume of the cement mortar will shorten faster and crack. Therefore, the special three-dimensional network structure and certain water retention of lignin fiber are particularly important, and its fiber absorbs liquid through its own capillary action. When solidified, the internal water is transported to the surface of the medium through the capillary tube to reduce the occurrence of skinning.
Under the action of the water retaining agent, the water is evenly distributed in the cement mortar, which can greatly slow down the water volume during the hydration reaction. It consumes quickly to prevent the strength drop and cracking caused by too fast water loss, so that the bonding strength and appearance strength of the material advance significantly.