The water reducing agent is a additive commonly used in concrete and mortar. The mechanism of decentralization is as follows:
Surface active agent: Water reduction agent usually contains surfactant components. These compounds form a adsorption layer in water. This adsorption layer can reduce the surface tension of water, making water easier to contact solid particles and humidity. This effect helps water uniformly scattered in concrete or mortar, thereby improving the fluidity of the material.
Charge effect: The molecules of water reducing agents usually have a charged nature, and the common charge is the negative charge. When the water reducing agent is added to the water, these negatively charged water reducing agents will be adsorbed on the surface of the water molecule to form a ion double layer. This double -layer can generate charge exclusion, so that the solid particles in the concrete or mortar belt with homosexual charge, thereby rejecting each other, reducing the adsorption force and aggregation between the particles, and making the particles more dispersed.
Gap filling effect: The existence of the molecules of water reducing agent can occupy some blisters, reduce the number and size of the blisters, thereby increasing the contact area between solid particles in concrete or mortar. In this way, the friction between the particles will be reduced, and the internal friction of the material will also decrease, thereby improving the flow of the material.
In summary, the water reduction agent can promote water to better disperse in concrete or mortar through the mechanism such as surfactants, charge effects, and gap filling effects. These functions help improve the working performance of concrete or mortar and improve their strength and durability to a certain extent.