When mixing concrete, water-reducing agents are often added, and of course early-strength admixtures, and some even have early-strength type water-reducing agents. So what are the functions of the two? What is the difference between early strength agent and water reducing agent?
1. Water reducing agent is a concrete admixture that can reduce the amount of mixing water. Most of them are anionic surfactants, including lignin sulfonate, naphthalene sulfonate formaldehyde polymer, etc.; early strength agents are used to improve the early strength of concrete. People have successively developed chlorine salts, sulfates, nitrites, and chromic acid. Salt and organic early-strengthening agents such as triethanolamine, calcium formate, and urea.
2. Adding water-reducing agent has a dispersing effect on cement particles, which can improve workability, improve the fluidity of concrete mixture, reduce unit cement consumption, and save cement; adding early-strength agent is to accelerate cement The hydration speed promotes the development of early strength of concrete, which is like an admixture that literally shortens the setting time of cement concrete.
3. The early strengthening agent not only has the function of early strengthening, but also has a certain water-reducing and enhancing function. The water-reducing agent can also achieve the effects of some early-strength agents through processing, so there is an early-strength type water-reducing agent.
Water reducing agent is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them are anionic surfactants, including lignin sulfonate, naphthalene sulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it has a dispersing effect on the cement particles, which can improve its workability, reduce the unit water consumption, and improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement.
Early strength agent, one of the concrete admixtures. Concrete early strength additives refer to admixtures that can increase the early strength of concrete and have no significant impact on later strength. The main function of early strength agent is to accelerate the hydration rate of cement and promote the development of early strength of concrete. It has both early strength function and certain water reduction and enhancement function.
The main function of the water-reducing agent is to keep the strength of the concrete unchanged, reduce the water consumption for concrete mixing, thereby reducing the cement consumption, or enhance the workability of the concrete without increasing the water consumption. But it will not improve the early strength of concrete! It mainly reduces the gaps and cracks caused by the evaporation of water in concrete! It can also improve the strength of concrete to a certain extent.
Early strength agent mainly adds admixtures to improve the early strength of concrete without changing the water-cement ratio. In order to shorten the formwork removal cycle or speed up the construction cycle.
About the difference between early strength admixture and water reducing agent, I will share it here. They are two concrete admixtures with different functions, so when mixing concrete, add them appropriately according to the actual situation, so as to Let concrete do more while reducing costs.
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