As people continue to deepen their research on concrete admixtures, the future development of water-reducing admixtures will develop in the direction of composite admixtures. In order to ensure the quality of concrete projects, the water-reducing agents used in the projects have corresponding quality standards. The quality of concrete water-reducing agents must not only comply with relevant national standards but also comply with relevant industry standards. In order to better analyze the impact of different factors on the performance of water-reducing agents, this article starts with factors such as production raw materials and storage methods, and studies their impact on the working performance and strength of concrete, in the hope of providing information for the research of water-reducing agents. Certain experimental basis.
The application of various water reducing agents has improved the performance of fresh and hardened concrete, promoted the development of new concrete technologies, promoted more applications of industrial by-products in cementitious material systems, and also contributed to Resource conservation and environmental protection have gradually become indispensable materials for high-quality concrete. Water reducing agent, also known as dispersant or plasticizer, is a commonly used admixture in the ready-mixed concrete industry. When used, it can reduce the water consumption of single concrete while improving the workability of fresh concrete, and improve the strength and durability of concrete.
1. The influence of water reducing agent on the rheological properties of fresh concrete
To prepare fresh concrete with good flow properties, it is necessary to disassemble and reduce the viscosity between cement particles that hinders the flow. structure, so that the cement particles are fully dispersed in the water medium. There are many properties that affect the melting of cement, such as the mineral composition of cement, the shape and size of cement particles, the completeness of mineral crystallization, operating conditions and environmental factors, etc. The various factors mentioned above directly or indirectly control the stability of cement particles in the slurry. Different medium conditions may change the charge value of cement particles in the slurry, that is, change the electrostatic repulsion between particles.
2. The effect of water reducing agent on the workability of fresh concrete
There are many factors that affect the workability of fresh concrete, mainly cement, aggregates, water consumption, and The nature and dosage of the agent, temperature and other factors. When other conditions are the same, workability has a certain relationship with the type and dosage of water reducing agent. The workability of fresh concrete is usually measured using slump value measurements. After the concrete is mixed and poured, there needs to be a period of transportation and parking, which often makes the workability of the concrete worse and makes construction difficult.
3. The influence of water reducing agent on concrete setting time
Concrete setting time is an important parameter in construction, especially for large-volume concrete construction. Adding an appropriate amount of retarder can delay the setting time of concrete and facilitate the solution of problems that arise during construction
As a professional manufacturer of water reducing agents, Guangxi Dahai Building Materials reminds you that during the construction process It is recommended to use water-reducing agents rationally, because the role of water-reducing agents greatly improves the physical properties of fresh concrete, increases the strength level and durability of hardened concrete, and saves the amount of cement. </p
微信扫一扫打赏
