Polycarboxylate water-reducing agent is a cement dispersant used in cement concrete. It can significantly improve the pore size distribution of hardened mortar. It can introduce a large number of small and medium-sized bubbles while reducing the proportion of large-sized bubbles, making the bubble pore size distribution smaller. change. What is the price of polycarboxylate superplasticizer? If you want to know its price, you must first understand what kind of product it is. Chemically, it can be divided into two categories.
One of the polycarboxylate water-reducing agents has a main chain of methacrylic acid, a side chain of carboxylic acid groups and an MPEG polyester structure. The other one has a main chain of polyacrylic acid and a side chain of polyether structure; of course, many similar products have been derived from this. Due to the ease of hydrolysis of polyester polycarboxylic acids under strong alkaline conditions in concrete and the complexity of the process, its dosage may be declining.
The strength of cement concrete depends on the ratio of water to cement, W/C, water-cement ratio. When W/C is smaller, the strength of the concrete material is higher. This is why it is also called concrete water reduction. The reason for the agent. Of course, for concrete construction, the concrete must maintain a certain degree of workability and fluidity. The routine test is the slump of the concrete.
As the third generation of high-performance water-reducing agent, polycarboxylate water-reducing agent has attracted more and more attention due to its advantages of low dosage and high water-reducing rate. Compared with other types of water-reducing agents, the molecular structure of polycarboxylate water-reducing agents is highly designable, providing multiple ways to optimize its performance. Among them, the relationship between the structure and performance of polycarboxylate superplasticizer has always been a hot research topic. With the application and popularization of polycarboxylate superplasticizers in concrete, the understanding of the performance characteristics of polycarboxylate superplasticizers is also deepening. As an air-entraining water-reducing agent, polycarboxylate water-reducing agent needs to be used correctly and give full play to its performance, as well as correctly understand its air-entraining characteristics. This is of great significance to its rational use and popularization.
In terms of historical development, before the emergence of polycarboxylic acid admixtures, there were lignosulfonate admixtures, naphthalene sulfonate formaldehyde condensates, melamine formaldehyde condensates, and acetone sulfonate formaldehyde. Condensates, sulfamate formaldehyde condensates, etc. These products have certain advantages in cost and are adaptable to high mud content in materials such as sand and gravel. They have a large market share and are used in concrete projects. They are used in various applications to varying degrees; in view of this, do you think that the price of polycarboxylate water-reducing agent is very expensive?
The advantage of high-performance concrete is not only its high strength, but more importantly, the This structural material has a series of corresponding excellent properties. Its early strength develops rapidly and requires only a short maintenance period even in winter, ensuring the speed of project progress; it has long-term durability; it has strong resistance to chemical corrosion and can be used in various special projects; On the basis of water rate and high strength, it also has excellent construction properties such as excellent working performance, easy pumping, and easy compaction. Among the technical measures for preparing high-performance concrete, the key lies in the rational use of high-performance chemical admixtures, especially high-performance water-reducing admixtures that have efficient water reduction, appropriate air entrainment, and can reduce and prevent slump loss over time.
In a sense, the most important feature of the current gap in concrete technology between countries is the development level of admixtures, especially high-performance water-reducing admixtures; therefore, the price of polycarboxylate water-reducing admixtures This needs to be judged based on the product you choose.
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