With the rapid development of the national economy and the continuous expansion of the application fields of concrete additives, the demand for concrete is increasing, the quality requirements are getting higher and higher, and the performance requirements are becoming more comprehensive and diversified. Therefore, the need for concrete additives The variety and performance requirements are getting higher and higher, and the technical level requirements for the application of admixtures are also getting higher and higher. The development of concrete additives will have the following trends:
1. Design external concrete additives according to usage requirements
The requirements for concrete additives used under different conditions are also different, and sometimes even require the additives to have multiple function. The multifunctionalization of concrete additives can be understood as designing admixtures based on performance. Designing admixtures based on performance can reduce the cost of concrete materials, meet the requirements of “design based on performance” for high-performance concrete, and optimize the performance of admixtures and concrete. Research on performance-based design of concrete additives and their mechanisms has very important theoretical significance and engineering application value.
Chemical synthesis and physical compounding are two technical ways to design concrete additives according to usage requirements. As long as the usage requirements are met, no matter what approach is taken, it is advisable. It is particularly worth mentioning that the molecular structure characteristics of the polycarboxylic acid-based water-reducing agent can be changed according to the requirements of use, so that the polycarboxylic acid-based water-reducing agent can be developed in a targeted manner to meet the actual needs of different projects.
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