Polycarboxylic acid-based superplasticizers are the third generation of high-performance superplasticizers developed after common superplasticizers represented by wood calcium and superplasticizers represented by naphthalene series. This type of water reducing agent has low admixture, large water reduction rate, no segregation, no bleeding, good slump performance of concrete, good compatibility with cement, admixtures and other admixtures, and can be formulated with super high strength and Ultra-durable concrete can effectively reduce the early thermal insulation temperature rise of concrete, reduce the temperature cracks of large-volume concrete, have greater freedom in molecular structure design, and have greater potential for achieving high performance of water reducing agent. Synthesis does not use formaldehyde and other environmental protection The characteristics of contaminated substances provide a technical guarantee for the promotion of the use of large amounts of fly ash, slag and other industrial wastes.
3-Mercaptopropionic acid is a high-performance mediator that controls molecular weight in the production of polycarboxylic acid water reducers. Thiopropionic acid also greatly improves the water reduction and slump retention properties of concrete.
beta-Mercaptopropionic acid can also adjust the relative molecular mass of the water reducer. The proper length of the main chain can realize both the initial water reduction and subsequent collapse protection. Regulate the adsorption process of polycarboxylic acid molecules.