With the gradual enrichment of the types of concrete, the types of superplasticizers have also increased, and naphthalene superplasticizers and polycarboxylic acid superplasticizers are beginning to be widely used in concrete [27,28]. Even though there have already been several types of superplasticizers, that happen to be all based on OPC, https://cristianeeeca.thezenweb.com/fascination-about-refractory-75900877