With the gradual enrichment of the types of concrete, the types of superplasticizers have also elevated, and naphthalene superplasticizers and polycarboxylic acid superplasticizers are beginning to be extensively used in concrete [27,28]. Though there have already been a lot of types of superplasticizers, which might be all based on OPC, https://large-scale-3d-printing72592.glifeblog.com/36413410/glass-microspheres-can-be-fun-for-anyone