Polycarboxylate superplasticizer (PCE) is a major raw material of ‘concrete admixtures’, which becomes critical element of concrete. PCE was firstly developed over 20 years ago in Japan. PCE can greatly reduce water demand and cement contents by both effects of electrostatic and steric repulsion. PCE also maintains the fluidity of concrete much longer than normally observed with Naphthalene based polymers and Melamine based polymers without excessive retardation.