6[3]Ramachandran V S,Bensted J,Collepardi M M,et al.Concrete Admixtures Handbook[M].Noyes Publications,Park Ridge,NJ,USA,1995.
7[5]Neville A M,Brooks J J.Superplasticizers[M].New York:Concrete Technology Longman,1991.156.
8[7]Aiticin P C,Jolicocur C,MacGregor J G.Superplasticizers:how they work and why they occasionally don′t[J].Concr Int,1994,16(5):45-52.
9[9]Call P H.History,overview and applications of mediated lignolytic systems,especially,laccase-mediator-systems (Lignozym-process)[J].Journal of Biotechnology,1997,53:163-202.
10[19]Grabiec A M.Contribution to the knowledge of melamine superplasticizer effect on some characteristics of concrete after long periods of hardening[J].Cement and Concrete Research,1999,29:699-704.