4Felekoglu Sarlkahya. Effect of chemical structure of polycarboxylate-based superplasticizers on workability retention of self-compacting concrete[J] . Construction and Building Materials, 2008,22 : 1972-1980.
5Zhang Min-hong, Sisomphonk, Tze Siong Ng. Effect of superplasticizers on workability retention and initial setting time of cement pastes [J]. Construction and Building Materials, 2010,24 : 1700 - 1707.
