Page 289 - Handbook of Thermal Analysis of Construction Materials
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268                        Chapter 7 - Superplasticizing Admixtures




















































                              Figure 5. DTG of the mixture C A-Ca(OH) -gypsum hydrated for different periods in the
                                                     3
                                                             2
                              presence of SNF admixture.



                                     The conduction calorimetric work and adsorption studies indicate
                              that the retarding action of SMF and SNF in the C A-gypsum system is
                                                                           3
                              related to the preferential adsorption of superplasticizer molecules on the
                                                         -2
                              C A and the competition of SO  ions in the early stages of hydration. [1][10]
                               3
                                                         4
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