Aalborg Universitet Glass Particles as an Active and CO2 Reducing Component in Future Cement Moesgaard, Mette Glass Particles as an Active and CO 2 Reducing Component in Future Cement Assessment committee deserve a special credit for performing the NMR spectroscopy investigations, and acknowledgement goes to
Mette Moesgaard, Reinhard Conradt, Donald Macphee, Kristian Keiding, Yuanzheng Supervisor, Yue, Jørgen Skibsted, Søren Poulsen, Jens Rafaelsen
unpublished
Portland cement manufacture is an energy intensive industry responsible for approximately 5% of the global anthropogenic CO 2 emission. Considerable efforts are thus being made by the industries to reduce their CO 2 emissions. The approach taken in this study is to lower the CO 2 emissions from cement production by clinker substitution. This means that the clinker is partly substituted by supplementary cementitious materials (SCMs). This work deals with the development of innovative SCMs based
more »
... n calcium aluminosilicate (CAS) glass particles produced specifically for the purpose as SCM. The objectives of this study fall into two parts:1) Optimization of the composition of the CAS glasses to reduce the CO 2 emission linked to glass production while as the same time ensuring high pozzolanic reactivity (i.e., the ability of the glasses to participate in the formation of strength giving hydration phases when mixed with the cement); 2) Study of both the physical performances of blended cements containing 30 wt% of the newly developed SCMs and the hydration behavior. In addition to the blended cements containing just one SCM, investigations are carried out on cements containing both limestone and CAS glass particles. vii Preface This dissertation is submitted to the Faculties of Engineering and Science, Aalborg University in partial fulfillment of the requirement for obtaining the Ph.D. degree. Throughout the thesis the common cement chemistry abbreviations for the oxides are used when suitable. The most widely used are: C = CaO, S = SiO 2 , A = Al 2 O 3 , F = Fe 2 O 3 , H = H 2 O, S' = SO 3 etc. If nothing else is stated, % always refers to wt%. I would like to thank my supervisor Yuanzheng Yue for his help, guidance and encouragement throughout this project and for the many fruitful discussions. I really enjoyed our collaboration. Kind acknowledgements also go to my collaboration partners at Aalborg Portland A/S -Duncan Herfort, Lise Frank Kirkegaard and Mette Steenberg -for all your practical assistance with performance of cement related experiments and for the many discussions regarding the challenging cement chemistry.
fatcat:xb36nbflqbhp5blpssmvqyfwju
