Tham khảo tài liệu 'integrated waste management volume ii part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Recycling of Waste Paper Sludge in Cements Characterization and Behavior Of New Eco-Efficient Matrices 307 to the activation conditions of the paper sludge. This fact may be explained as the consequence of the sludge activation temperature that is higher at an industrial scale than it is at a laboratory scale. Moreover other parameters may be involved such as the morphology of metakaolinite the different origins of the paper sludge and the kaolinite calcite ratio. After a reaction time of 28 days the pozzolanic behavior of both mixtures was very similar and evened out at reaction times of over 90 days due to the slower speed of the pozzolanic reaction of the fly ash Sánchez de Rojas et al. 1993 and 1996 . It is worth highlighting that in the ISP FA mixture a significant jump in lime consumption takes place between day 7 and day 28 of the reaction time. This fact may be due to the fly ash acting as an activator of the pozzolanic reaction between the activated sludge and the surrounding lime as additional quicklime is available from the industrial sludge. 3. The behavior of binary and ternary blended cement prepared with thermally activated paper sludge Scientific aspects Reaction kinetics in binary cements with the addition of 10 activated sludge In general the kinetics of pozzolanic reactions depends on various chemical physical and mineralogical factors. In a study of the influence of the activation conditions on the hydrated phases percentages of 10 and 20 cement were replaced in this study which gave similar results. For example the mineralogical behavior is described here over the reaction time in prismatic specimens 1x1x6 cm of paste cement prepared with the addition of 10 paper sludge calcined at 700 C 2h. XRD and SEM EDX techniques were used to perform the kinetic study of the reaction so as to semi-quantify the formation of hydrated phases and the development of their morphologies with the reaction time. The XRD results are provided in Table 2 .
