| Grant number: | 13/03688-3 |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| Start date: | November 01, 2013 |
| End date: | July 21, 2014 |
| Field of knowledge: | Engineering - Civil Engineering - Construction Industry |
| Principal Investigator: | Rafael Giuliano Pileggi |
| Grantee: | Bruno Luís Daminelli |
| Host Institution: | Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil |
Abstract The increasing demand for cement in developing countries, the high level of CO2 emissions in its production and the limited potential of current strategies for reducing this impact leads the concrete chain to search for alternatives. Among these, stands out the optimization of binder use in concrete, which can allow increasing cement production at required levels, reducing costs and CO2 emissions due to clinker content decrease.Preliminary results have shown that, by increasing the packing of concrete compositions with the use of inert fines (fillers), it is possible to reduce the clinker content of concrete in up to 75% in cases of great efficiency, while maintaining the rheological and mechanical properties suitable. For this, the use of fillers for replacing clinker to enhance the packing of cement matrix has relevant hole. Among these fines, limestone-based are the ones that have satisfactory availability for supplying cement production chain. However, the great diversity of limestone fillers makes this replacement not trivial because their different physical-chemical characteristics interact on diverse ways with clinker particles, changing the behavior of cementitious suspensions. The objective of this study is to evaluate the influence of the physic-chemical characteristics of different limestone fillers on dispersion efficiency of cementitious suspensions. For this, it will investigate the impact of fillers on rheological behavior and hydration kinetics of suspensions composed by different combinations of clinker, limestone fillers and dispersants. It will also analyze physical and mechanical properties of these suspensions in hardened state. (AU) | |
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