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| Author(s): |
Brunoro Leite Giordano
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Escola Politécnica (EP/BC) |
| Defense date: | 2011-12-09 |
| Examining board members: |
Vanderley Moacyr John;
Antonio Domingues de Figueiredo;
Jardel Pereira Gonçalves
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| Advisor: | Vanderley Moacyr John |
| Abstract | |
The objective of this work is controlling the incidence of cracks in fiber cement, using the concept of functionally graded materials through the chemical prestressing, generated by application of alkaline sodium silicate among fiber cement layers. Currently, its very common the fiber cements present cracks along the edges due to moisture gradients, caused during storage of piles of tiles in the courtyard of the industry. The chemical prestressing potential was evaluated through of the total porosity, the quantification of hydrate phases, the drying shrinkage and the mechanical performance. The application of alkaline sodium silicate in the cement CPII F caused drying shrinkage 1,5 times greater than the reference to 91 days. The modulus of rupture (MOR) didnt suffer change, but the proportional limit of matrix (LOP) increased by around 95%. The dynamic modulus of elasticity was 13% higher. The increase of drying shrinkage and the mechanical performance gain indicate the chemical prestressing potential to control the cracking in fiber cement produced by the process Hatschek. (AU) | |
| FAPESP's process: | 08/07952-9 - Control of cracking in asbestos free fibercement applying concept FGM |
| Grantee: | Brunoro Leite Giordano |
| Support Opportunities: | Scholarships in Brazil - Master |