Full text
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| Author(s): |
Ester Tseng
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: | 2010-08-11 |
| Examining board members: |
José Tadeu Balbo;
Sérgio Cirelli Angulo;
Vladimir Antonio Paulon
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| Advisor: | José Tadeu Balbo |
| Abstract | |
The study of concrete pavement recycling for its use in new pavements has shown to be of great importance considering the quantity of materials that are necessary to reconstruct these roads. Besides the environmental gain, due to a lesser extraction of aggregates, there is also an economic gain, with smaller transportation and material purchasing costs. The aggregate originated from the crushing of old concrete slabs has historically been shown to be able to be employed in the construction of a new concrete pavement. However, there are limitations, since its utilization does not result in a concrete with the exact same properties of the conventional concrete. The present work presents the results from the analysis of the characteristics from the aggregates produced through the crushing of old concrete slabs using a jaw crusher and an impact crusher, as well as the influence of the use of recycled aggregates on the concrete mechanical properties. The crusher type comparative study has shown that aggregates obtained from a jaw crusher and from an impact crusher have very similar characteristics. The concrete mechanical characteristic study reveals that flexural strength, indirect tensile strength and modulus of elasticity decrease as the aggregates water absorption increase. Concerning compressive strength, however, there was no observed decrease when only coarse recycled aggregates were used. Nevertheless, when fine recycled aggregates were employed besides coarse recycled aggregates, there was a decrease in compressive strength. (AU) | |
| FAPESP's process: | 09/01972-0 - Full Recycling of Concrete Pavements for Use as Aggregate for New Concrete Pavement Construction |
| Grantee: | Ester Tseng |
| Support Opportunities: | Scholarships in Brazil - Master |