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(Automatic translation)

Towards an environmentally sustainable concrete pavement using recycled aggregates

James T. SMITH
Department of Civil and Environmental Engineering
University of Waterloo (Canada)

Susan L. TIGHE
Canadian Research Chair pavement and infrastructure management
Department of Civil and Environmental Engineering
University of Waterloo (Canada)

ABSTRACT
Although there is a critical shortage of natural aggregates, it is increasing the availability of demolished concrete for use as recycled concrete aggregate (RCA). The use of waste concrete as RCA preserves natural aggregates, reducing the impact of landfills, reducing energy consumption and can save costs.

It has monitored the behavior of test sections with RCA through continuous evaluation of pavement using the Manual to estimate the state of rigid pavements Ontario Ministry of Transportation and the texture of the surface. It was also endowed pavement sensors to control their behavior based on the long-term environmental conditions.

The four test sections had 48 sensors to control the bending and warpage of the slabs, the development of stresses, the relative movement of the boards, the temperature and maturity. The previous laboratory tests and in situ results provide support for the design of a mixture containing a recycled coarse aggregate quality of a specific size that results in concrete with a similar or better than concrete containing no behavior aggregates recycled.

KEYWORDS
Concrete, Recycled, Barren, paving concrete, recycled concrete, natural Barren Barren recycled.

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