The environmental use of Construction&Demolition recycled materials for road construction is widespreading. In the EC-27 more than 850 mln of tons of C&Ds are produced every year. Wherever C&Ds are employed within the pavement layers a uniform and sufficient compaction is required to achieve the wanted bearing capacity for structural purposes. An intensive testing campaign was completed on an experimental stretch of road built with 4 different kind of recycled C&Ds. Compaction was continuously controlled in terms of roller speed, vibration frequency and amplitudes via in-built vario and meter systems. This study focuses on the evolution of stiffness during compaction on different materials, addressing the issue of defining a performance criterion for controlling the uniformity and the degree of compaction of the tested layers. Alongside with CCC roller measurements a series of LWD tests were conducted in order to support the CCC stiffness records and to promote the parallel use of deflectometric devices in the Qc/Qa processes. Finally, data from several embedded pressure cells enabled to assess the effects of roller passes and LWD impulses in depth. In particular, it was worked out the variation of stresses under static and vibrating passes.
Sangiorgi C., Marradi A., Kloubert H.J., Wallrath W (2012). A CCC experimental site for studying the compaction evolution of C&D materials. COLOGNE : FGSV Verlag GmbH.
A CCC experimental site for studying the compaction evolution of C&D materials
SANGIORGI, CESARE;
2012
Abstract
The environmental use of Construction&Demolition recycled materials for road construction is widespreading. In the EC-27 more than 850 mln of tons of C&Ds are produced every year. Wherever C&Ds are employed within the pavement layers a uniform and sufficient compaction is required to achieve the wanted bearing capacity for structural purposes. An intensive testing campaign was completed on an experimental stretch of road built with 4 different kind of recycled C&Ds. Compaction was continuously controlled in terms of roller speed, vibration frequency and amplitudes via in-built vario and meter systems. This study focuses on the evolution of stiffness during compaction on different materials, addressing the issue of defining a performance criterion for controlling the uniformity and the degree of compaction of the tested layers. Alongside with CCC roller measurements a series of LWD tests were conducted in order to support the CCC stiffness records and to promote the parallel use of deflectometric devices in the Qc/Qa processes. Finally, data from several embedded pressure cells enabled to assess the effects of roller passes and LWD impulses in depth. In particular, it was worked out the variation of stresses under static and vibrating passes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
