Qc/Qa approach to pavement construction requires that correlated methods of measurement can be employed either by the contractors - guaranteeing the work reliability - and the controller. The case of bearing capacity evaluation for subgrade and foundation layers is today moving from traditional testing (PLT), through Portable FWDs and FWDs, to the latest version of CCC and IC systems. Most of the modern vibrating compactors can be geared with in-built testing devices able to evaluate the stiffness level of the compacted layer down to a decimetric span, during compaction. On the other hand, Portable FWDs can quickly define a dense pattern of measurements in order to assess if the surface stiffness complies with requirements. This paper presents a preliminary testing campaign, aiming to contribute to the discussion of researchers for the CCC and PFWD systems integration as cross validation methods. A full scale double trial site have been constructed and monitored with a common IC-CCC drum and two different PFWDs. Results are also presented in the form of spatial geostatistic analysis.
A preliminary comparison of Continuous Compaction Control and Portable FWD systems for Qc/Qa / A. MARRADI; U. PINORI; C. SANGIORGI; C. LANTIERI. - STAMPA. - (2010), pp. 447-456. (Intervento presentato al convegno 2nd international Conference on Transport infrastructures tenutosi a Hotel Ibirapuera – São Paulo, Brazil nel 4 - 6 August, 2010).
A preliminary comparison of Continuous Compaction Control and Portable FWD systems for Qc/Qa
SANGIORGI, CESARE;LANTIERI, CLAUDIO
2010
Abstract
Qc/Qa approach to pavement construction requires that correlated methods of measurement can be employed either by the contractors - guaranteeing the work reliability - and the controller. The case of bearing capacity evaluation for subgrade and foundation layers is today moving from traditional testing (PLT), through Portable FWDs and FWDs, to the latest version of CCC and IC systems. Most of the modern vibrating compactors can be geared with in-built testing devices able to evaluate the stiffness level of the compacted layer down to a decimetric span, during compaction. On the other hand, Portable FWDs can quickly define a dense pattern of measurements in order to assess if the surface stiffness complies with requirements. This paper presents a preliminary testing campaign, aiming to contribute to the discussion of researchers for the CCC and PFWD systems integration as cross validation methods. A full scale double trial site have been constructed and monitored with a common IC-CCC drum and two different PFWDs. Results are also presented in the form of spatial geostatistic analysis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
