Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/5888

TitleQuality control based on electrical resistivity measurements
Author(s)Ferreira, Rui Miguel
Jalali, Said
KeywordsElectrical resistivity
Durability
Quality control
Issue date2006
CitationEUROPEAN SYMPOSIUM ON SERVICE LIFE AND SERVICEABILITY OF CONCRETE STRUCTURES, Helsink, 2006 - “ESCS-2006 : European Symposium on Service Life and Serviceability of Concrete Structures : proceedings”. [S.l. : s.n., 2006].
Abstract(s)The electrical resistivity of concrete is one of the main parameters controlling the initiation and propagation of reinforcement corrosion. It is common knowledge that concrete electrical resistivity is mainly dependent on the w/c ratio (pore connectivity), volume and type of cement, temperature and the moisture. This research work studies the effect of specimen shape and temperature of measurement on electrical resistivity measurements of concrete using the four-point Werner electrode. In addition, the estimation of future values based on early age measurements is also studied. Research has indicated that there is a strong relationship between electrical resistivity and durability indicators at a given age. A relationship for the estimation of the electrical resistivity using early age measurements is suggested. Furthermore, it was observed that temperature has a significant influence on the electrical resistivity of concrete. Based on test results, a relationship similar to the Arrhenius equation is also suggested that can be used for conversion of electrical resistivity measurements to a reference temperature. Based on these equations, the electrical resistivity and compressive strength of concrete at 28 days is predicted using values of electrical resistivity of up to 7 days. Errors depend on the equation used but are approximately 5 % for estimates up to 28 days.
TypeConference paper
URIhttp://hdl.handle.net/1822/5888
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CEC-MAT - Comunicações a Conferências Internacionais

Files in This Item:
File Description SizeFormat 
FinlândiaESCS_2006.pdfmain article151,1 kBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID