Post-installed screws for in-situ assessment of mortar strength

DC FieldValueLanguage
dc.contributor.authorSourav, Shah Nur Alam-
dc.contributor.authorAl-Sabah, Salam-
dc.contributor.authorMcNally, Ciaran-
dc.descriptionEuropean Safety and Reliability Conference ESREL, 2017, June 18-22, Portoroz, Sloveniaen
dc.description.abstractFor capacity evaluation, the structural assessment of existing structures is necessary. Concrete strength is an important parameter for such assessment. Non-destructive tests (NDTs) are used along with the traditional approach of core testing for strength assessment of concrete in existing structures. The low reliability of NDT results leads to uncertainty in assessing concrete strength. A new method of non-destructive testing is presented in this paper with the aim of achieving better reliability and reducing uncertainty in the assessment of mortar strength. This approach is based on a modified pullout of post-installed screw anchors. The technique involves a pushin mechanism for a steel screw inside the mortar where a void underneath the screw is left to allow for the uninterrupted movement of the screw inside the concrete. The failure pattern involves local crushing of concrete between the threads of the screw. This paper investigates the load bearing behaviour of threaded screws installed in cement mortar under compressive loading. The results supports the application of the technique in the assessment of compressive strength of mortar. The main parameters affecting the pushin behaviour are presented and their effects are discussed. It is planned to extend the test program to concrete in the future.en
dc.description.sponsorshipEuropean Commission Horizon 2020en
dc.subjectNon-destructive testsen
dc.subjectConcrete screwsen
dc.titlePost-installed screws for in-situ assessment of mortar strengthen
dc.typeConference Publicationen
dc.statusPeer revieweden
dc.neeo.contributorSourav|Shah Nur Alam|aut|-
item.fulltextWith Fulltext-
Appears in Collections:Civil Engineering Research Collection
TRUSS-ITN Research Collection
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